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From: "Rakesh Gandhi (rgandhi)" <rgandhi@cisco.com>
To: "Chengli (Cheng Li)" <chengli13@huawei.com>, Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "draft-ietf-spring-mpls-path-segment.authors@ietf.org" <draft-ietf-spring-mpls-path-segment.authors@ietf.org>
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From: <bruno.decraene@orange.com>
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Hi authors,

Speaking as individual contributor.

This document seems to define multiple types of segments (1 to 11).
May be this document would be the right place to define them normatively an=
d creates the IANA registry for them. And this seems like a work for spring.
Otherwise, there is a risk that other documents redefine them, possibly in =
a non-consistent manner. (1) E.g.  the BGP draft is not using the same type=
 numbers/name, which may bring confusion. I would expect YANG models to als=
o need these types.
BTW is there any chance to align the types in the BGP document or is this t=
oo late? (alternatively may be changing the types in the sr-policy document)

Thanks,
Regards,
Bruno

(1)
SR-policy:

   Type 1: SR-MPLS Label:

   Type 2: SRv6 SID:

   Type 3: IPv4 Prefix with optional SR Algorithm:

   Type 4: IPv6 Global Prefix with optional SR Algorithm for SR-MPLS:

   Type 5: IPv4 Prefix with Local Interface ID:

   Type 6: IPv4 Addresses for link endpoints as Local, Remote pair:

   Type 7: IPv6 Prefix and Interface ID for link endpoints as Local, Remote=
 pair for SR-MPLS:

   Type 8: IPv6 Addresses for link endpoints as Local, Remote pair for SR-M=
PLS:

   Type 9: IPv6 Global Prefix with optional SR Algorithm for SRv6:

   Type 10: IPv6 Prefix and Interface ID for link endpoints as Local, Remot=
e pair for SRv6:

   Type 11: IPv6 Addresses for link endpoints as Local, Remote pair for SRv=
6:


BGP:
   1     MPLS SID sub-TLV                            This document
   2     SRv6 SID sub-TLV                            This document
   3     IPv4 Node and SID sub-TLV                   This document
   4     IPv6 Node and SID for SR-MPLS sub-TLV       This document
   5     IPv4 Node, index and SID sub-TLV            This document
   6     IPv4 Local/Remote addresses and SID sub-TLV This document
   7     IPv6 Node, index for remote and local pair  This document
         and SID for SR-MPLS sub-TLV
   8     IPv6 Local/Remote addresses and SID sub-TLV This document
   9     Weight sub-TLV                              This document
   10    IPv6 Node and SID for SRv6 sub-TLV          This document
   11    IPv6 Node, index for remote and local pair  This document
         and SID for SRv6 sub-TLV
   12    IPv6 Local/Remote addresses and SID for     This document
         SRv6 sub-TLV


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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Hi authors,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Speaking as individual contributor.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">This document seems to define multiple types of segments (1 to 11).<o:p>=
</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">May be this document would be the right place to define them normatively=
 and creates the IANA registry for them. And this seems like a work for spr=
ing.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Otherwise, there is a risk that other documents redefine them, possibly =
in a non-consistent manner. (1) E.g.
<span style=3D"mso-spacerun:yes">&nbsp;</span>the BGP draft is not using th=
e same type numbers/name, which may bring confusion. I would expect YANG mo=
dels to also need these types.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">BTW is there any chance to align the types in the BGP document or is thi=
s too late? (alternatively may be changing the types in the
<span class=3D"SpellE">sr</span>-policy document)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Bruno<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">(1)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">SR-policy:<o:p></o:p></span></p>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 1: SR-MPLS Label:<o:p></o:p></sp=
an></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 2: SRv6 SID:<o:p></o:p></span></=
pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 3: IPv4 Prefix with optional SR =
Algorithm:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 4: IPv6 Global Prefix with optio=
nal SR Algorithm for SR-MPLS:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 5: IPv4 Prefix with Local Interf=
ace ID:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 6: IPv4 Addresses for link endpo=
ints as Local, Remote pair:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 7: IPv6 Prefix and Interface ID =
for link endpoints as Local, Remote pair for SR-MPLS:<o:p></o:p></span></pr=
e>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 8: IPv6 Addresses for link endpo=
ints as Local, Remote pair for SR-MPLS:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 9: IPv6 Global Prefix with optio=
nal SR Algorithm for SRv6:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 10: IPv6 Prefix and Interface ID=
 for link endpoints as Local, Remote pair for SRv6:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-US"><span style=3D"=
mso-spacerun:yes">&nbsp;&nbsp; </span>Type 11: IPv6 Addresses for link endp=
oints as Local, Remote pair for SRv6:<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">BGP:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>1<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>MP=
LS SID sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>2<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>SR=
v6 SID sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>3<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v4 Node and SID sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>4<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v6 Node and SID for SR-MPLS sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>5<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v4 Node, index and SID sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>6<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v4 Local/Remote addresses and SID sub-TLV This document<o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>7<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v6 Node, index for remote and local pair<span style=3D"mso-spacerun:yes">&n=
bsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>and SID for SR-MPLS sub-TLV<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>8<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>IP=
v6 Local/Remote addresses and SID sub-TLV This document<o:p></o:p></span></=
p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>9<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>We=
ight sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</spa=
n>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>10<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp; </span>IPv6 No=
de and SID for SRv6 sub-TLV<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>11<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp; </span>IPv6 No=
de, index for remote and local pair<span style=3D"mso-spacerun:yes">&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>and SID for SRv6 sub-TLV<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;&n=
bsp;
</span>12<span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp; </span>IPv6 Lo=
cal/Remote addresses and SID for<span style=3D"mso-spacerun:yes">&nbsp;&nbs=
p;&nbsp;&nbsp;
</span>This document<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229=
.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2p=
t 687.0pt 732.8pt">
<span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&quot;Courier Ne=
w&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-ansi-langua=
ge:EN-US;mso-fareast-language:FR"><span style=3D"mso-spacerun:yes">&nbsp;
</span><span style=3D"mso-spacerun:yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;</span></span><span style=3D"font-size:10.0pt;font-family:&quot;Cour=
ier New&quot;;mso-fareast-font-family:&quot;Times New Roman&quot;;mso-farea=
st-language:FR">SRv6
<span class=3D"SpellE">sub</span>-TLV<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
</div>
<PRE>______________________________________________________________________=
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Hi authors,

You have requested WG adoption for draft-voyer-spring-sr-p2mp-policy
https://tools.ietf.org/html/draft-voyer-spring-sr-p2mp-policy-03

Reviewing the document, I'd like to propose a simplification along two dire=
ctions:

a)      Re-use the existing SR-policy framework as much as possible

b)      Define the SR replication policy only (aka spray) and make the Tree=
-SID as out of scope.

"a" would allow to simplify the text of the draft, enforces that the sr-pol=
icy framework is consistent, re-uses all existing behavior from SR-policy. =
In short, the SR replication policy may possibly be defined as replicating =
over N  SR-policies.
"b" would remove the specification of Tree-SID. I would argue that Tree-SID=
 is not adequately specified in this document, but rather left to the contr=
oller/PCE. Also the SPRING WG is not really chartered nor have the expertis=
e to define a specification creating a multicast tree (in particular the ha=
ndling of topology changes and the avoidance of loops). Note that you can s=
till introduce the Tree-SID name if you want, e.g. saying can one can built=
 one using one or multiple SR replication policies, but specifying that thi=
s is out of scope of this document.

Please let me know what you think about this.

On a side note, although this can be addressed after WG adoption, it would =
be good if the reader of the section "Security Considerations" had the impr=
ession that the security considerations have really been considered. E.g. t=
he policies been locally configured so it seems like there is room for conf=
iguring inconsistent policies on two nodes, creating a multicast forwarding=
 loops. (Unless may be if you provide enough restrictions in the specificat=
ion of the SR-replication policy). I'm not necessarily asking for a solutio=
n, but at least mentioning the issue.

Thanks,
Regards,
--Bruno

___________________________________________________________________________=
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pt">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Hi authors,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">You have requested WG adoption for draft-voyer-spring-sr-p2mp-policy<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><a href=3D"https://tools.ietf.org/html/draft-voyer-spring-sr-p2mp-policy=
-03">https://tools.ietf.org/html/draft-voyer-spring-sr-p2mp-policy-03</a><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Reviewing the document, I&#8217;d like to propose a simplification along=
 two directions:<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-US" style=3D"mso-bidi-font-f=
amily:Calibri;mso-ansi-language:EN-US"><span style=3D"mso-list:Ignore">a)<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"mso-ansi-langu=
age:EN-US">Re-use the existing SR-policy framework as much as possible<o:p>=
</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-US" style=3D"mso-bidi-font-f=
amily:Calibri;mso-ansi-language:EN-US"><span style=3D"mso-list:Ignore">b)<s=
pan style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"mso-ansi-langu=
age:EN-US">Define the SR replication policy only (aka spray) and make the T=
ree-SID as out of scope.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">&#8220;a&#8221; would allow to simplify the text of the draft, enforces =
that the
<span class=3D"SpellE">sr</span>-policy framework is consistent, re-uses al=
l existing behavior from SR-policy. In short, the SR replication policy may=
 possibly be defined as replicating over N<span style=3D"mso-spacerun:yes">=
&nbsp;
</span>SR-policies.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">&#8220;b&#8221; would remove the specification of Tree-SID. I would argu=
e that Tree-SID is not adequately specified in this document, but rather le=
ft to the controller/PCE. Also the SPRING WG is not
 really chartered nor have the expertise to define a specification creating=
 a multicast tree (in particular the handling of topology changes and the a=
voidance of loops). Note that you can still introduce the Tree-SID name if =
you want, e.g. saying can one can
 built one using one or multiple SR replication policies, but specifying th=
at this is out of scope of this document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Please let me know what you think about this.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">On a side note, although this can be addressed after WG adoption, it wou=
ld be good if the reader of the section &#8220;Security Considerations&#822=
1; had the impression that the security considerations
 have really been considered. E.g. the policies been locally configured so =
it seems like there is room for configuring inconsistent policies on two no=
des, creating a multicast forwarding loops. (Unless may be if you provide e=
nough restrictions in the specification
 of the SR-replication policy). I&#8217;m not necessarily asking for a solu=
tion, but at least mentioning the issue.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"mso-ansi-language:EN-U=
S">--Bruno<o:p></o:p></span></p>
</div>
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From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
To: "Rakesh Gandhi (rgandhi)" <rgandhi@cisco.com>, "Chengli (Cheng Li)" <chengli13@huawei.com>
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From: "Aissaoui, Mustapha (Nokia - CA/Ottawa)" <mustapha.aissaoui@nokia.com>
To: "spring@ietf.org" <spring@ietf.org>
Thread-Topic: Codepoint for OSPFv3 protocol in SPRING LSP-Ping and LSP-Trace
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/yIpbRR4YfletXINsqMNfI1qvxTE>
Subject: [spring] Codepoint for OSPFv3 protocol in SPRING LSP-Ping and LSP-Trace
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Dear all,
I am not sure if this was discussed during the development of RFC 8287 - "L=
abel Switched Path (LSP) Ping/Traceroute for Segment Routing (SR) IGP-Prefi=
x and IGP-Adjacency Segment Identifiers (SIDs)                         with=
 MPLS Data Planes", but I could not find anything in the SPRING mail archiv=
e.

Prefix SID and adjacency SID which are originated in an OSPFv3 instance (IP=
v4 or IPv6 instance) do not have a protocol ID assigned to them in the Segm=
ent ID Sub-TLV, as well as in the Label Stack Sub-TLV of the Downstream Det=
ailed Mapping TLV.

Should we assign the next available IANA codepoint values or was there a ra=
tionale for omitting them?

Regards,
Mustapha.

--_000_DB6PR07MB4261FA8F2E8F6FBEB21B85DAE4DE0DB6PR07MB4261eurp_
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Dear all,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">I am not sure if this was discussed du=
ring the development of RFC 8287 &#8211; &#8220;Label Switched Path (LSP) P=
ing/Traceroute for Segment Routing (SR) IGP-Prefix and IGP-Adjacency
 Segment Identifiers (SIDs) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;with MPLS Data Planes&#8221;, but I could not find an=
ything in the SPRING mail archive.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Prefix SID and adjacency SID which are=
 originated in an OSPFv3 instance (IPv4 or IPv6 instance) do not have a pro=
tocol ID assigned to them in the Segment ID Sub-TLV,
 as well as in the Label Stack Sub-TLV of the Downstream Detailed Mapping T=
LV.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Should we assign the next available IA=
NA codepoint values or was there a rationale for omitting them?<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,sans-serif">Mustapha.<o:p></o:p></span></p>
</div>
</body>
</html>

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From: Xiejingrong <xiejingrong@huawei.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, SPRING WG List <spring@ietf.org>
Thread-Topic: draft-voyer-spring-sr-p2mp-policy-03
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Completely agree with Bruno.
I have raised similar comments on the list 3 weeks ago.


(1)     To let an SR Replication policy be a variant of an SR policy, SR-po=
licy framework should be inherited as much as possible.

(2)     Building of a tree is really outside the scope of the group.

(3)     If one want to have many names,  SR-P2MP, Tree-SID for the same thi=
ng "SR Replication Policy", I have no objection too.

(4)     But if the TreeSID means "Tree building" and bound to an SID, then =
it goes to (2).


Thanks
Jingrong

From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o=
range.com
Sent: Thursday, August 01, 2019 9:48 PM
To: SPRING WG List <spring@ietf.org>
Subject: [spring] draft-voyer-spring-sr-p2mp-policy-03

Hi authors,

You have requested WG adoption for draft-voyer-spring-sr-p2mp-policy
https://tools.ietf.org/html/draft-voyer-spring-sr-p2mp-policy-03

Reviewing the document, I'd like to propose a simplification along two dire=
ctions:

a)      Re-use the existing SR-policy framework as much as possible

b)      Define the SR replication policy only (aka spray) and make the Tree=
-SID as out of scope.

"a" would allow to simplify the text of the draft, enforces that the sr-pol=
icy framework is consistent, re-uses all existing behavior from SR-policy. =
In short, the SR replication policy may possibly be defined as replicating =
over N  SR-policies.
"b" would remove the specification of Tree-SID. I would argue that Tree-SID=
 is not adequately specified in this document, but rather left to the contr=
oller/PCE. Also the SPRING WG is not really chartered nor have the expertis=
e to define a specification creating a multicast tree (in particular the ha=
ndling of topology changes and the avoidance of loops). Note that you can s=
till introduce the Tree-SID name if you want, e.g. saying can one can built=
 one using one or multiple SR replication policies, but specifying that thi=
s is out of scope of this document.

Please let me know what you think about this.

On a side note, although this can be addressed after WG adoption, it would =
be good if the reader of the section "Security Considerations" had the impr=
ession that the security considerations have really been considered. E.g. t=
he policies been locally configured so it seems like there is room for conf=
iguring inconsistent policies on two nodes, creating a multicast forwarding=
 loops. (Unless may be if you provide enough restrictions in the specificat=
ion of the SR-replication policy). I'm not necessarily asking for a solutio=
n, but at least mentioning the issue.

Thanks,
Regards,
--Bruno

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Completely agree with Bruno.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">I have raised similar comments on the =
list 3 weeks ago.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:18.0pt;text-indent:-18.0=
pt;mso-list:l0 level1 lfo3">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D;mso-fareast-language:ZH-CN"><span style=3D"mso-list:Ignore">(1)<span=
 style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D;mso-fareast-language:ZH-CN">To let an SR Replication polic=
y be a variant of an SR policy, SR-policy framework should be inherited as =
much as possible.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:18.0pt;text-indent:-18.0=
pt;mso-list:l0 level1 lfo3">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D;mso-fareast-language:ZH-CN"><span style=3D"mso-list:Ignore">(2)<span=
 style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D;mso-fareast-language:ZH-CN">Building of a tree is really o=
utside the scope of the group.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:18.0pt;text-indent:-18.0=
pt;mso-list:l0 level1 lfo3">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D;mso-fareast-language:ZH-CN"><span style=3D"mso-list:Ignore">(3)<span=
 style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D;mso-fareast-language:ZH-CN">If one want to have many names=
, &nbsp;SR-P2MP, Tree-SID for the same thing &#8220;SR Replication Policy&#=
8221;, I have no objection too.<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"margin-left:18.0pt;text-indent:-18.0=
pt;mso-list:l0 level1 lfo3">
<![if !supportLists]><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#=
1F497D;mso-fareast-language:ZH-CN"><span style=3D"mso-list:Ignore">(4)<span=
 style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US" style=3D"font-size:10.5=
pt;color:#1F497D;mso-fareast-language:ZH-CN">But if the TreeSID means &#822=
0;Tree building&#8221; and bound to an SID, then it goes to (2).<o:p></o:p>=
</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Thanks<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN">Jingrong<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#1F497D;mso-fareast-language:ZH-CN"><o:p>&nbsp;</o:p></span></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"mso-fareast-languag=
e:ZH-CN">From:</span></b><span lang=3D"EN-US" style=3D"mso-fareast-language=
:ZH-CN"> spring [mailto:spring-bounces@ietf.org]
<b>On Behalf Of </b>bruno.decraene@orange.com<br>
<b>Sent:</b> Thursday, August 01, 2019 9:48 PM<br>
<b>To:</b> SPRING WG List &lt;spring@ietf.org&gt;<br>
<b>Subject:</b> [spring] draft-voyer-spring-sr-p2mp-policy-03<o:p></o:p></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi authors,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">You have requested WG adoption =
for draft-voyer-spring-sr-p2mp-policy<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><a href=3D"https://tools.ietf.o=
rg/html/draft-voyer-spring-sr-p2mp-policy-03">https://tools.ietf.org/html/d=
raft-voyer-spring-sr-p2mp-policy-03</a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Reviewing the document, I&#8217=
;d like to propose a simplification along two directions:<o:p></o:p></span>=
</p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-US"><span style=3D"mso-list:=
Ignore">a)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US">Re-use the existing SR-=
policy framework as much as possible<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-18.0pt;mso-list:l1 leve=
l1 lfo2"><![if !supportLists]><span lang=3D"EN-US"><span style=3D"mso-list:=
Ignore">b)<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;
</span></span></span><![endif]><span lang=3D"EN-US">Define the SR replicati=
on policy only (aka spray) and make the Tree-SID as out of scope.<o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&#8220;a&#8221; would allow to =
simplify the text of the draft, enforces that the sr-policy framework is co=
nsistent, re-uses all existing behavior from SR-policy. In short, the SR re=
plication policy may possibly be defined as replicating
 over N&nbsp; SR-policies.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">&#8220;b&#8221; would remove th=
e specification of Tree-SID. I would argue that Tree-SID is not adequately =
specified in this document, but rather left to the controller/PCE. Also the=
 SPRING WG is not really chartered nor have the
 expertise to define a specification creating a multicast tree (in particul=
ar the handling of topology changes and the avoidance of loops). Note that =
you can still introduce the Tree-SID name if you want, e.g. saying can one =
can built one using one or multiple
 SR replication policies, but specifying that this is out of scope of this =
document.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Please let me know what you thi=
nk about this.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">On a side note, although this c=
an be addressed after WG adoption, it would be good if the reader of the se=
ction &#8220;Security Considerations&#8221; had the impression that the sec=
urity considerations have really been considered.
 E.g. the policies been locally configured so it seems like there is room f=
or configuring inconsistent policies on two nodes, creating a multicast for=
warding loops. (Unless may be if you provide enough restrictions in the spe=
cification of the SR-replication
 policy). I&#8217;m not necessarily asking for a solution, but at least men=
tioning the issue.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">--Bruno<o:p></o:p></span></p>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
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<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
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<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] draft-ietf-spring-segment-routing-policy
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+ IDR WG since some of the affected documents are IDR WG drafts

Hi Bruno,

I agree that the draft-ietf-spring-segment-routing-policy [1] is the right =
place to normatively define the different segment types and perhaps would h=
ave been the right document to create an IANA registry for them.

I also agree that the draft-ietf-idr-segment-routing-te-policy [2] has a di=
screpancy between its IANA section 8.4 for the Segment-List sub-TLV space a=
nd section 2.4.3.2 (and it's sub-sections) where the different Segment Type=
s have been defined. I will request the authors of this draft to fix the te=
xt in section 2.4.3.2 (and it's sub-sections) for the types 8 and above to =
adjust for the codepoint 9 allocated for the weight sub-TLV.

At this point, given the implementations available and already deployed for=
 [2], I doubt if we can correct and map the segment types in that draft to =
what has been defined in [1].

There is also the https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distrib=
ution-11#section-9.7 which creates the Segment Types IANA registry (aligned=
 with [1]). And then I am not sure if draft-raza-spring-sr-policy-yang is a=
ble to benefit/leverage the IANA registry from [1].

So unless we can have the IANA registry created via [1] being consistently =
used in all dependent documents, I do not see much gain in setting up the S=
egment Type registry under IANA at this point.

Thanks,
Ketan

From: spring <spring-bounces@ietf.org> On Behalf Of bruno.decraene@orange.c=
om
Sent: 01 August 2019 19:10
To: SPRING WG List <spring@ietf.org>
Subject: [spring] draft-ietf-spring-segment-routing-policy

Hi authors,

Speaking as individual contributor.

This document seems to define multiple types of segments (1 to 11).
May be this document would be the right place to define them normatively an=
d creates the IANA registry for them. And this seems like a work for spring=
.
Otherwise, there is a risk that other documents redefine them, possibly in =
a non-consistent manner. (1) E.g.  the BGP draft is not using the same type=
 numbers/name, which may bring confusion. I would expect YANG models to als=
o need these types.
BTW is there any chance to align the types in the BGP document or is this t=
oo late? (alternatively may be changing the types in the sr-policy document=
)

Thanks,
Regards,
Bruno

(1)
SR-policy:

   Type 1: SR-MPLS Label:

   Type 2: SRv6 SID:

   Type 3: IPv4 Prefix with optional SR Algorithm:

   Type 4: IPv6 Global Prefix with optional SR Algorithm for SR-MPLS:

   Type 5: IPv4 Prefix with Local Interface ID:

   Type 6: IPv4 Addresses for link endpoints as Local, Remote pair:

   Type 7: IPv6 Prefix and Interface ID for link endpoints as Local, Remote=
 pair for SR-MPLS:

   Type 8: IPv6 Addresses for link endpoints as Local, Remote pair for SR-M=
PLS:

   Type 9: IPv6 Global Prefix with optional SR Algorithm for SRv6:

   Type 10: IPv6 Prefix and Interface ID for link endpoints as Local, Remot=
e pair for SRv6:

   Type 11: IPv6 Addresses for link endpoints as Local, Remote pair for SRv=
6:


BGP:
   1     MPLS SID sub-TLV                            This document
   2     SRv6 SID sub-TLV                            This document
   3     IPv4 Node and SID sub-TLV                   This document
   4     IPv6 Node and SID for SR-MPLS sub-TLV       This document
   5     IPv4 Node, index and SID sub-TLV            This document
   6     IPv4 Local/Remote addresses and SID sub-TLV This document
   7     IPv6 Node, index for remote and local pair  This document
         and SID for SR-MPLS sub-TLV
   8     IPv6 Local/Remote addresses and SID sub-TLV This document
   9     Weight sub-TLV                              This document
   10    IPv6 Node and SID for SRv6 sub-TLV          This document
   11    IPv6 Node, index for remote and local pair  This document
         and SID for SRv6 sub-TLV
   12    IPv6 Local/Remote addresses and SID for     This document
         SRv6 sub-TLV


___________________________________________________________________________=
______________________________________________



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Orange decline toute responsabilite si ce message a ete altere, deforme ou =
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</head>
<body lang=3D"EN-IN" link=3D"blue" vlink=3D"purple">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">&#43; IDR WG since some of the affected documents ar=
e IDR WG drafts<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Hi Bruno,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I agree that the draft-ietf-spring-segment-routing-p=
olicy [1] is the right place to normatively define the different segment ty=
pes and perhaps would have been the right document to create an IANA regist=
ry for them.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I also agree that the draft-ietf-idr-segment-routing=
-te-policy [2] has a discrepancy between its IANA section 8.4 for the Segme=
nt-List sub-TLV space and section 2.4.3.2 (and it&#8217;s sub-sections) whe=
re the different Segment Types have been
 defined. I will request the authors of this draft to fix the text in secti=
on 2.4.3.2 (and it&#8217;s sub-sections) for the types 8 and above to adjus=
t for the codepoint 9 allocated for the weight sub-TLV.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">At this point, given the implementations available a=
nd already deployed for [2], I doubt if we can correct and map the segment =
types in that draft to what has been defined in [1].<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">There is also the <a href=3D"https://tools.ietf.org/=
html/draft-ietf-idr-te-lsp-distribution-11#section-9.7">
https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distribution-11#section-9=
.7</a> which creates the Segment Types IANA registry (aligned with [1]). An=
d then I am not sure if draft-raza-spring-sr-policy-yang is able to benefit=
/leverage the IANA registry from
 [1].<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">So unless we can have the IANA registry created via =
[1] being consistently used in all dependent documents, I do not see much g=
ain in setting up the Segment Type registry under IANA at this point.<o:p><=
/o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal">Ketan<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"mso-fareast-languag=
e:EN-IN">From:</span></b><span lang=3D"EN-US" style=3D"mso-fareast-language=
:EN-IN"> spring &lt;spring-bounces@ietf.org&gt;
<b>On Behalf Of </b>bruno.decraene@orange.com<br>
<b>Sent:</b> 01 August 2019 19:10<br>
<b>To:</b> SPRING WG List &lt;spring@ietf.org&gt;<br>
<b>Subject:</b> [spring] draft-ietf-spring-segment-routing-policy<o:p></o:p=
></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi authors,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Speaking as individual contribu=
tor.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">This document seems to define m=
ultiple types of segments (1 to 11).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">May be this document would be t=
he right place to define them normatively and creates the IANA registry for=
 them. And this seems like a work for spring.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Otherwise, there is a risk that=
 other documents redefine them, possibly in a non-consistent manner. (1) E.=
g.&nbsp; the BGP draft is not using the same type numbers/name, which may b=
ring confusion. I would expect YANG models
 to also need these types.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">BTW is there any chance to alig=
n the types in the BGP document or is this too late? (alternatively may be =
changing the types in the sr-policy document)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thanks,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Bruno<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">(1)<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">SR-policy:<o:p></o:p></span></p=
>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 1: SR-MPLS Label:<o:p></o:p></s=
pan></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 2: SRv6 SID:<o:p></o:p></span><=
/pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 3: IPv4 Prefix with optional SR=
 Algorithm:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 4: IPv6 Global Prefix with opti=
onal SR Algorithm for SR-MPLS:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 5: IPv4 Prefix with Local Inter=
face ID:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 6: IPv4 Addresses for link endp=
oints as Local, Remote pair:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 7: IPv6 Prefix and Interface ID=
 for link endpoints as Local, Remote pair for SR-MPLS:<o:p></o:p></span></p=
re>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 8: IPv6 Addresses for link endp=
oints as Local, Remote pair for SR-MPLS:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 9: IPv6 Global Prefix with opti=
onal SR Algorithm for SRv6:<o:p></o:p></span></pre>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 10: IPv6 Prefix and Interface I=
D for link endpoints as Local, Remote pair for SRv6:<o:p></o:p></span></pre=
>
<pre><span lang=3D"EN-US">&nbsp;&nbsp; Type 11: IPv6 Addresses for link end=
points as Local, Remote pair for SRv6:<o:p></o:p></span></pre>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">BGP:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 1&nbsp=
;&nbsp;&nbsp;&nbsp; MPLS SID sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 2&nbsp=
;&nbsp;&nbsp;&nbsp; SRv6 SID sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 3&nbsp=
;&nbsp;&nbsp;&nbsp; IPv4 Node and SID sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp; This document<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 4&nbsp=
;&nbsp;&nbsp;&nbsp; IPv6 Node and SID for SR-MPLS sub-TLV&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; This document<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 5&nbsp=
;&nbsp;&nbsp;&nbsp; IPv4 Node, index and SID sub-TLV&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 6&nbsp=
;&nbsp;&nbsp;&nbsp; IPv4 Local/Remote addresses and SID sub-TLV This docume=
nt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 7&nbsp=
;&nbsp;&nbsp;&nbsp; IPv6 Node, index for remote and local pair&nbsp; This d=
ocument<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and SID for SR-MPLS sub-TLV<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 8&nbsp=
;&nbsp;&nbsp;&nbsp; IPv6 Local/Remote addresses and SID sub-TLV This docume=
nt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 9&nbsp=
;&nbsp;&nbsp;&nbsp; Weight sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This document<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp; &nbsp;10&nbs=
p;&nbsp;&nbsp; IPv6 Node and SID for SRv6 sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 11&nbs=
p;&nbsp;&nbsp; IPv6 Node, index for remote and local pair&nbsp; This docume=
nt<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and SID for SRv6 sub-TLV<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp; 12&nbs=
p;&nbsp;&nbsp; IPv6 Local/Remote addresses and SID for&nbsp;&nbsp;&nbsp;&nb=
sp; This document<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-=
family:&quot;Courier New&quot;;mso-fareast-language:FR">&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span><span lang=3D"FR" style=3D"font-size:10.0pt;font-family:&quot;Courie=
r New&quot;;mso-fareast-language:FR">SRv6 sub-TLV<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p>&nbsp;</o:p></span></p>
<pre><span lang=3D"FR">____________________________________________________=
_____________________________________________________________________<o:p><=
/o:p></span></pre>
<pre><span lang=3D"FR"><o:p>&nbsp;</o:p></span></pre>
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tion. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o=
:p></span></pre>
<pre><span lang=3D"FR">a l'expediteur et le detruire ainsi que les pieces j=
ointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o=
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<pre><span lang=3D"FR">Orange decline toute responsabilite si ce message a =
ete altere, deforme ou falsifie. Merci.<o:p></o:p></span></pre>
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Fri, 2 Aug 2019 12:46:03 -0400
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--000000000000c0752f058f25185c
Content-Type: text/plain; charset="UTF-8"

Dear All,
with this update, we've added a section on using BFD for Multipoint
Networks (RFC 8562 and RFC 8563) for proactive defect detection in
Point-to-Multipoint SR Policies.
Authors believe that the draft is stable and addresses p2p, as well as,
p2mp use cases of SR-MPLS. We appreciate your consideration of WG adoption
poll for this specification.

Regards,
Greg

---------- Forwarded message ---------
From: <internet-drafts@ietf.org>
Date: Fri, Aug 2, 2019 at 12:38 PM
Subject: New Version Notification for draft-mirsky-spring-bfd-08.txt
To: Ilya Varlashkin <ilya@nobulus.com>, Gregory Mirsky <
gregimirsky@gmail.com>, Ilya Varlashkin <Ilya@nobulus.com>, Jeff Tantsura <
jefftant.ietf@gmail.com>, Mach Chen (Guoyi) <mach.chen@huawei.com>



A new version of I-D, draft-mirsky-spring-bfd-08.txt
has been successfully submitted by Greg Mirsky and posted to the
IETF repository.

Name:           draft-mirsky-spring-bfd
Revision:       08
Title:          Bidirectional Forwarding Detection (BFD) in Segment Routing
Networks Using MPLS Dataplane
Document date:  2019-08-02
Group:          Individual Submission
Pages:          13
URL:
https://www.ietf.org/internet-drafts/draft-mirsky-spring-bfd-08.txt
Status:         https://datatracker.ietf.org/doc/draft-mirsky-spring-bfd/
Htmlized:       https://tools.ietf.org/html/draft-mirsky-spring-bfd-08
Htmlized:
https://datatracker.ietf.org/doc/html/draft-mirsky-spring-bfd
Diff:           https://www.ietf.org/rfcdiff?url2=draft-mirsky-spring-bfd-08

Abstract:
   Segment Routing (SR) architecture leverages the paradigm of source
   routing.  It can be realized in the Multiprotocol Label Switching
   (MPLS) network without any change to the data plane.  A segment is
   encoded as an MPLS label, and an ordered list of segments is encoded
   as a stack of labels.  Bidirectional Forwarding Detection (BFD) is
   expected to monitor any existing path between systems.  This document
   defines how to use Label Switched Path Ping to bootstrap a BFD
   session, control path in reverse direction of the SR-MPLS tunnel and
   applicability of BFD Demand mode in the SR-MPLS domain.




Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

--000000000000c0752f058f25185c
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Dear All,<div>with this update, we&#39;ve added a section =
on using BFD for Multipoint Networks (RFC 8562 and RFC 8563) for proactive =
defect detection in Point-to-Multipoint SR Policies.</div><div>Authors beli=
eve that the draft is stable and addresses p2p, as well as, p2mp use cases =
of SR-MPLS. We appreciate your consideration of WG adoption poll for this s=
pecification.</div><div><br></div><div>Regards,</div><div>Greg<br><br><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">---------- Forw=
arded message ---------<br>From: <span dir=3D"auto">&lt;<a href=3D"mailto:i=
nternet-drafts@ietf.org">internet-drafts@ietf.org</a>&gt;</span><br>Date: F=
ri, Aug 2, 2019 at 12:38 PM<br>Subject: New Version Notification for draft-=
mirsky-spring-bfd-08.txt<br>To: Ilya Varlashkin &lt;<a href=3D"mailto:ilya@=
nobulus.com">ilya@nobulus.com</a>&gt;, Gregory Mirsky &lt;<a href=3D"mailto=
:gregimirsky@gmail.com">gregimirsky@gmail.com</a>&gt;, Ilya Varlashkin &lt;=
<a href=3D"mailto:Ilya@nobulus.com">Ilya@nobulus.com</a>&gt;, Jeff Tantsura=
 &lt;<a href=3D"mailto:jefftant.ietf@gmail.com">jefftant.ietf@gmail.com</a>=
&gt;, Mach Chen (Guoyi) &lt;<a href=3D"mailto:mach.chen@huawei.com">mach.ch=
en@huawei.com</a>&gt;<br></div><br><br><br>
A new version of I-D, draft-mirsky-spring-bfd-08.txt<br>
has been successfully submitted by Greg Mirsky and posted to the<br>
IETF repository.<br>
<br>
Name:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0draft-mirsky-spring-bfd<br>
Revision:=C2=A0 =C2=A0 =C2=A0 =C2=A008<br>
Title:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Bidirectional Forwarding Detection=
 (BFD) in Segment Routing Networks Using MPLS Dataplane<br>
Document date:=C2=A0 2019-08-02<br>
Group:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Individual Submission<br>
Pages:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 13<br>
URL:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 <a href=3D"https://www.ietf.o=
rg/internet-drafts/draft-mirsky-spring-bfd-08.txt" rel=3D"noreferrer" targe=
t=3D"_blank">https://www.ietf.org/internet-drafts/draft-mirsky-spring-bfd-0=
8.txt</a><br>
Status:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.iet=
f.org/doc/draft-mirsky-spring-bfd/" rel=3D"noreferrer" target=3D"_blank">ht=
tps://datatracker.ietf.org/doc/draft-mirsky-spring-bfd/</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/=
draft-mirsky-spring-bfd-08" rel=3D"noreferrer" target=3D"_blank">https://to=
ols.ietf.org/html/draft-mirsky-spring-bfd-08</a><br>
Htmlized:=C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org=
/doc/html/draft-mirsky-spring-bfd" rel=3D"noreferrer" target=3D"_blank">htt=
ps://datatracker.ietf.org/doc/html/draft-mirsky-spring-bfd</a><br>
Diff:=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.o=
rg/rfcdiff?url2=3Ddraft-mirsky-spring-bfd-08" rel=3D"noreferrer" target=3D"=
_blank">https://www.ietf.org/rfcdiff?url2=3Ddraft-mirsky-spring-bfd-08</a><=
br>
<br>
Abstract:<br>
=C2=A0 =C2=A0Segment Routing (SR) architecture leverages the paradigm of so=
urce<br>
=C2=A0 =C2=A0routing.=C2=A0 It can be realized in the Multiprotocol Label S=
witching<br>
=C2=A0 =C2=A0(MPLS) network without any change to the data plane.=C2=A0 A s=
egment is<br>
=C2=A0 =C2=A0encoded as an MPLS label, and an ordered list of segments is e=
ncoded<br>
=C2=A0 =C2=A0as a stack of labels.=C2=A0 Bidirectional Forwarding Detection=
 (BFD) is<br>
=C2=A0 =C2=A0expected to monitor any existing path between systems.=C2=A0 T=
his document<br>
=C2=A0 =C2=A0defines how to use Label Switched Path Ping to bootstrap a BFD=
<br>
=C2=A0 =C2=A0session, control path in reverse direction of the SR-MPLS tunn=
el and<br>
=C2=A0 =C2=A0applicability of BFD Demand mode in the SR-MPLS domain.<br>
<br>
<br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
The IETF Secretariat<br>
<br>
</div></div></div>

--000000000000c0752f058f25185c--


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From: Rob Shakir <robjs@google.com>
Date: Sun, 4 Aug 2019 14:03:49 -0700
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To: SPRING WG List <spring@ietf.org>
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Subject: [spring] Beyond SRv6.
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Hi SPRING WG,

Over the last 5+ years, the IETF has developed Source Packet Routing in
NetworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) and
IPv6 (SRv6) data planes. SR-MPLS may also be transported over IP in UDP or
GRE.

These encapsulations are past WG last call (in IESG or RFC Editor).

During the SPRING WG meeting at IETF 105, two presentations were related to
the reduction of the size of the SID for IPv6 dataplane:

   -

   SRv6+ / CRH --
   https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04
   -

   uSID --
   https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-usid-01



During the IETF week, two additional drafts have been proposed:

   -

   https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00
   -

   https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03


As we expressed during the meeting, it is important for the WG to
understand what the aims of additional encapsulations are. Thus, we think
it is important that the WG should first get to a common understanding on
the requirements for a new IPv6 data plane with a smaller SID - both from
the perspective of operators that are looking to deploy these technologies,
and from that of the software/hardware implementation.

Therefore, we would like to solicit network operators interested in SR over
the IPv6 data plane to briefly introduce their:

   -

   use case (e.g. Fast Reroute, explicit routing/TE)
   -

   forwarding performance and scaling requirements
   -

      e.g., (number of nodes, network diameter, number of SID required in
      max and average). For the latter, if possible using both SRv6
128-bit SIDs
      and shorter (e.g. 32-bit) SIDs as the number would typically be different
      (*).
      -

   if the existing SRv6 approach is not deployable in their circumstances,
   details of the requirement of a different solution is required and whether
   this solution is needed for the short term only or for the long term.


As well as deployment limitations, we would like the SPRING community to
briefly describe the platform limitations that they are seeing which limit
the deployment of SRv6  In particular limitations related to the number of
SIDs which can be pushed and forwarded and how much the use of shorter SIDs
would improve the deployments .

For both of these sets of feedback if possible, please post this to the
SPRING WG. If the information cannot be shared publicly, please send it
directly to the chairs & AD (Martin).

This call for information will run for four weeks, up to 2019/09/03. As a
reminder, you can reach the SPRING chairs via spring-chairs@ietf.org and
ADs via spring-ads@ietf.org.

Thank you,

-- Rob & Bruno

(*) As expressed on the mailing list, a 128 bit SID can encode two
instructions a node SID and an adjacency SID hence less SID may be required.

--0000000000003dff62058f50eea5
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D""><span id=3D"gmail-=
docs-internal-guid-7c2e620c-7fff-3ced-50c2-1a2b627ac970" style=3D""><font f=
ace=3D"arial, sans-serif"><p dir=3D"ltr" style=3D"line-height:1.38;margin-t=
op:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,0);background-color:=
transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vert=
ical-align:baseline;white-space:pre-wrap">Hi SPRING WG,</span></p><br><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"color:rgb(0,0,0);background-color:transparent;font-variant-numeri=
c:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space=
:pre-wrap">Over the last 5+ years, the IETF has developed Source Packet Rou=
ting in NetworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS)=
 and IPv6 (SRv6) data planes. SR-MPLS may also be transported over IP in UD=
P or GRE.</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top=
:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,0);background-color:tr=
ansparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre-wrap">These encapsulations are past WG la=
st call (in IESG or RFC Editor).</span></p><br><p dir=3D"ltr" style=3D"line=
-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0=
,0);background-color:transparent;font-variant-numeric:normal;font-variant-e=
ast-asian:normal;vertical-align:baseline;white-space:pre-wrap">During the S=
PRING WG meeting at IETF 105, two presentations were related to the reducti=
on of the size of the SID for IPv6 dataplane:</span></p><ul style=3D"margin=
-top:0pt;margin-bottom:0pt"><li dir=3D"ltr" style=3D"list-style-type:disc;c=
olor:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;fo=
nt-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"background-color:transparent;font-variant-numeric:normal;font-var=
iant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">SRv6+ =
/ CRH -- </span><a href=3D"https://tools.ietf.org/html/draft-bonica-spring-=
srv6-plus-04" style=3D"text-decoration-line:none"><span style=3D"background=
-color:transparent;font-variant-numeric:normal;font-variant-east-asian:norm=
al;text-decoration-line:underline;vertical-align:baseline;white-space:pre-w=
rap">https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04</span></a=
></p></li><li dir=3D"ltr" style=3D"list-style-type:disc;color:rgb(0,0,0);ba=
ckground-color:transparent;font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre"><p dir=3D"ltr" style=3D=
"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"backgrou=
nd-color:transparent;font-variant-numeric:normal;font-variant-east-asian:no=
rmal;vertical-align:baseline;white-space:pre-wrap">uSID -- </span><a href=
=3D"https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv=
6-usid-01" style=3D"text-decoration-line:none"><span style=3D"background-co=
lor:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;=
text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap=
">https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-=
usid-01</span></a><span style=3D"background-color:transparent;font-variant-=
numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white=
-space:pre-wrap">=C2=A0</span></p></li></ul><br><p dir=3D"ltr" style=3D"lin=
e-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,=
0,0);background-color:transparent;font-variant-numeric:normal;font-variant-=
east-asian:normal;vertical-align:baseline;white-space:pre-wrap">During the =
IETF week, two additional drafts have been proposed:</span></p><ul style=3D=
"margin-top:0pt;margin-bottom:0pt"><li dir=3D"ltr" style=3D"list-style-type=
:disc;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:no=
rmal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre=
"><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt=
"><a href=3D"https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np=
-00" style=3D"text-decoration-line:none"><span style=3D"background-color:tr=
ansparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-d=
ecoration-line:underline;vertical-align:baseline;white-space:pre-wrap">http=
s://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00</span></a><sp=
an style=3D"background-color:transparent;font-variant-numeric:normal;font-v=
ariant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">=C2=
=A0</span></p></li><li dir=3D"ltr" style=3D"list-style-type:disc;color:rgb(=
0,0,0);background-color:transparent;font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir=3D"ltr"=
 style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href=3D"htt=
ps://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03" style=3D"text-=
decoration-line:none"><span style=3D"background-color:transparent;font-vari=
ant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:unde=
rline;vertical-align:baseline;white-space:pre-wrap">https://tools.ietf.org/=
html/draft-mirsky-6man-unified-id-sr-03</span></a><span style=3D"background=
-color:transparent;font-variant-numeric:normal;font-variant-east-asian:norm=
al;vertical-align:baseline;white-space:pre-wrap">=C2=A0</span></p></li></ul=
><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:=
0pt"><span style=3D"color:rgb(0,0,0);background-color:transparent;font-vari=
ant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;w=
hite-space:pre-wrap">As we expressed during the meeting, it is important fo=
r the WG to understand what the aims of additional encapsulations are. Thus=
, we think it is important that the WG should first get to a common underst=
anding on the requirements for a new IPv6 data plane with a smaller SID - b=
oth from the perspective of operators that are looking to deploy these tech=
nologies, and from that of the software/hardware implementation.</span></p>=
<br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0=
pt"><span style=3D"color:rgb(0,0,0);background-color:transparent;font-varia=
nt-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;wh=
ite-space:pre-wrap">Therefore, we would like to solicit network operators i=
nterested in SR over the IPv6 data plane to briefly introduce their:</span>=
</p><ul style=3D"margin-top:0pt;margin-bottom:0pt"><li dir=3D"ltr" style=3D=
"list-style-type:disc;color:rgb(0,0,0);background-color:transparent;font-va=
riant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline=
;white-space:pre"><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;m=
argin-bottom:0pt"><span style=3D"background-color:transparent;font-variant-=
numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white=
-space:pre-wrap">use case (e.g. Fast Reroute, explicit routing/TE)</span></=
p></li><li dir=3D"ltr" style=3D"list-style-type:disc;color:rgb(0,0,0);backg=
round-color:transparent;font-variant-numeric:normal;font-variant-east-asian=
:normal;vertical-align:baseline;white-space:pre"><p dir=3D"ltr" style=3D"li=
ne-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"background-=
color:transparent;font-variant-numeric:normal;font-variant-east-asian:norma=
l;vertical-align:baseline;white-space:pre-wrap">forwarding performance and =
scaling requirements</span></p></li><ul style=3D"margin-top:0pt;margin-bott=
om:0pt"><li dir=3D"ltr" style=3D"list-style-type:circle;color:rgb(0,0,0);ba=
ckground-color:transparent;font-variant-numeric:normal;font-variant-east-as=
ian:normal;vertical-align:baseline;white-space:pre"><p dir=3D"ltr" style=3D=
"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"backgrou=
nd-color:transparent;font-variant-numeric:normal;font-variant-east-asian:no=
rmal;vertical-align:baseline;white-space:pre-wrap">e.g., (number of nodes, =
network diameter, number of SID required in max and average). For the latte=
r, if possible using both SRv6 128-bit SIDs and shorter (e.g. 32-bit) SIDs =
as the number would typically be different (*).</span></p></li></ul><li dir=
=3D"ltr" style=3D"list-style-type:disc;color:rgb(0,0,0);background-color:tr=
ansparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertic=
al-align:baseline;white-space:pre"><p dir=3D"ltr" style=3D"line-height:1.38=
;margin-top:0pt;margin-bottom:0pt"><span style=3D"background-color:transpar=
ent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-ali=
gn:baseline;white-space:pre-wrap">if the existing SRv6 approach is not depl=
oyable in their circumstances, details of the requirement of a different so=
lution is required and whether this solution is needed for the short term o=
nly or for the long term.</span></p></li></ul><br><p dir=3D"ltr" style=3D"l=
ine-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(=
0,0,0);background-color:transparent;font-variant-numeric:normal;font-varian=
t-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">As well a=
s deployment limitations, we would like the SPRING community to briefly des=
cribe the platform limitations that they are seeing which limit the deploym=
ent of SRv6=C2=A0 In particular limitations related to the number of SIDs w=
hich can be pushed and forwarded and how much the use of shorter SIDs  woul=
d improve the deployments .</span></p><br><p dir=3D"ltr" style=3D"line-heig=
ht:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,0);b=
ackground-color:transparent;font-variant-numeric:normal;font-variant-east-a=
sian:normal;vertical-align:baseline;white-space:pre-wrap">For both of these=
 sets of feedback if possible, please post this to the SPRING WG. If the in=
formation cannot be shared publicly, please send it directly to the chairs =
&amp; AD (Martin).</span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;m=
argin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,0);background=
-color:transparent;font-variant-numeric:normal;font-variant-east-asian:norm=
al;vertical-align:baseline;white-space:pre-wrap">This call for information =
will run for four weeks, up to 2019/09/03. As a reminder, you can reach the=
 SPRING chairs via </span><a href=3D"mailto:spring-chairs@ietf.org" style=
=3D"text-decoration-line:none"><span style=3D"background-color:transparent;=
font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-=
line:underline;vertical-align:baseline;white-space:pre-wrap">spring-chairs@=
ietf.org</span></a><span style=3D"color:rgb(0,0,0);background-color:transpa=
rent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-al=
ign:baseline;white-space:pre-wrap"> and ADs via </span><a href=3D"mailto:sp=
ring-ads@ietf.org" style=3D"text-decoration-line:none"><span style=3D"backg=
round-color:transparent;font-variant-numeric:normal;font-variant-east-asian=
:normal;text-decoration-line:underline;vertical-align:baseline;white-space:=
pre-wrap">spring-ads@ietf.org</span></a><span style=3D"color:rgb(0,0,0);bac=
kground-color:transparent;font-variant-numeric:normal;font-variant-east-asi=
an:normal;vertical-align:baseline;white-space:pre-wrap">.=C2=A0</span></p><=
br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0p=
t"><span style=3D"color:rgb(0,0,0);background-color:transparent;font-varian=
t-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;whi=
te-space:pre-wrap">Thank you,</span></p><p dir=3D"ltr" style=3D"line-height=
:1.38;margin-top:0pt;margin-bottom:0pt"><span style=3D"color:rgb(0,0,0);bac=
kground-color:transparent;font-variant-numeric:normal;font-variant-east-asi=
an:normal;vertical-align:baseline;white-space:pre-wrap">-- Rob &amp; Bruno<=
/span></p><br><p dir=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margi=
n-bottom:0pt"><span style=3D"color:rgb(0,0,0);background-color:transparent;=
font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:b=
aseline;white-space:pre-wrap">(*) As expressed on the mailing list, a 128 b=
it SID can encode two instructions a node SID and an adjacency SID hence le=
ss SID may be required.</span></p></font></span><br class=3D"gmail-Apple-in=
terchange-newline"></div></div>

--0000000000003dff62058f50eea5--


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From: Rob Shakir <robjs@google.com>
Date: Sun, 4 Aug 2019 14:58:16 -0700
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Subject: [spring] IETF 105 Minutes Posted
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Hi SPRING,

Minutes from IETF 105 have been uploaded at
https://datatracker.ietf.org/meeting/105/materials/minutes-105-spring-00 --
thanks very much to PK for helping take these minutes.

If there are errors or corrections, please let me know and we'll upload a
revision.

Cheers,
r.

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">Hi SPRING,</div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:arial,helvetica,sans-serif">Minutes from IETF 105 h=
ave been uploaded at=C2=A0<a href=3D"https://datatracker.ietf.org/meeting/1=
05/materials/minutes-105-spring-00" style=3D"font-family:Arial,Helvetica,sa=
ns-serif">https://datatracker.ietf.org/meeting/105/materials/minutes-105-sp=
ring-00</a>=C2=A0-- thanks very much to PK for helping take these minutes.<=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,h=
elvetica,sans-serif">If there are errors or corrections, please let me know=
 and we&#39;ll upload a revision.</div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_d=
efault" style=3D"font-family:arial,helvetica,sans-serif">Cheers,</div><div =
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif">r.=
</div></div>

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From: Rob Shakir <robjs@google.com>
Date: Sun, 4 Aug 2019 15:02:52 -0700
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To: SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] WG Adoption Call: draft-guichard-spring-nsh-sr
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Folks,

IETF 105 got a little in the way of this call for adoption. Based on the
comments on the list, SPRING will adopt this document. Thanks to the
authors for their IPR positions.

Authors -- please submit this draft as a SPRING WG draft at your
convenience.

WG -- now this is a WG document, it'd be great to see technical reviews of
it on the list.

Cheers,
r.

On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com> wrote:

> Hi SPRING WG,
>
> This email initiates a two week working group adoption call for
> draft-guichard-spring-nsh-sr. This follows the discussion that we had in
> the last few IETF meetings, and particularly the focused discussion we had
> at IETF 104 regarding service chaining and SPRING.
>
> Please indicate your support, comments, or objections for adopting this
> draft by *Wednesday July 10th, 2019.* We are particularly interested in
> hearing from WG members who are not authors of this draft, and those folks
> that are willing to spend time working on this draft after adoption.
>
> We are also looking for volunteers who can provide a technical review of
> the content of the draft at a later stage of its progress through the
> working group (e.g., before WGLC).
>
> In parallel - we'll send an IPR poll to the working group and authors. The
> currently disclosed IPR can be found in the datatracker
> <https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-guichard-spring-nsh-sr>
> .
>
> Thanks!
> Rob & Bruno.
>
>
>

--0000000000006ecce8058f51c131
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">Folks,</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif">IETF 105 got a little in th=
e way of this call for adoption. Based on the comments on the list, SPRING =
will adopt this document. Thanks to the authors for their IPR positions.</d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif">Authors -- please submit this draft as a SPRING WG draft=
 at your convenience.</div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif">WG -- now this is a WG document=
, it&#39;d be great to see technical reviews of it on the list.</div><div c=
lass=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif"><br=
></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif">Cheers,</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif">r.</div></div><br><div class=3D"gmail_quote"><div=
 dir=3D"ltr" class=3D"gmail_attr">On Wed, Jun 26, 2019 at 11:13 PM Rob Shak=
ir &lt;<a href=3D"mailto:robjs@google.com">robjs@google.com</a>&gt; wrote:<=
br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8e=
x;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"=
><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-ser=
if">Hi SPRING WG,</div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=3D"f=
ont-family:arial,helvetica,sans-serif">This email initiates a two week work=
ing group adoption call for draft-guichard-spring-nsh-sr. This follows the =
discussion that we had in the last few IETF meetings, and particularly the =
focused discussion we had at IETF 104 regarding service chaining and SPRING=
.</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sa=
ns-serif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial=
,helvetica,sans-serif">Please indicate your support, comments, or objection=
s for adopting this draft by <b>Wednesday July 10th, 2019.</b>=C2=A0We are =
particularly interested in hearing from WG members who are not authors of t=
his draft, and those folks that are willing to spend time working on this d=
raft after adoption.</div><div class=3D"gmail_default" style=3D"font-family=
:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=
=3D"font-family:arial,helvetica,sans-serif">We are also looking for volunte=
ers who can provide a technical review of the content of the draft at a lat=
er stage of its progress through the working group (e.g., before WGLC).</di=
v><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-se=
rif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,helv=
etica,sans-serif">In parallel - we&#39;ll send an IPR poll to the working g=
roup and authors. The currently disclosed IPR can be found in the <a href=
=3D"https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&amp;id=3Ddraft-=
guichard-spring-nsh-sr" target=3D"_blank">datatracker</a>.</div><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif"><br></d=
iv><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-s=
erif">Thanks!</div><div class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif">Rob &amp; Bruno.</div><div class=3D"gmail_default" st=
yle=3D"font-family:arial,helvetica,sans-serif"><br></div><div class=3D"gmai=
l_default" style=3D"font-family:arial,helvetica,sans-serif"><br></div></div=
>
</blockquote></div>

--0000000000006ecce8058f51c131--


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From: Rob Shakir <robjs@google.com>
Date: Sun, 4 Aug 2019 15:12:22 -0700
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Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming
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SPRING,

Thanks for the review of this document. As with the other
document, apologies for the delay in following up. Based on the mailing
list replies, SPRING will adopt this document *once the IPR poll has been
completed*.

Authors - the following contributors have not yet responded to the IPR poll:

   - D Steinberg
   - G Dawra
   - S Bryant
   - H Assarpour
   - H Shah
   - L Contreras
   - J Tantsura
   - M Vigoureux

We can't make a more pointed follow up as these contributors do not have
their addresses listed in this draft, whilst not required -- they are
appreciated for us to be able to follow up on those that have contributed
material to drafts. Your assistance with following up here would be greatly
appreciated.

Thanks,
r.

On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com> wrote:

> Hi SPRING WG,
>
> This email initiates a two week working group adoption call for
> draft-xuclad-spring-sr-service-programming. This follows the discussion
> that we had in the last few IETF meetings, and particularly the focused
> discussion we had at IETF 104 regarding service chaining and SPRING.
>
> Please indicate your support, comments, or objections for adopting this
> draft by *Wednesday July 10th, 2019.* We are particularly interested in
> hearing from WG members who are not authors of this draft, and those folks
> that are willing to spend time working on this draft after adoption.
>
> We are also looking for volunteers who can provide a technical review of
> the content of the draft at a later stage of its progress through the
> working group (e.g., before WGLC).
>
> In parallel - we'll send an IPR poll to the working group and authors. The
> currently disclosed IPR can be found in the datatracker
> <https://datatracker.ietf.org/ipr/search/?submit=draft&id=draft-xuclad-spring-sr-service-programming>
> .
>
> Thanks!
> Rob & Bruno.
>

--00000000000069bfb5058f51e313
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">SPRING,<br></div><div class=3D"gmail_default" style=3D"=
font-family:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_defau=
lt" style=3D"font-family:arial,helvetica,sans-serif">Thanks for the review =
of this document. As with the other document,=C2=A0apologies for the delay =
in following up. Based on the mailing list replies, SPRING will adopt this =
document <b>once the IPR poll has been completed</b>.</div><div class=3D"gm=
ail_default" style=3D"font-family:arial,helvetica,sans-serif"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif">=
Authors - the following contributors have not yet responded=C2=A0to the IPR=
 poll:</div><div class=3D"gmail_default" style=3D"font-family:arial,helveti=
ca,sans-serif"><ul><li>D Steinberg</li><li>G Dawra</li><li>S Bryant</li><li=
>H Assarpour</li><li>H Shah</li><li>L Contreras</li><li>J Tantsura</li><li>=
M Vigoureux</li></ul><div>We can&#39;t make=C2=A0a more pointed follow up a=
s these contributors do not have their=C2=A0addresses listed in this draft,=
 whilst not required -- they are appreciated for us to be able to follow up=
 on those that have contributed material to drafts. Your assistance with fo=
llowing up here would be=C2=A0greatly appreciated.</div><div><br></div><div=
>Thanks,</div><div>r.</div></div></div><br><div class=3D"gmail_quote"><div =
dir=3D"ltr" class=3D"gmail_attr">On Wed, Jun 26, 2019 at 11:13 PM Rob Shaki=
r &lt;<a href=3D"mailto:robjs@google.com">robjs@google.com</a>&gt; wrote:<b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">=
<div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-seri=
f"><div class=3D"gmail_default">Hi SPRING WG,</div><div class=3D"gmail_defa=
ult"><br></div><div class=3D"gmail_default">This email initiates a two week=
 working group adoption call for draft-xuclad-spring-sr-service-programming=
. This follows the discussion that we had in the last few IETF meetings, an=
d particularly the focused discussion we had at IETF 104 regarding service =
chaining and SPRING.</div><div class=3D"gmail_default"><br></div><div class=
=3D"gmail_default">Please indicate your support, comments, or objections fo=
r adopting this draft by <b>Wednesday July 10th, 2019.</b>=C2=A0We are part=
icularly interested in hearing from WG members who are not authors of this =
draft, and those folks that are willing to spend time working on this draft=
 after adoption.</div><div class=3D"gmail_default"><br></div><div class=3D"=
gmail_default">We are also looking for volunteers who can provide a technic=
al review of the content of the draft at a later stage of its progress thro=
ugh the working group (e.g., before WGLC).</div><div class=3D"gmail_default=
"><br></div><div class=3D"gmail_default">In parallel - we&#39;ll send an IP=
R poll to the working group and authors. The currently disclosed IPR can be=
 found in the=C2=A0<a href=3D"https://datatracker.ietf.org/ipr/search/?subm=
it=3Ddraft&amp;id=3Ddraft-xuclad-spring-sr-service-programming" target=3D"_=
blank">datatracker</a>.</div><div class=3D"gmail_default"><br></div><div cl=
ass=3D"gmail_default">Thanks!</div><div class=3D"gmail_default">Rob &amp; B=
runo.</div><div class=3D"gmail_default"></div></div></div>
</blockquote></div>

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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/4LFqswJckmWkwQQYElldSkErS4A>
Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming
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Rob,

I=E2=80=99m not aware of any IPR besides that already disclosed.

Regards,
Jeff

> On Aug 4, 2019, at 15:12, Rob Shakir <robjs=3D40google.com@dmarc.ietf.org>=
 wrote:
>=20
> SPRING,
>=20
> Thanks for the review of this document. As with the other document, apolog=
ies for the delay in following up. Based on the mailing list replies, SPRING=
 will adopt this document once the IPR poll has been completed.
>=20
> Authors - the following contributors have not yet responded to the IPR pol=
l:
> D Steinberg
> G Dawra
> S Bryant
> H Assarpour
> H Shah
> L Contreras
> J Tantsura
> M Vigoureux
> We can't make a more pointed follow up as these contributors do not have t=
heir addresses listed in this draft, whilst not required -- they are appreci=
ated for us to be able to follow up on those that have contributed material t=
o drafts. Your assistance with following up here would be greatly appreciate=
d.
>=20
> Thanks,
> r.
>=20
>> On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com> wrote:
>> Hi SPRING WG,
>>=20
>> This email initiates a two week working group adoption call for draft-xuc=
lad-spring-sr-service-programming.. This follows the discussion that we had i=
n the last few IETF meetings, and particularly the focused discussion we had=
 at IETF 104 regarding service chaining and SPRING.
>>=20
>> Please indicate your support, comments, or objections for adopting this d=
raft by Wednesday July 10th, 2019. We are particularly interested in hearing=
 from WG members who are not authors of this draft, and those folks that are=
 willing to spend time working on this draft after adoption.
>>=20
>> We are also looking for volunteers who can provide a technical review of t=
he content of the draft at a later stage of its progress through the working=
 group (e.g., before WGLC).
>>=20
>> In parallel - we'll send an IPR poll to the working group and authors. Th=
e currently disclosed IPR can be found in the datatracker.
>>=20
>> Thanks!
>> Rob & Bruno.
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Rob,<div><br></div><div>I=E2=80=99m not awa=
re of any IPR besides that already disclosed.<br><br><div id=3D"AppleMailSig=
nature" dir=3D"ltr">Regards,<div>Jeff</div></div><div dir=3D"ltr"><br>On Aug=
 4, 2019, at 15:12, Rob Shakir &lt;<a href=3D"mailto:robjs=3D40google.com@dm=
arc.ietf.org">robjs=3D40google.com@dmarc.ietf.org</a>&gt; wrote:<br><br></di=
v><blockquote type=3D"cite"><div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"=
gmail_default" style=3D"font-family:arial,helvetica,sans-serif">SPRING,<br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-=
serif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif">Thanks for the review of this document. As with the other=
 document,&nbsp;apologies for the delay in following up. Based on the mailin=
g list replies, SPRING will adopt this document <b>once the IPR poll has bee=
n completed</b>.</div><div class=3D"gmail_default" style=3D"font-family:aria=
l,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=3D"font=
-family:arial,helvetica,sans-serif">Authors - the following contributors hav=
e not yet responded&nbsp;to the IPR poll:</div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif"><ul><li>D Steinberg</li><li>=
G Dawra</li><li>S Bryant</li><li>H Assarpour</li><li>H Shah</li><li>L Contre=
ras</li><li>J Tantsura</li><li>M Vigoureux</li></ul><div>We can't make&nbsp;=
a more pointed follow up as these contributors do not have their&nbsp;addres=
ses listed in this draft, whilst not required -- they are appreciated for us=
 to be able to follow up on those that have contributed material to drafts. Y=
our assistance with following up here would be&nbsp;greatly appreciated.</di=
v><div><br></div><div>Thanks,</div><div>r.</div></div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jun 26, 2019 at 1=
1:13 PM Rob Shakir &lt;<a href=3D"mailto:robjs@google.com">robjs@google.com<=
/a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><di=
v dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,helvet=
ica,sans-serif"><div class=3D"gmail_default">Hi SPRING WG,</div><div class=3D=
"gmail_default"><br></div><div class=3D"gmail_default">This email initiates a=
 two week working group adoption call for draft-xuclad-spring-sr-service-pro=
gramming.. This follows the discussion that we had in the last few IETF meet=
ings, and particularly the focused discussion we had at IETF 104 regarding s=
ervice chaining and SPRING.</div><div class=3D"gmail_default"><br></div><div=
 class=3D"gmail_default">Please indicate your support, comments, or objectio=
ns for adopting this draft by <b>Wednesday July 10th, 2019.</b>&nbsp;We are p=
articularly interested in hearing from WG members who are not authors of thi=
s draft, and those folks that are willing to spend time working on this draf=
t after adoption.</div><div class=3D"gmail_default"><br></div><div class=3D"=
gmail_default">We are also looking for volunteers who can provide a technica=
l review of the content of the draft at a later stage of its progress throug=
h the working group (e.g., before WGLC).</div><div class=3D"gmail_default"><=
br></div><div class=3D"gmail_default">In parallel - we'll send an IPR poll t=
o the working group and authors. The currently disclosed IPR can be found in=
 the&nbsp;<a href=3D"https://datatracker.ietf.org/ipr/search/?submit=3Ddraft=
&amp;id=3Ddraft-xuclad-spring-sr-service-programming" target=3D"_blank">data=
tracker</a>.</div><div class=3D"gmail_default"><br></div><div class=3D"gmail=
_default">Thanks!</div><div class=3D"gmail_default">Rob &amp; Bruno.</div><d=
iv class=3D"gmail_default"></div></div></div>
</blockquote></div>
</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>________=
_______________________________________</span><br><span>spring mailing list<=
/span><br><span><a href=3D"mailto:spring@ietf.org">spring@ietf.org</a></span=
><br><span><a href=3D"https://www.ietf.org/mailman/listinfo/spring">https://=
www.ietf.org/mailman/listinfo/spring</a></span><br></div></blockquote></div>=
</body></html>=

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From: Gaurav Dawra <gdawra.ietf@gmail.com>
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Date: Sun, 4 Aug 2019 22:00:38 -0700
Cc: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>
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To: Jeff Tantsura <jefftant.ietf@gmail.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/nq4mY9GAEDmzkJ1qNRBNoJdUE44>
Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming
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Rob,

I am not aware of any IPR than what already disclosed.

Gaurav

Sent from my iPhone

> On Aug 4, 2019, at 9:06 PM, Jeff Tantsura <jefftant.ietf@gmail.com> wrote:=

>=20
> Rob,
>=20
> I=E2=80=99m not aware of any IPR besides that already disclosed.
>=20
> Regards,
> Jeff
>=20
>> On Aug 4, 2019, at 15:12, Rob Shakir <robjs=3D40google.com@dmarc.ietf.org=
> wrote:
>>=20
>> SPRING,
>>=20
>> Thanks for the review of this document. As with the other document, apolo=
gies for the delay in following up. Based on the mailing list replies, SPRIN=
G will adopt this document once the IPR poll has been completed.
>>=20
>> Authors - the following contributors have not yet responded to the IPR po=
ll:
>> D Steinberg
>> G Dawra
>> S Bryant
>> H Assarpour
>> H Shah
>> L Contreras
>> J Tantsura
>> M Vigoureux
>> We can't make a more pointed follow up as these contributors do not have t=
heir addresses listed in this draft, whilst not required -- they are appreci=
ated for us to be able to follow up on those that have contributed material t=
o drafts. Your assistance with following up here would be greatly appreciate=
d.
>>=20
>> Thanks,
>> r.
>>=20
>>> On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com> wrote:
>>> Hi SPRING WG,
>>>=20
>>> This email initiates a two week working group adoption call for draft-xu=
clad-spring-sr-service-programming.. This follows the discussion that we had=
 in the last few IETF meetings, and particularly the focused discussion we h=
ad at IETF 104 regarding service chaining and SPRING.
>>>=20
>>> Please indicate your support, comments, or objections for adopting this d=
raft by Wednesday July 10th, 2019. We are particularly interested in hearing=
 from WG members who are not authors of this draft, and those folks that are=
 willing to spend time working on this draft after adoption.
>>>=20
>>> We are also looking for volunteers who can provide a technical review of=
 the content of the draft at a later stage of its progress through the worki=
ng group (e.g., before WGLC).
>>>=20
>>> In parallel - we'll send an IPR poll to the working group and authors. T=
he currently disclosed IPR can be found in the datatracker.
>>>=20
>>> Thanks!
>>> Rob & Bruno.
>> _______________________________________________
>> spring mailing list
>> spring@ietf.org
>> https://www.ietf.org/mailman/listinfo/spring
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Rob,<div><br><div>I am not aware of any IPR=
 than what already disclosed.</div><div><br></div><div>Gaurav<br><br><div id=
=3D"AppleMailSignature" dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr=
"><br>On Aug 4, 2019, at 9:06 PM, Jeff Tantsura &lt;<a href=3D"mailto:jeffta=
nt.ietf@gmail.com">jefftant.ietf@gmail.com</a>&gt; wrote:<br><br></div><bloc=
kquote type=3D"cite"><div dir=3D"ltr"><meta http-equiv=3D"content-type" cont=
ent=3D"text/html; charset=3Dutf-8">Rob,<div><br></div><div>I=E2=80=99m not a=
ware of any IPR besides that already disclosed.<br><br><div id=3D"AppleMailS=
ignature" dir=3D"ltr">Regards,<div>Jeff</div></div><div dir=3D"ltr"><br>On A=
ug 4, 2019, at 15:12, Rob Shakir &lt;<a href=3D"mailto:robjs=3D40google.com@=
dmarc.ietf.org">robjs=3D40google.com@dmarc.ietf.org</a>&gt; wrote:<br><br></=
div><blockquote type=3D"cite"><div dir=3D"ltr"><div dir=3D"ltr"><div class=3D=
"gmail_default" style=3D"font-family:arial,helvetica,sans-serif">SPRING,<br>=
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif"><br></div><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">Thanks for the review of this document. As with the othe=
r document,&nbsp;apologies for the delay in following up. Based on the maili=
ng list replies, SPRING will adopt this document <b>once the IPR poll has be=
en completed</b>.</div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif"><br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif">Authors - the following contributors ha=
ve not yet responded&nbsp;to the IPR poll:</div><div class=3D"gmail_default"=
 style=3D"font-family:arial,helvetica,sans-serif"><ul><li>D Steinberg</li><l=
i>G Dawra</li><li>S Bryant</li><li>H Assarpour</li><li>H Shah</li><li>L Cont=
reras</li><li>J Tantsura</li><li>M Vigoureux</li></ul><div>We can't make&nbs=
p;a more pointed follow up as these contributors do not have their&nbsp;addr=
esses listed in this draft, whilst not required -- they are appreciated for u=
s to be able to follow up on those that have contributed material to drafts.=
 Your assistance with following up here would be&nbsp;greatly appreciated.</=
div><div><br></div><div>Thanks,</div><div>r.</div></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jun 26, 2019 a=
t 11:13 PM Rob Shakir &lt;<a href=3D"mailto:robjs@google.com">robjs@google.c=
om</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,hel=
vetica,sans-serif"><div class=3D"gmail_default">Hi SPRING WG,</div><div clas=
s=3D"gmail_default"><br></div><div class=3D"gmail_default">This email initia=
tes a two week working group adoption call for draft-xuclad-spring-sr-servic=
e-programming.. This follows the discussion that we had in the last few IETF=
 meetings, and particularly the focused discussion we had at IETF 104 regard=
ing service chaining and SPRING.</div><div class=3D"gmail_default"><br></div=
><div class=3D"gmail_default">Please indicate your support, comments, or obj=
ections for adopting this draft by <b>Wednesday July 10th, 2019.</b>&nbsp;We=
 are particularly interested in hearing from WG members who are not authors o=
f this draft, and those folks that are willing to spend time working on this=
 draft after adoption.</div><div class=3D"gmail_default"><br></div><div clas=
s=3D"gmail_default">We are also looking for volunteers who can provide a tec=
hnical review of the content of the draft at a later stage of its progress t=
hrough the working group (e.g., before WGLC).</div><div class=3D"gmail_defau=
lt"><br></div><div class=3D"gmail_default">In parallel - we'll send an IPR p=
oll to the working group and authors. The currently disclosed IPR can be fou=
nd in the&nbsp;<a href=3D"https://datatracker.ietf.org/ipr/search/?submit=3D=
draft&amp;id=3Ddraft-xuclad-spring-sr-service-programming" target=3D"_blank"=
>datatracker</a>.</div><div class=3D"gmail_default"><br></div><div class=3D"=
gmail_default">Thanks!</div><div class=3D"gmail_default">Rob &amp; Bruno.</d=
iv><div class=3D"gmail_default"></div></div></div>
</blockquote></div>
</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>________=
_______________________________________</span><br><span>spring mailing list<=
/span><br><span><a href=3D"mailto:spring@ietf.org">spring@ietf.org</a></span=
><br><span><a href=3D"https://www.ietf.org/mailman/listinfo/spring">https://=
www.ietf.org/mailman/listinfo/spring</a></span><br></div></blockquote></div>=
</div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>________=
_______________________________________</span><br><span>spring mailing list<=
/span><br><span><a href=3D"mailto:spring@ietf.org">spring@ietf.org</a></span=
><br><span><a href=3D"https://www.ietf.org/mailman/listinfo/spring">https://=
www.ietf.org/mailman/listinfo/spring</a></span><br></div></blockquote></div>=
</div></body></html>=

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From: "Shah, Himanshu" <hshah@ciena.com>
To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, "draft-xuclad-spring-sr-service-programming@ietf.org" <draft-xuclad-spring-sr-service-programming@ietf.org>, SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] [**EXTERNAL**] IPR Poll: draft-xuclad-spring-sr-service-programming
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From: "Luis M. Contreras" <contreras.ietf@gmail.com>
Date: Mon, 5 Aug 2019 18:20:59 +0200
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To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>
Cc: SPRING WG List <spring@ietf.org>,  LUIS MIGUEL CONTRERAS MURILLO <luismiguel.contrerasmurillo@telefonica.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/Mf27AWpr61uQTSGLWGnaOJt5N6M>
Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming
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--000000000000e66ac7058f6118a4
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Hi all,

I'm not aware of any IPR relates to this draft apart from the already
disclosed.


Best regards

Luis

El lun., 5 ago. 2019 0:12, Rob Shakir <robjs=3D40google.com@dmarc.ietf.org>
escribi=C3=B3:

> SPRING,
>
> Thanks for the review of this document. As with the other
> document, apologies for the delay in following up. Based on the mailing
> list replies, SPRING will adopt this document *once the IPR poll has been
> completed*.
>
> Authors - the following contributors have not yet responded to the IPR
> poll:
>
>    - D Steinberg
>    - G Dawra
>    - S Bryant
>    - H Assarpour
>    - H Shah
>    - L Contreras
>    - J Tantsura
>    - M Vigoureux
>
> We can't make a more pointed follow up as these contributors do not have
> their addresses listed in this draft, whilst not required -- they are
> appreciated for us to be able to follow up on those that have contributed
> material to drafts. Your assistance with following up here would be great=
ly
> appreciated.
>
> Thanks,
> r.
>
> On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com> wrote:
>
>> Hi SPRING WG,
>>
>> This email initiates a two week working group adoption call for
>> draft-xuclad-spring-sr-service-programming.. This follows the discussion
>> that we had in the last few IETF meetings, and particularly the focused
>> discussion we had at IETF 104 regarding service chaining and SPRING.
>>
>> Please indicate your support, comments, or objections for adopting this
>> draft by *Wednesday July 10th, 2019.* We are particularly interested in
>> hearing from WG members who are not authors of this draft, and those fol=
ks
>> that are willing to spend time working on this draft after adoption.
>>
>> We are also looking for volunteers who can provide a technical review of
>> the content of the draft at a later stage of its progress through the
>> working group (e.g., before WGLC).
>>
>> In parallel - we'll send an IPR poll to the working group and authors.
>> The currently disclosed IPR can be found in the datatracker
>> <https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&id=3Ddraft-xucl=
ad-spring-sr-service-programming>
>> .
>>
>> Thanks!
>> Rob & Bruno.
>>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>

--000000000000e66ac7058f6118a4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">Hi all,<div dir=3D"auto"><br></div><div dir=3D"auto">I&#3=
9;m not aware of any IPR relates to this draft apart from the already discl=
osed.</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Best regards</div><div dir=3D"auto"><br></div><div dir=3D"auto">L=
uis</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gma=
il_attr">El lun., 5 ago. 2019 0:12, Rob Shakir &lt;robjs=3D<a href=3D"mailt=
o:40google.com@dmarc.ietf.org">40google.com@dmarc.ietf.org</a>&gt; escribi=
=C3=B3:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif">SPRING,=
<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif"><br></div><div class=3D"gmail_default" style=3D"font-family:ar=
ial,helvetica,sans-serif">Thanks for the review of this document. As with t=
he other document,=C2=A0apologies for the delay in following up. Based on t=
he mailing list replies, SPRING will adopt this document <b>once the IPR po=
ll has been completed</b>.</div><div class=3D"gmail_default" style=3D"font-=
family:arial,helvetica,sans-serif"><br></div><div class=3D"gmail_default" s=
tyle=3D"font-family:arial,helvetica,sans-serif">Authors - the following con=
tributors have not yet responded=C2=A0to the IPR poll:</div><div class=3D"g=
mail_default" style=3D"font-family:arial,helvetica,sans-serif"><ul><li>D St=
einberg</li><li>G Dawra</li><li>S Bryant</li><li>H Assarpour</li><li>H Shah=
</li><li>L Contreras</li><li>J Tantsura</li><li>M Vigoureux</li></ul><div>W=
e can&#39;t make=C2=A0a more pointed follow up as these contributors do not=
 have their=C2=A0addresses listed in this draft, whilst not required -- the=
y are appreciated for us to be able to follow up on those that have contrib=
uted material to drafts. Your assistance with following up here would be=C2=
=A0greatly appreciated.</div><div><br></div><div>Thanks,</div><div>r.</div>=
</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_=
attr">On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir &lt;<a href=3D"mailto:rob=
js@google.com" target=3D"_blank" rel=3D"noreferrer">robjs@google.com</a>&gt=
; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px=
 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div di=
r=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif"><div class=3D"gmail_default">Hi SPRING WG,</div><div class=3D"=
gmail_default"><br></div><div class=3D"gmail_default">This email initiates =
a two week working group adoption call for draft-xuclad-spring-sr-service-p=
rogramming.. This follows the discussion that we had in the last few IETF m=
eetings, and particularly the focused discussion we had at IETF 104 regardi=
ng service chaining and SPRING.</div><div class=3D"gmail_default"><br></div=
><div class=3D"gmail_default">Please indicate your support, comments, or ob=
jections for adopting this draft by <b>Wednesday July 10th, 2019.</b>=C2=A0=
We are particularly interested in hearing from WG members who are not autho=
rs of this draft, and those folks that are willing to spend time working on=
 this draft after adoption.</div><div class=3D"gmail_default"><br></div><di=
v class=3D"gmail_default">We are also looking for volunteers who can provid=
e a technical review of the content of the draft at a later stage of its pr=
ogress through the working group (e.g., before WGLC).</div><div class=3D"gm=
ail_default"><br></div><div class=3D"gmail_default">In parallel - we&#39;ll=
 send an IPR poll to the working group and authors. The currently disclosed=
 IPR can be found in the=C2=A0<a href=3D"https://datatracker.ietf.org/ipr/s=
earch/?submit=3Ddraft&amp;id=3Ddraft-xuclad-spring-sr-service-programming" =
target=3D"_blank" rel=3D"noreferrer">datatracker</a>.</div><div class=3D"gm=
ail_default"><br></div><div class=3D"gmail_default">Thanks!</div><div class=
=3D"gmail_default">Rob &amp; Bruno.</div><div class=3D"gmail_default"></div=
></div></div>
</blockquote></div>
_______________________________________________<br>
spring mailing list<br>
<a href=3D"mailto:spring@ietf.org" target=3D"_blank" rel=3D"noreferrer">spr=
ing@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/spring" rel=3D"noreferrer =
noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/spring<=
/a><br>
</blockquote></div>

--000000000000e66ac7058f6118a4--


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From: Dirk Steinberg <dirk@lapishills.com>
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Date: Mon, 5 Aug 2019 20:30:09 +0300
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Hi,
=20
I am not aware of any IPR regarding this draft.
=20
Best
Dirk Steinberg


> From: spring <spring-bounces@ietf.org =
<mailto:spring-bounces@ietf.org>> on behalf of Rob Shakir =
<robjs=3D40google.com@dmarc.ietf.org =
<mailto:robjs=3D40google.com@dmarc.ietf.org>>
> Date: Sunday, August 4, 2019 at 6:13 PM
> To: SPRING WG List <spring@ietf.org <mailto:spring@ietf.org>>
> Subject: Re: [spring] WG Adoption Call: =
draft-xuclad-spring-sr-service-programming
> =20
> SPRING,
> =20
> Thanks for the review of this document. As with the other document, =
apologies for the delay in following up. Based on the mailing list =
replies, SPRING will adopt this document once the IPR poll has been =
completed.
> =20
> Authors - the following contributors have not yet responded to the IPR =
poll:
> D Steinberg
> G Dawra
> S Bryant
> H Assarpour
> H Shah
> L Contreras
> J Tantsura
> M Vigoureux
> We can't make a more pointed follow up as these contributors do not =
have their addresses listed in this draft, whilst not required -- they =
are appreciated for us to be able to follow up on those that have =
contributed material to drafts. Your assistance with following up here =
would be greatly appreciated.
> =20
> Thanks,
> r.
> =20
> On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com =
<mailto:robjs@google.com>> wrote:
>> Hi SPRING WG,
>> =20
>> This email initiates a two week working group adoption call for =
draft-xuclad-spring-sr-service-programming.. This follows the discussion =
that we had in the last few IETF meetings, and particularly the focused =
discussion we had at IETF 104 regarding service chaining and SPRING.
>> =20
>> Please indicate your support, comments, or objections for adopting =
this draft by Wednesday July 10th, 2019. We are particularly interested =
in hearing from WG members who are not authors of this draft, and those =
folks that are willing to spend time working on this draft after =
adoption.
>> =20
>> We are also looking for volunteers who can provide a technical review =
of the content of the draft at a later stage of its progress through the =
working group (e.g., before WGLC).
>> =20
>> In parallel - we'll send an IPR poll to the working group and =
authors. The currently disclosed IPR can be found in the datatracker =
<https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&id=3Ddraft-xuclad=
-spring-sr-service-programming>.
>> =20
>> Thanks!
>> Rob & Bruno.
> _______________________________________________
> spring mailing list
> spring@ietf.org <mailto:spring@ietf.org>
> https://www.ietf.org/mailman/listinfo/spring =
<https://www.ietf.org/mailman/listinfo/spring>
> <Mail-Anhang.eml>


--Apple-Mail=_06A7A577-2545-4EA9-9B0E-E993D5044F85
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Hi,<div class=3D"">&nbsp;<br class=3D"">I am not aware of any =
IPR regarding this draft.<br class=3D"">&nbsp;<br class=3D"">Best<br =
class=3D"">Dirk Steinberg<br class=3D""><br class=3D""><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><b =
class=3D"" style=3D"font-family: Calibri, sans-serif; font-size: 11pt; =
caret-color: rgb(0, 0, 0);"><span style=3D"font-size: 12pt;" =
class=3D"">From:&nbsp;</span></b><span class=3D"" style=3D"font-family: =
Calibri, sans-serif; caret-color: rgb(0, 0, 0); font-size: 12pt;">spring =
&lt;<a href=3D"mailto:spring-bounces@ietf.org" style=3D"color: purple;" =
class=3D"">spring-bounces@ietf.org</a>&gt; on behalf of Rob Shakir =
&lt;<a href=3D"mailto:robjs=3D40google.com@dmarc.ietf.org" style=3D"color:=
 purple;" =
class=3D"">robjs=3D40google.com@dmarc.ietf.org</a>&gt;</span></div><div =
class=3D""><div class=3D"WordSection1" style=3D"page: WordSection1; =
caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><div =
style=3D"border-style: solid none none; border-top-width: 1pt; =
border-top-color: rgb(181, 196, 223); padding: 3pt 0in 0in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
12pt;" class=3D""><b class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Sunday, August 4, 2019 =
at 6:13 PM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>SPRING WG List &lt;<a =
href=3D"mailto:spring@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">spring@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Re: [spring] WG =
Adoption Call: draft-xuclad-spring-sr-service-programming<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-family: =
Arial, sans-serif;" class=3D"">SPRING,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p=
 class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">Thanks for the review of this document. As with =
the other document,&nbsp;apologies for the delay in following up. Based =
on the mailing list replies, SPRING will adopt this document<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">once the IPR =
poll has been completed</b>.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-family: =
Arial, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">Authors - the following contributors have not =
yet responded&nbsp;to the IPR poll:<o:p =
class=3D""></o:p></span></div></div><div class=3D""><ul type=3D"disc" =
style=3D"margin-bottom: 0in;" class=3D""><li class=3D"MsoNormal" =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;"><span style=3D"font-family: Arial, sans-serif;" =
class=3D"">D Steinberg<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">G Dawra<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">S Bryant<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">H Assarpour<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">H Shah<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">L Contreras<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">J Tantsura<o:p class=3D""></o:p></span></li><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;"><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">M Vigoureux<o:p =
class=3D""></o:p></span></li></ul><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D"">We =
can't make&nbsp;a more pointed follow up as these contributors do not =
have their&nbsp;addresses listed in this draft, whilst not required -- =
they are appreciated for us to be able to follow up on those that have =
contributed material to drafts. Your assistance with following up here =
would be&nbsp;greatly appreciated.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p=
 class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">Thanks,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" =
class=3D"">r.<o:p class=3D""></o:p></span></div></div></div></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
class=3D""><div class=3D""><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">On Wed, =
Jun 26, 2019 at 11:13 PM Rob Shakir &lt;<a =
href=3D"mailto:robjs@google.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">robjs@google.com</a>&gt; =
wrote:<o:p class=3D""></o:p></div></div><blockquote style=3D"border-style:=
 none none none solid; border-left-width: 1pt; border-left-color: =
rgb(204, 204, 204); padding: 0in 0in 0in 6pt; margin-left: 4.8pt; =
margin-right: 0in;" class=3D"" type=3D"cite"><div class=3D""><div =
class=3D""><div class=3D""><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-family: Arial, sans-serif;" class=3D"">Hi SPRING WG,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p=
 class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">This email initiates a two week working group =
adoption call for draft-xuclad-spring-sr-service-programming.. This =
follows the discussion that we had in the last few IETF meetings, and =
particularly the focused discussion we had at IETF 104 regarding service =
chaining and SPRING.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-family: =
Arial, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">Please indicate your support, comments, or =
objections for adopting this draft by<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">Wednesday =
July 10th, 2019.</b>&nbsp;We are particularly interested in hearing from =
WG members who are not authors of this draft, and those folks that are =
willing to spend time working on this draft after adoption.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p=
 class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">We are also looking for volunteers who can =
provide a technical review of the content of the draft at a later stage =
of its progress through the working group (e.g., before WGLC).<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D""><o:p=
 class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">In parallel - we'll send an IPR poll to the =
working group and authors. The currently disclosed IPR can be found in =
the&nbsp;<a =
href=3D"https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&amp;id=3Dd=
raft-xuclad-spring-sr-service-programming" target=3D"_blank" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">datatracker</a>.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-family: =
Arial, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-family: Arial, =
sans-serif;" class=3D"">Thanks!<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-family: Arial, sans-serif;" class=3D"">Rob =
&amp; Bruno.<o:p =
class=3D""></o:p></span></div></div></div></div></blockquote></div></div><=
span style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; =
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word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: =
none; float: none; display: inline !important;" =
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text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none; float: none; =
display: inline !important;" class=3D"">spring mailing list</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
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text-transform: none; white-space: normal; word-spacing: 0px; =
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From: Rob Shakir <robjs@google.com>
Date: Mon, 5 Aug 2019 17:41:59 -0700
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Subject: Re: [spring] Beyond SRv6.
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Hi SPRING,

Just to address a couple of questions raised to me:

On Sun, Aug 4, 2019 at 2:03 PM Rob Shakir <robjs@google.com> wrote:

> As well as deployment limitations, we would like the SPRING community to
> briefly describe the platform limitations that they are seeing which limit
> the deployment of SRv6  In particular limitations related to the number of
> SIDs which can be pushed and forwarded and how much the use of shorter SIDs
> would improve the deployments .
>

We encourage input on the software/hardware limitations particularly from
those responsible for silicon, or system implementation, of course, such
feedback is very welcome from operators too :-)

Thanks!
r.

--0000000000005a19bc058f681804
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<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif">Hi SPRING,</div><div class=3D"gmail_de=
fault" style=3D"font-family:arial,helvetica,sans-serif"><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif">Just t=
o address a couple of questions raised to me:</div></div><br><div class=3D"=
gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Aug 4, 2019 at 2=
:03 PM Rob Shakir &lt;<a href=3D"mailto:robjs@google.com">robjs@google.com<=
/a>&gt; wrote:</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0=
px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div =
dir=3D"ltr"><span id=3D"gmail-m_37240462086706158gmail-docs-internal-guid-7=
c2e620c-7fff-3ced-50c2-1a2b627ac970"><font face=3D"arial, sans-serif"><p di=
r=3D"ltr" style=3D"line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span=
 style=3D"color:rgb(0,0,0);background-color:transparent;font-variant-numeri=
c:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space=
:pre-wrap">As well as deployment limitations, we would like the SPRING comm=
unity to briefly describe the platform limitations that they are seeing whi=
ch limit the deployment of SRv6=C2=A0 In particular limitations related to =
the number of SIDs which can be pushed and forwarded and how much the use o=
f shorter SIDs  would improve the deployments .</span></p></font></span></d=
iv></blockquote><div><br></div><div class=3D"gmail_default" style=3D"font-f=
amily:arial,helvetica,sans-serif">We encourage input on the software/hardwa=
re limitations particularly from those responsible for silicon, or system i=
mplementation, of course, such feedback=C2=A0is very welcome from operators=
 too :-)</div><div class=3D"gmail_default" style=3D"font-family:arial,helve=
tica,sans-serif"><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:arial,helvetica,sans-serif">Thanks!</div><div class=3D"gmail_default" sty=
le=3D"font-family:arial,helvetica,sans-serif">r.</div></div></div>

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From: Ron Bonica <rbonica@juniper.net>
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Subject: [spring] draft-filsfils-spring-net-pgm-extension-srv6-usid-01
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Authors,

Referring to the example in Section 5.2 of draft-filsfils-spring-net-pgm-ex=
tension-srv6-usid-01, what would happen if Node 7 instantiated the followin=
g:


  *   A uSID  identified by 2001:db8:0700/48
  *   A more specific route (e.g., 2001:db8:0700::/49)

Would the more specific route be ignored by the longest path lookup on Node=
 7? If not, would the more specific route cause all SR Paths whose penultim=
ate segment is 2001:db8:0700/48 to black hole?

                                                                           =
                                    Ron





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<p class=3D"MsoNormal">Authors,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Referring to the example in Section 5.2 of draft-fil=
sfils-spring-net-pgm-extension-srv6-usid-01, what would happen if Node 7 in=
stantiated the following:<o:p></o:p></p>
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<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l0 level1 =
lfo1">A uSID &nbsp;identified by 2001:db8:0700/48<o:p></o:p></li><li class=
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ore specific route (e.g., 2001:db8:0700::/49)<o:p></o:p></li></ul>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Would the more specific route be ignored by the long=
est path lookup on Node 7? If not, would the more specific route cause all =
SR Paths whose penultimate segment is 2001:db8:0700/48 to black hole?<o:p><=
/o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
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p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
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nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp; Ron<o:p></o:p></p>
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From: Andrew Alston <Andrew.Alston@liquidtelecom.com>
To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>
Thread-Topic: [spring] Beyond SRv6.
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Date: Wed, 7 Aug 2019 04:15:44 +0000
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Subject: Re: [spring] Beyond SRv6.
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From: Andrew Alston <Andrew.Alston@liquidtelecom.com>
To: =?utf-8?B?5b6Q5bCP6JmOKOS5ieWFiCk=?= <xiaohu.xxh@alibaba-inc.com>, spring <spring-bounces@ietf.org>, Rob Shakir <robjs=40google.com@dmarc.ietf.org>,  SPRING WG List <spring@ietf.org>
Thread-Topic: [spring] Beyond SRv6.
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Date: Wed, 7 Aug 2019 08:34:00 +0000
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Subject: Re: [spring] Beyond SRv6.
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Subject: Re: [spring] [Idr] draft-ietf-spring-segment-routing-policy
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Bruno and Ketan: 

 

It is important to get the registries and the early allocation aligned.
After Bruno returns, perhaps the chairs can chat about the options with the
authors. 

 

Cheerily, Sue 

 

From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Ketan Talaulikar
(ketant)
Sent: Thursday, August 1, 2019 10:37 PM
To: bruno.decraene@orange.com; SPRING WG List
Cc: idr wg
Subject: Re: [Idr] draft-ietf-spring-segment-routing-policy

 

+ IDR WG since some of the affected documents are IDR WG drafts

 

Hi Bruno,

 

I agree that the draft-ietf-spring-segment-routing-policy [1] is the right
place to normatively define the different segment types and perhaps would
have been the right document to create an IANA registry for them.

 

I also agree that the draft-ietf-idr-segment-routing-te-policy [2] has a
discrepancy between its IANA section 8.4 for the Segment-List sub-TLV space
and section 2.4.3.2 (and it's sub-sections) where the different Segment
Types have been defined. I will request the authors of this draft to fix the
text in section 2.4.3.2 (and it's sub-sections) for the types 8 and above to
adjust for the codepoint 9 allocated for the weight sub-TLV.

 

At this point, given the implementations available and already deployed for
[2], I doubt if we can correct and map the segment types in that draft to
what has been defined in [1].

 

There is also the
https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distribution-11#section-9.
.7
<https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distribution-11#section-9
.7>  which creates the Segment Types IANA registry (aligned with [1]). And
then I am not sure if draft-raza-spring-sr-policy-yang is able to
benefit/leverage the IANA registry from [1].

 

So unless we can have the IANA registry created via [1] being consistently
used in all dependent documents, I do not see much gain in setting up the
Segment Type registry under IANA at this point.

 

Thanks,

Ketan

 

From: spring <spring-bounces@ietf.org> On Behalf Of
bruno.decraene@orange.com
Sent: 01 August 2019 19:10
To: SPRING WG List <spring@ietf.org>
Subject: [spring] draft-ietf-spring-segment-routing-policy

 

Hi authors,

 

Speaking as individual contributor.

 

This document seems to define multiple types of segments (1 to 11).

May be this document would be the right place to define them normatively and
creates the IANA registry for them. And this seems like a work for spring.

Otherwise, there is a risk that other documents redefine them, possibly in a
non-consistent manner. (1) E.g.  the BGP draft is not using the same type
numbers/name, which may bring confusion. I would expect YANG models to also
need these types.

BTW is there any chance to align the types in the BGP document or is this
too late? (alternatively may be changing the types in the sr-policy
document)

 

Thanks,

Regards,

Bruno

 

(1)

SR-policy:

   Type 1: SR-MPLS Label:
   Type 2: SRv6 SID:
   Type 3: IPv4 Prefix with optional SR Algorithm:
   Type 4: IPv6 Global Prefix with optional SR Algorithm for SR-MPLS:
   Type 5: IPv4 Prefix with Local Interface ID:
   Type 6: IPv4 Addresses for link endpoints as Local, Remote pair:
   Type 7: IPv6 Prefix and Interface ID for link endpoints as Local, Remote
pair for SR-MPLS:
   Type 8: IPv6 Addresses for link endpoints as Local, Remote pair for
SR-MPLS:
   Type 9: IPv6 Global Prefix with optional SR Algorithm for SRv6:
   Type 10: IPv6 Prefix and Interface ID for link endpoints as Local, Remote
pair for SRv6:
   Type 11: IPv6 Addresses for link endpoints as Local, Remote pair for
SRv6:

 

 

BGP:

   1     MPLS SID sub-TLV                            This document

   2     SRv6 SID sub-TLV                            This document

   3     IPv4 Node and SID sub-TLV                   This document

   4     IPv6 Node and SID for SR-MPLS sub-TLV       This document

   5     IPv4 Node, index and SID sub-TLV            This document

   6     IPv4 Local/Remote addresses and SID sub-TLV This document

   7     IPv6 Node, index for remote and local pair  This document

         and SID for SR-MPLS sub-TLV

   8     IPv6 Local/Remote addresses and SID sub-TLV This document

   9     Weight sub-TLV                              This document

   10    IPv6 Node and SID for SRv6 sub-TLV          This document

   11    IPv6 Node, index for remote and local pair  This document

         and SID for SRv6 sub-TLV

   12    IPv6 Local/Remote addresses and SID for     This document

         SRv6 sub-TLV

 

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Bruno and Ketan: <o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>It is important to get =
the registries and the early allocation aligned.&nbsp;&nbsp; After Bruno =
returns, perhaps the chairs can chat about the options with the authors. =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Cheerily, Sue =
<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Idr [mailto:idr-bounces@ietf.org] <b>On Behalf Of </b>Ketan Talaulikar =
(ketant)<br><b>Sent:</b> Thursday, August 1, 2019 10:37 PM<br><b>To:</b> =
bruno.decraene@orange.com; SPRING WG List<br><b>Cc:</b> idr =
wg<br><b>Subject:</b> Re: [Idr] =
draft-ietf-spring-segment-routing-policy<o:p></o:p></span></p></div></div=
><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
lang=3DEN-IN>+ IDR WG since some of the affected documents are IDR WG =
drafts<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>Hi Bruno,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>I agree that the draft-ietf-spring-segment-routing-policy =
[1] is the right place to normatively define the different segment types =
and perhaps would have been the right document to create an IANA =
registry for them.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>I also agree that the =
draft-ietf-idr-segment-routing-te-policy [2] has a discrepancy between =
its IANA section 8.4 for the Segment-List sub-TLV space and section =
2.4.3.2 (and it&#8217;s sub-sections) where the different Segment Types =
have been defined. I will request the authors of this draft to fix the =
text in section 2.4.3.2 (and it&#8217;s sub-sections) for the types 8 =
and above to adjust for the codepoint 9 allocated for the weight =
sub-TLV.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>At this point, given the implementations available and =
already deployed for [2], I doubt if we can correct and map the segment =
types in that draft to what has been defined in =
[1].<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>There is also the <a =
href=3D"https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distribution-11=
#section-9.7">https://tools.ietf.org/html/draft-ietf-idr-te-lsp-distribut=
ion-11#section-9..7</a> which creates the Segment Types IANA registry =
(aligned with [1]). And then I am not sure if =
draft-raza-spring-sr-policy-yang is able to benefit/leverage the IANA =
registry from [1].<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>So unless we can have the IANA registry created via [1] =
being consistently used in all dependent documents, I do not see much =
gain in setting up the Segment Type registry under IANA at this =
point.<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>Thanks,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN>Ketan<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b><span =
style=3D'mso-fareast-language:EN-IN'>From:</span></b><span =
style=3D'mso-fareast-language:EN-IN'> spring =
&lt;spring-bounces@ietf.org&gt; <b>On Behalf Of =
</b>bruno.decraene@orange.com<br><b>Sent:</b> 01 August 2019 =
19:10<br><b>To:</b> SPRING WG List =
&lt;spring@ietf.org&gt;<br><b>Subject:</b> [spring] =
draft-ietf-spring-segment-routing-policy<o:p></o:p></span></p></div></div=
><p class=3DMsoNormal><span lang=3DEN-IN><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal>Hi authors,<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Speaking as =
individual contributor.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>This =
document seems to define multiple types of segments (1 to =
11).<o:p></o:p></p><p class=3DMsoNormal>May be this document would be =
the right place to define them normatively and creates the IANA registry =
for them. And this seems like a work for spring.<o:p></o:p></p><p =
class=3DMsoNormal>Otherwise, there is a risk that other documents =
redefine them, possibly in a non-consistent manner. (1) E.g.&nbsp; the =
BGP draft is not using the same type numbers/name, which may bring =
confusion. I would expect YANG models to also need these =
types.<o:p></o:p></p><p class=3DMsoNormal>BTW is there any chance to =
align the types in the BGP document or is this too late? (alternatively =
may be changing the types in the sr-policy document)<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Thanks,<o:p></o:p></p><p =
class=3DMsoNormal>Regards,<o:p></o:p></p><p =
class=3DMsoNormal>Bruno<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>(1)<o:p></o:p></p><p =
class=3DMsoNormal>SR-policy:<o:p></o:p></p><pre>&nbsp;&nbsp; Type 1: =
SR-MPLS Label:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 2: SRv6 =
SID:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 3: IPv4 Prefix with optional =
SR Algorithm:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 4: IPv6 Global =
Prefix with optional SR Algorithm for =
SR-MPLS:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 5: IPv4 Prefix with =
Local Interface ID:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 6: IPv4 =
Addresses for link endpoints as Local, Remote =
pair:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 7: IPv6 Prefix and =
Interface ID for link endpoints as Local, Remote pair for =
SR-MPLS:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 8: IPv6 Addresses for =
link endpoints as Local, Remote pair for =
SR-MPLS:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 9: IPv6 Global Prefix =
with optional SR Algorithm for SRv6:<o:p></o:p></pre><pre>&nbsp;&nbsp; =
Type 10: IPv6 Prefix and Interface ID for link endpoints as Local, =
Remote pair for SRv6:<o:p></o:p></pre><pre>&nbsp;&nbsp; Type 11: IPv6 =
Addresses for link endpoints as Local, Remote pair for =
SRv6:<o:p></o:p></pre><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>BGP:<o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; =
MPLS SID =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp; =
SRv6 SID =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp; This document<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp; =
IPv4 Node and SID =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp; =
IPv6 Node and SID for SR-MPLS =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp; =
IPv4 Node, index and SID =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
 This document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp; =
IPv4 Local/Remote addresses and SID sub-TLV This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp; =
IPv6 Node, index for remote and local pair&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; and SID for SR-MPLS sub-TLV<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp; =
IPv6 Local/Remote addresses and SID sub-TLV This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp; =
Weight =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp; &nbsp;10&nbsp;&nbsp;&nbsp; IPv6 =
Node and SID for SRv6 =
sub-TLV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 11&nbsp;&nbsp;&nbsp; IPv6 =
Node, index for remote and local pair&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; and SID for SRv6 sub-TLV<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp; 12&nbsp;&nbsp;&nbsp; IPv6 =
Local/Remote addresses and SID for&nbsp;&nbsp;&nbsp;&nbsp; This =
document<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; </span><span lang=3DFR =
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-language:FR'>SRv6 sub-TLV<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><pre><span =
lang=3DFR>_______________________________________________________________=
__________________________________________________________<o:p></o:p></sp=
an></pre><pre><span lang=3DFR><o:p>&nbsp;</o:p></span></pre><pre><span =
lang=3DFR>Ce message et ses pieces jointes peuvent contenir des =
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donc<o:p></o:p></span></pre><pre><span lang=3DFR>pas etre diffuses, =
exploites ou copies sans autorisation. Si vous avez recu ce message par =
erreur, veuillez le signaler<o:p></o:p></span></pre><pre><span =
lang=3DFR>a l'expediteur et le detruire ainsi que les pieces jointes. =
Les messages electroniques etant susceptibles =
d'alteration,<o:p></o:p></span></pre><pre><span lang=3DFR>Orange decline =
toute responsabilite si ce message a ete altere, deforme ou falsifie. =
Merci.<o:p></o:p></span></pre><pre><span =
lang=3DFR><o:p>&nbsp;</o:p></span></pre><pre><span lang=3DFR>This =
message and its attachments may contain confidential or privileged =
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From: "Voyer, Daniel" <daniel.voyer@bell.ca>
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Thread-Topic: [EXT][spring] draft-voyer-spring-sr-p2mp-policy-03
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Subject: [spring] I-D Action: draft-ietf-spring-nsh-sr-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking WG of the IETF.

        Title           : Network Service Header (NSH) and Segment Routing Integration for Service Function Chaining (SFC)
        Authors         : James N Guichard
                          Haoyu Song
                          Jeff Tantsura
                          Joel Halpern
                          Wim Henderickx
                          Mohamed Boucadair
                          Syed Hassan
	Filename        : draft-ietf-spring-nsh-sr-00.txt
	Pages           : 16
	Date            : 2019-08-07

Abstract:
   This document describes two application scenarios where Network
   Service Header (NSH) and Segment Routing (SR) techniques can be
   deployed together to support Service Function Chaining (SFC) in an
   efficient manner while maintaining separation of the service and
   transport planes as originally intended by the SFC architecture.

   In the first scenario, an NSH-based SFC is created using SR as the
   transport between Service Function Forwarders (SFFs).  SR in this
   case is just one of many encapsulations that could be used to
   maintain the transport-independent nature of NSH-based service
   chains.

   In the second scenario, SR is used to represent each service hop of
   the NSH-based SFC as a segment within the segment-list.  SR and NSH
   in this case are integrated.

   In both scenarios SR is responsible for steering packets between SFFs
   along a given Service Function Path (SFP) while NSH is responsible
   for maintaining the integrity of the service plane, the SFC instance
   context, and any associated metadata.

   These application scenarios demonstrate that NSH and SR can work
   jointly and complement each other leaving the network operator with
   the flexibility to use whichever transport technology makes sense in
   specific areas of their network infrastructure, and still maintain an
   end-to-end service plane using NSH.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-spring-nsh-sr/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-spring-nsh-sr-00
https://datatracker.ietf.org/doc/html/draft-ietf-spring-nsh-sr-00


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/1I4dNHrAi5c-xRXU7T78YAfacDw>
Subject: Re: [spring] WG Adoption Call: draft-xuclad-spring-sr-service-programming
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Hello,

I'm not aware of any undisclosed IPR which would cover the contents of=20
this draft.

-m

Le 2019-08-05 =E0 19:30, Dirk Steinberg a =E9crit=A0:
> Hi,
>=20
> I am not aware of any IPR regarding this draft.
>=20
> Best
> Dirk Steinberg
>=20
>=20
>> *From: *spring <spring-bounces@ietf.org=20
>> <mailto:spring-bounces@ietf.org>> on behalf of Rob Shakir=20
>> <robjs=3D40google.com@dmarc.ietf.org=20
>> <mailto:robjs=3D40google.com@dmarc.ietf.org>>
>> *Date:*Sunday, August 4, 2019 at 6:13 PM
>> *To:*SPRING WG List <spring@ietf.org <mailto:spring@ietf.org>>
>> *Subject:*Re: [spring] WG Adoption Call:=20
>> draft-xuclad-spring-sr-service-programming
>> SPRING,
>> Thanks for the review of this document. As with the other=20
>> document,=A0apologies for the delay in following up. Based on the=20
>> mailing list replies, SPRING will adopt this document*once the IPR=20
>> poll has been completed*.
>> Authors - the following contributors have not yet responded=A0to the IPR=
=20
>> poll:
>>
>>   * D Steinberg
>>   * G Dawra
>>   * S Bryant
>>   * H Assarpour
>>   * H Shah
>>   * L Contreras
>>   * J Tantsura
>>   * M Vigoureux
>>
>> We can't make=A0a more pointed follow up as these contributors do not=20
>> have their=A0addresses listed in this draft, whilst not required -- they=
=20
>> are appreciated for us to be able to follow up on those that have=20
>> contributed material to drafts. Your assistance with following up here=20
>> would be=A0greatly appreciated.
>> Thanks,
>> r.
>> On Wed, Jun 26, 2019 at 11:13 PM Rob Shakir <robjs@google.com=20
>> <mailto:robjs@google.com>> wrote:
>>> Hi SPRING WG,
>>> This email initiates a two week working group adoption call for=20
>>> draft-xuclad-spring-sr-service-programming.. This follows the=20
>>> discussion that we had in the last few IETF meetings, and=20
>>> particularly the focused discussion we had at IETF 104 regarding=20
>>> service chaining and SPRING.
>>> Please indicate your support, comments, or objections for adopting=20
>>> this draft by*Wednesday July 10th, 2019.*=A0We are particularly=20
>>> interested in hearing from WG members who are not authors of this=20
>>> draft, and those folks that are willing to spend time working on this=20
>>> draft after adoption.
>>> We are also looking for volunteers who can provide a technical review=20
>>> of the content of the draft at a later stage of its progress through=20
>>> the working group (e.g., before WGLC).
>>> In parallel - we'll send an IPR poll to the working group and=20
>>> authors. The currently disclosed IPR can be found in the datatracker=20
>>> <https://datatracker.ietf.org/ipr/search/?submit=3Ddraft&id=3Ddraft-xuc=
lad-spring-sr-service-programming>.
>>> Thanks!
>>> Rob & Bruno.
>> _______________________________________________
>> spring mailing list
>> spring@ietf.org <mailto:spring@ietf.org>
>> https://www.ietf.org/mailman/listinfo/spring
>> <Mail-Anhang.eml>
>=20
>=20
>=20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring
>=20


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From: li zhenqiang <li_zhenqiang@hotmail.com>
To: draft-ali-6man-spring-srv6-oam <draft-ali-6man-spring-srv6-oam@ietf.org>,  spring <spring@ietf.org>
Thread-Topic: comments on draft-ali-6man-spring-srv6-oam-03
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/-1naXqwIH_6yge8zV9YUe5palyU>
Subject: [spring] comments on draft-ali-6man-spring-srv6-oam-03
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Dear authors and all,

Zhenqiang Li from China Mobile. Please consider the following comments.

1. Section 4.1.2.1, bullet 4, When node N4 receives the packet.
I think it is better to change "The packet gets punted to the ICMPv6 proces=
s for processing" to "The packet gets time-stamped and punted to the ICMPv6=
 process for processing".

2. Section 4.1.2.2, the last bullet.
The sentence "The ICMPv6 process at node N4 checks if its local SID (B:2:C3=
1) is locally programmed or not and responds to the ICMPv6 Echo Request" sh=
ould be "The ICMPv6 process at node N4 checks if its local SID (B:4:C52) is=
 locally programmed or not and responds to the ICMPv6 Echo Request".

Since Flags.O=3D1 is used in this case, N4 should execute the local SID B:4=
:C52 after the execution of the pseudo-code specified in section 3.1.1. Wha=
t is the proper behavior of N4 here?  Generate an ICMP parameter problem me=
ssage to the Source with Error code "SR Upper-layer Header Error" according=
 to section 4.3.1.2 of draft-ietf-6man-segment-routing-header-22?

To align with the bullets listed in section 4.1.2.1, we'd better add one ne=
w bullet here with the text "If the target SID is not locally programmed, N=
4 responses with the ICMPv6 message (Type:"SRv6 OAM (TBA)", Code: "SID not =
locally implemented (TBA)"); otherwise a success is returned".

3. Section 4.2.2.1, the last bullet.
I think it is better to change "The packet gets punted to the traceroute pr=
ocess for processing" to "The packet gets time-stamped and punted to the tr=
aceroute process for processing"

To align with the bullets listed in section 4.1.2.1, we'd better add one ne=
w bullet here with the text "If the target SID B:4:C52 is locally programme=
d, node N4 responses with the ICMPv6 message (Type: Destination unreachable=
, Code: Port Unreachable). If the target SID B:4:C52 is not a local SID, no=
de N4 silently drops the traceroute probe".

4. Section 4.2.2.2, the last bullet.
The sentence "The traceroute process at node N4 checks if its local SID (B:=
2:C31) is locally programmed" should be "The traceroute process at node N4 =
checks if its local SID (B:4:C52) is locally programmed".

Since Flags.O=3D1 is used in this case, N4 should execute the local SID B:4=
:C52 after the execution of the pseudo-code specified in section 3.1.1. Wha=
t is the proper behavior of N4 here?  Generate an ICMP parameter problem me=
ssage to the Source with Error code "SR Upper-layer Header Error" according=
 to section 4.3.1.2 of draft-ietf-6man-segment-routing-header-22?

To align with the bullets listed in section 4.1.2.1, we'd better split this=
 bullet into two.

5. Figure 5
The SL for the response from 2001:DB8:1:2:21:: should be 1. The SL for the =
response from 2001:DB8:3:4::41:: should be 0.

6. Section 6.2
Don't we need to define PSP and USP for END.OP and END.OTP?

My pleasure to work together to move this draft forward.

Best Regards,
Zhenqiang Li
________________________________
li_zhenqiang@hotmail.com

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<div><span></span>Dear authors and all,</div>
<div><br>
</div>
<div>Zhenqiang Li from China Mobile. Please consider the following comments=
.</div>
<div><br>
</div>
<div>1. Section 4.1.2.1, bullet 4, When node N4 receives the packet.&nbsp;<=
/div>
<div>I think it is better to change &quot;<span style=3D"background-color: =
transparent;">The packet gets punted to the ICMPv6 process for&nbsp;</span>=
<span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: trans=
parent;">processing&quot; to &quot;</span><span style=3D"background-color: =
transparent;">The
 packet gets&nbsp;</span><span style=3D"background-color: transparent;">tim=
e-stamped and</span><span style=3D"font-size: 10.5pt; line-height: 1.5; bac=
kground-color: transparent;">&nbsp;punted to the ICMPv6 process for&nbsp;</=
span><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">processing</span><span style=3D"font-size: 10.5pt; line-heigh=
t: 1.5; background-color: transparent;">&quot;.</span></div>
<div><br>
</div>
<div>2. Section 4.1.2.2, the last bullet.&nbsp;</div>
<div>The sentence &quot;<span style=3D"background-color: transparent;">The =
ICMPv6 process at node N4&nbsp;</span><span style=3D"font-size: 10.5pt; lin=
e-height: 1.5; background-color: transparent;">checks if its local SID (B:2=
:C31) is locally programmed or not and&nbsp;</span><span style=3D"font-size=
: 10.5pt; line-height: 1.5; background-color: transparent;">responds
 to the ICMPv6 Echo Request</span><span style=3D"font-size: 10.5pt; line-he=
ight: 1.5; background-color: transparent;">&quot; should be &quot;</span><s=
pan style=3D"background-color: transparent;">The ICMPv6 process at node N4&=
nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; background-=
color: transparent;">checks
 if its local SID (B:4:C52) is locally programmed or not and&nbsp;</span><s=
pan style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transpa=
rent;">responds to the ICMPv6 Echo Request</span><span style=3D"font-size: =
10.5pt; line-height: 1.5; background-color: transparent;">&quot;.</span></d=
iv>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">Since&nbsp;</span><span style=3D"background-color: transparen=
t;">Flags.O=3D1 is used in this case, N4 should&nbsp;</span><span style=3D"=
background-color: transparent;">execute&nbsp;</span><span style=3D"backgrou=
nd-color: transparent;">the
 local&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; back=
ground-color: transparent;">SID&nbsp;</span><span style=3D"font-size: 10.5p=
t; line-height: 1.5; background-color: transparent;">B:4:C52 after&nbsp;</s=
pan><span style=3D"background-color: transparent;">the
 execution of the&nbsp;</span><span style=3D"background-color: transparent;=
">pseudo-code specified in section 3.1.1. What is the proper behavior of N4=
 here? &nbsp;Generate&nbsp;</span><span style=3D"background-color: transpar=
ent;">an ICMP parameter problem message to the Source
 with&nbsp;</span><span style=3D"background-color: transparent;">Error code=
 &quot;SR Upper-layer&nbsp;</span><span style=3D"font-size: 10.5pt; line-he=
ight: 1.5; background-color: transparent;">Header Error&quot; according to =
section 4.3.1.2 of&nbsp;</span><span style=3D"background-color: transparent=
;">draft-ietf-6man-segment-routing-header-22?</span></div>
<div><span style=3D"background-color: transparent;"><br>
</span></div>
<div>To align with the bullets listed in section 4.1.2.1, we'd better add o=
ne new bullet here with the text &quot;<span style=3D"background-color: tra=
nsparent;">If the target SID is not&nbsp;</span><span style=3D"font-size: 1=
0.5pt; line-height: 1.5; background-color: transparent;">locally
 programmed, N4 responses with the ICMPv6 message (Type:</span><span style=
=3D"font-size: 10.5pt; line-height: 1.5; background-color: transparent;">&q=
uot;SRv6 OAM (TBA)&quot;, Code: &quot;SID not locally implemented (TBA)&quo=
t;);&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; backgr=
ound-color: transparent;">otherwise
 a success is returned</span><span style=3D"font-size: 10.5pt; line-height:=
 1.5; background-color: transparent;">&quot;.</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">3. Section 4.2.2.1, the last bullet.</span></div>
<div><span style=3D"background-color: transparent;">
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">I think it is better to change</span><span style=3D"font-size=
: 10.5pt; line-height: 1.5; background-color: transparent;">&nbsp;&quot;</s=
pan>The packet gets punted to the traceroute process
 for&nbsp;<span style=3D"font-size: 10.5pt; line-height: 1.5; background-co=
lor: transparent;">processing&quot; to &quot;</span><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5; background-color: transparent;">The packet get=
s&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; backgroun=
d-color: transparent;">time-stamped
 and&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; backgr=
ound-color: transparent;">punted to the traceroute process for&nbsp;</span>=
<span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: trans=
parent;">processing</span><span style=3D"font-size: 10.5pt; line-height: 1.=
5; background-color: transparent;">&quot;</span></div>
</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div><span style=3D"background-color: transparent;">
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">To align with the bullets listed in section 4.1.2.1, we'd bet=
ter add one new bullet here with the text &quot;</span>If the target SID&nb=
sp;<span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: tr=
ansparent;">B:4:C52
 is locally programmed, node N4 responses with the ICMPv6&nbsp;</span><span=
 style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transparen=
t;">message (Type: Destination unreachable, Code: Port Unreachable).&nbsp;<=
/span><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color:=
 transparent;">If
 the target SID B:4:C52 is not a local SID, node N4 silently&nbsp;</span><s=
pan style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transpa=
rent;">drops the traceroute probe&quot;.</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div>4. Section&nbsp;<span style=3D"font-size: 10.5pt; line-height: 1.5; ba=
ckground-color: transparent;">4.2.2.2, the last bullet.</span></div>
<div><span style=3D"background-color: transparent;">
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">The sentence &quot;</span>The traceroute process at node&nbsp=
;<span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: tran=
sparent;">N4 checks if its local SID (B:2:C31)
 is locally programmed&quot; should be &quot;</span><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5; background-color: transparent;">The traceroute=
 process at node&nbsp;</span><span style=3D"font-size: 10.5pt; line-height:=
 1.5; background-color: transparent;">N4 checks if
 its local SID (</span>B:4:C52<span style=3D"font-size: 10.5pt; line-height=
: 1.5; background-color: transparent;">) is locally programmed</span><span =
style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transparent=
;">&quot;.</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">Since&nbsp;</span><span style=3D"background-color: transparen=
t;">Flags.O=3D1 is used in this case, N4 should&nbsp;</span><span style=3D"=
background-color: transparent;">execute&nbsp;</span><span style=3D"backgrou=
nd-color: transparent;">the
 local&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; back=
ground-color: transparent;">SID&nbsp;</span><span style=3D"font-size: 10.5p=
t; line-height: 1.5; background-color: transparent;">B:4:C52 after&nbsp;</s=
pan><span style=3D"background-color: transparent;">the
 execution of the&nbsp;</span><span style=3D"background-color: transparent;=
">pseudo-code specified in section 3.1.1. What is the proper behavior of N4=
 here? &nbsp;Generate&nbsp;</span><span style=3D"background-color: transpar=
ent;">an ICMP parameter problem message to the Source
 with&nbsp;</span><span style=3D"background-color: transparent;">Error code=
 &quot;SR Upper-layer&nbsp;</span><span style=3D"font-size: 10.5pt; line-he=
ight: 1.5; background-color: transparent;">Header Error&quot; according to =
section 4.3.1.2 of&nbsp;</span><span style=3D"background-color: transparent=
;">draft-ietf-6man-segment-routing-header-22?</span></div>
</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div>To align with the bullets listed in section 4.1.2.1, we'd better split=
 this bullet into two.</div>
<div><br>
</div>
<div>5. Figure 5</div>
<div>The SL for the response from&nbsp;2001:DB8:1:2:21:: should be 1. The<s=
pan style=3D"background-color: transparent;"><span style=3D"font-size: 10.5=
pt; line-height: 1.5;">&nbsp;SL for the response from&nbsp;</span>2001:DB8:=
3:4::41::<span style=3D"font-size: 10.5pt; line-height: 1.5;">&nbsp;should
 be 0.</span></span></div>
<div><span style=3D"background-color: transparent;"><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5;"><br>
</span></span></div>
<div><span style=3D"background-color: transparent;"><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5;">6. Section 6.2</span></span></div>
<div><span style=3D"background-color: transparent;"><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5;">Don't we need to define PSP and USP for END.O=
P and END.OTP?</span></span></div>
<div><span style=3D"background-color: transparent;"><span style=3D"font-siz=
e: 10.5pt; line-height: 1.5;"><br>
</span></span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">My pleasure to work&nbsp;</span><span style=3D"font-size: 10.=
5pt; line-height: 1.5; background-color: transparent;">together to</span><s=
pan style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transpa=
rent;">&nbsp;move
 this draft forward.</span></div>
</span></div>
<div><br>
</div>
<div>Best Regards,</div>
<div>Zhenqiang Li</div>
<hr style=3D"width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=
=3D"left">
<div><span>
<div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<div>li_zhenqiang@hotmail.com</div>
</div>
</span></div>
</body>
</html>

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To: li zhenqiang <li_zhenqiang@hotmail.com>, draft-ali-6man-spring-srv6-oam <draft-ali-6man-spring-srv6-oam@ietf.org>, spring <spring@ietf.org>, "ipv6@ietf.org" <ipv6@ietf.org>
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From: Ron Bonica <rbonica@juniper.net>
To: SPRING WG <spring@ietf.org>, "6man@ietf.org" <6man@ietf.org>
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Zafar,

In draft-ali-6man-spring-srv6-oam, it appears that the SRH O-flag is proces=
sed even when Segments Left is equal to zero.

Do you see that as being in conflict with the Section 4.3.1.1 of draft-ietf=
-6man-segment-routing-header, lines S02 through S04?

                                                                           =
                                            Ron



Juniper Business Use Only

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<p class=3D"MsoNormal">Zafar,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">In draft-ali-6man-spring-srv6-oam, it appears that t=
he SRH O-flag is processed even when Segments Left is equal to zero.<o:p></=
o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Do you see that as being in conflict with the Sectio=
n 4.3.1.1 of draft-ietf-6man-segment-routing-header, lines S02 through S04?=
<o:p></o:p></p>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ron<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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<p class=3D"msipfooter30b3d538" align=3D"Center" style=3D"margin:0"><span s=
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Subject: Re: [spring] draft-ali-6man-spring-srv6-oam
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From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'SPRING WG'" <spring@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/XkJB91QmCi_fXy4QxRVHZj6Ib24>
Subject: [spring] Review of draft-ietf-spring-mpls-path-segment-00
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Hi SPRING and document authors,

Now we've adopted this draft, I thought I should give it a more careful
reading. Here are some thoughts and nits.

Best,
Adrian

=== General thoughts ===

I think that the Abstract and Introduction need to make it clear (as the
title does, and does Section 2) that this document only applies to
SR-MPLS.  I have suggested edits in line.

---

Do we need to cover PHP?

---

In the case of a centralised controller, there is a risk that a Path
Segment will be applied for an egress that does not expect it.  It will
know what to do with the last segment identifier in the path list (i.e.,
pop it) and will then find the path segment label.  The risk is that
that label is somehow in the LFIB (if it is not, then it is unrecognised
and the packet is simply dropped).  Presumably, the important thing is
for the centralised controller to not make this mistake, and there is
nothing the egress can do to protect itself.  The big risk is when a
central controller is allocating Path Segment identifiers and the egress
node is allocating labels from the same space.  It is important to write
something about this.  Probably you can reduce the risk by splitting the
label space. Maybe this all belongs in Section 4.

=== Edits ===

Abstract

OLD
   A Segment Routing (SR) path is identified by an SR segment list, one
   or partial segments of the list cannot uniquely identify the SR path.
   Path identification is a pre-requisite for various use-cases such as
   performance measurement (PM) of an SR path.
NEW
   A Segment Routing (SR) path is identified by an SR segment list.  Only
   the full segment list identifies the full end-to-end path, and one
   segment or a partial set of segments from the list cannot identify
   the SR path and distinguish it from other SR paths that may be
   partially congruent.  But path identification is a pre-requisite for
   various use-cases such as performance measurement (PM) of an SR path.

   In SR for MPLS (SR-MPLS) the segment identifiers are stripped from
   the packet through label popping as the packet transits the network.
   This means that when a packet reaches the egress of the SR path, it
   is not possible to determine on which SR path it traversed the
   network.
END

OLD
   This document defines a new type of segment that is referred to as
   Path Segment, which is used to identify an SR path.  When used, it is
   inserted at the ingress node of the SR path and immediately follows
   the last segment of the SR path.  The Path Segment will not be popped
   off until it reaches the egress node of the SR path.
NEW
   This document defines a new type of segment that is referred to as
   Path Segment, which is used to identify an SR path in an SR-MPLS
   network.  When used, it is inserted at the ingress node of the SR
   path and immediately follows the last segment identifier in the
   segment list of the SR path.  The Path Segment will not be popped
   off until it reaches the egress node of the SR path.
END

OLD
   Path Segment can be used by the egress node to implement path
   identification hence to support various use-cases including SR path
   PM, end-to-end 1+1 SR path protection and bidirectional SR paths
   correlation.
NEW
   A Path Segment can be used by the egress node to implement path
   identification hence to support various use-cases including SR path
   PM, end-to-end 1+1 SR path protection, and bidirectional SR paths
   correlation.
END

---

1.  Introduction

OLD
   Segment Routing (SR) [RFC8402] is a source routed forwarding method
   that allows to directly encode forwarding instructions (called
   segments) in each packet, hence it enables to steer traffic through a
   network without the per-flow states maintained on the transit nodes.
   Segment Routing can be instantiated on MPLS data plane or IPv6 data
   plane.  The former is called SR-MPLS, the latter is called SRv6
   [RFC8402].  SR-MPLS leverages the MPLS label stack to construct SR
   path, and SRv6 uses the a new IPv6 Extension Header (EH) called the
   IPv6 Segment Routing Header (SRH)
   [I-D.ietf-6man-segment-routing-header] to construct SR path.
NEW
   Segment Routing (SR) [RFC8402] is a source routed forwarding method
   that allows to directly encode forwarding instructions (called
   segments) in each packet, hence it enables steering traffic through a
   network without the per-flow states maintained on the transit nodes.
   Segment Routing can be instantiated on an MPLS data plane or an IPv6
   data plane.  The former is called SR-MPLS
   [I-D.ietf-spring-segment-routing-mpls], the latter is called SRv6
   [RFC8402].  SR-MPLS leverages the MPLS label stack to construct SR
   paths.
END

OLD
   In an SR-MPLS network, when a packet is transmitted along an SR path,
   the labels in the MPLS label stack will be swapped or popped.  So
   that no label or only the last label may be left in the MPLS label
   stack when the packet reaches the egress node.  Thus, the egress node
   cannot determine from which SR path the packet comes.
NEW
   In an SR-MPLS network, when a packet is transmitted along an SR path,
   the labels in the MPLS label stack will be swapped or popped.  So
   that no label or only the last label may be left in the MPLS label
   stack when the packet reaches the egress node.  Thus, the egress node
   cannot determine along which SR path the packet came.
END

   However, to support use cases like end-to-end 1+1 path protection
   (Live-Live case), bidirectional path correlation or performance
   measurement (PM), the ability to implement path identification is a
   pre-requisite.
>>> Would be good to give a reason for this pre-requisite.

OLD
   Therefore, this document introduces a new segment that is referred to
   as Path Segment.  A Path Segment is defined to uniquely identify an
   SR path in the context of the egress node.  It is normally used by
   egress nodes for path identification or correlation.
NEW
   Therefore, this document introduces a new segment that is referred to
   as the Path Segment.  A Path Segment is defined to uniquely identify
   an SR path in an SR-MPLS network in the context of the egress node.
   It is normally used by egress nodes for path identification or
   correlation.
END

---

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP14 [RFC2119][RFC8174] when, and only when, they appear in all
   capitals, as shown here.
>>> Need a space between the references (to stop idnits complaining)

---

2.  Path Segment

   A Path Segment is a single label that is assigned from the Segment
   Routing Local Block (SRLB) or Segment Routing Global Block (SRGB) of
   the egress node of an SR path.  It means that the Path Segment is
   unique in the context of the egress node of the SR path.  When Path
>>> s/When/When a/
   Segment is used, the Path Segment MUST be inserted at the ingress
   node and MUST immediately follow the last label of the SR path.  The
   Path Segment may be used to identify an SR-MPLS Policy, its
   Candidate-Path (CP) or a SID List (SL)
>>> s/(CP)/(CP),/
   [I-D.ietf-spring-segment-routing-policy] terminating on an egress
   node depending on the use-case.

OLD
   The value of the TTL field of the Path Segment MUST be set to the
   same value of the last segment label of the SR path.  If the Path
   Segment is the bottom label, the S bit MUST be set.
NEW
   The value of the TTL field in the MPLS label stack entry containing
   the Path Segment MUST be set to the same value as the TTL of the last
   label stack entry for the last segment in the SR path.  If the Path
   Segment is the bottom label, the S bit MUST be set.
END

               +--------------------+
               |       ...          |
               +--------------------+
               |      Label 1       |
               +--------------------+
               |      Label 2       |
               +--------------------+
               |       ...          |
               +--------------------+
               |      Label n       |
               +--------------------+
               |     Path Segment   |
               +--------------------+
               |       ...          |
               +--------------------+

>>> Shouldn't the last entry be
               +--------------------+
               ~     Payload        ~
               +--------------------+

      Figure 1: Label Stack with Path Segment

---

6.  Path Segment for Bi-directional SR Path

   With the current SR architecture, an SR path is a unidirectional
   path.  In some scenarios, for example, mobile backhaul transport
   network, there are requirements to support bidirectional path, and
>>> s/path/paths/
   the path is normally treated as a single entity and both directions
   of the path have the same fate, for example, failure in one direction
   will result in switching at both directions.

   MPLS supports this by introducing the concepts of co-routed
   bidirectional LSP and associated bidirectional LSP.  With SR, to
   support bidirectional path, a straightforward way is to bind two
>>> s/path/paths/
   unidirectional SR paths to a single bidirectional path.  Path
   segments can be used to correlate the two unidirectional SR paths at
>>> s/segments/Segments/
   both ends of the paths.

---

7.  Path Segment for End-to-end Path Protection

   For end-to-end 1+1 path protection (i.e., Live-Live case), the egress
   node of an SR path needs to know the set of paths that constitute the
   primary and the secondary(s), in order to select the primary packet
s/y(s)/ies/
   for onward transmission, and to discard the packets from the
   secondary(s).
s/y(s)/ies/

OLD
   It is obvious that this group can be instantiated in the network by
   an SDN controller.
NEW
   It is obvious that this group can be instantiated in the network by
   an SDN controller and that the Path Segment achieves the desired
   function.
END

---


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From: Mark Smith <markzzzsmith@gmail.com>
Date: Thu, 29 Aug 2019 09:39:54 +1000
Message-ID: <CAO42Z2wyJPkYaPtRtHSo749mRdQLQb0wu3WRsiGeCQke7RNWGw@mail.gmail.com>
To: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>
Cc: SPRING WG <spring@ietf.org>, IPv6 List <ipv6@ietf.org>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-05.txt
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Hi Ron,

In an email a while back I think you mentioned that the SID space is
unique in the context of an address, where as this draft is saying
that SIDs have node-local significance, which I think means the same
single SID space across all the addresses of the node.

The reason I'm wondering is that if the SID space is per-address, then
I'd think it could be possible to have a single 16 bit SID space,
rather than two sizes and needing an operator to make a choice (with
the risk of making an incorrect choice, and the consequences of having
to migrate a network from one size to another).

If 16 bits is enough for TCP/UDP etc. ports in most cases then I'd
guess it would probably be enough for SIDs. Of course, as with running
out of TCP/UDP port numbers, an operator could give a node or
interface another IPv6 address to create another 16 bit SID space if
necessary.


I also remember from that email you mentioning the idea of unique
link-local addresses. If IPv6 implementations follow RFC 8064,
"Recommendation on Stable IPv6 Interface Identifiers", which
recommends RFC 7217, "A Method for Generating Semantically Opaque
Interface Identifiers with IPv6 Stateless Address Autoconfiguration
(SLAAC)", then nodes' link-local addresses (specifically the IID part)
should not only be network wide unique, but also globally unique.

Regards,
Mark.

On Thu, 29 Aug 2019 at 01:38, Ron Bonica
<rbonica=3D40juniper.net@dmarc.ietf.org> wrote:
>
> FYI
>
>
> Juniper Public
>
> -----Original Message-----
> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: Wednesday, August 28, 2019 11:31 AM
> To: Ron Bonica <rbonica@juniper.net>; Shraddha Hegde <shraddha@juniper.ne=
t>; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Gang Chen <phdgang@gma=
il.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.al=
ston@liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidtelecom.c=
om>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
> Subject: New Version Notification for draft-bonica-spring-srv6-plus-05.tx=
t
>
>
> A new version of I-D, draft-bonica-spring-srv6-plus-05.txt
> has been successfully submitted by Ron Bonica and posted to the IETF repo=
sitory.
>
> Name:           draft-bonica-spring-srv6-plus
> Revision:       05
> Title:          IPv6 Support for Segment Routing: SRv6+
> Document date:  2019-08-28
> Group:          Individual Submission
> Pages:          23
>
>
> Abstract:
>    This document describes SRv6+. SRv6+ is a Segment Routing (SR)
>    solution that leverages IPv6.  It supports a wide variety of use-
>    cases while remaining in strict compliance with IPv6 specifications.
>    SRv6+ is optimized for ASIC-based forwarding devices that operate at
>    high data rates.
>
>
>
>
> Please note that it may take a couple of minutes from the time of submiss=
ion until the htmlized version and diff are available at tools.ietf.org.
>
> The IETF Secretariat
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------


From nobody Wed Aug 28 18:50:45 2019
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To: Mark Smith <markzzzsmith@gmail.com>
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References: <156700628554.1233.13341317295523968354.idtracker@ietfa.amsl.com> <BYAPR05MB546360166E8DE83DE67B7843AEA30@BYAPR05MB5463.namprd05.prod.outlook.com> <CAO42Z2wyJPkYaPtRtHSo749mRdQLQb0wu3WRsiGeCQke7RNWGw@mail.gmail.com>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-05.txt
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Mark, I had missed the earlier email suggesting that the SIDs could be 
address specific rather than just node specific.  That is an interesting 
idea.  At first glance, it appears to work, and warrants further thought.

As far as I know, routers tend not to use SLAAC for interface address 
generation, and tend not to be worried about the privacy properties of 
their interface addresses, so at least for most use cases I am having 
trouble following your last paragraph.

Thank you,
Joel

On 8/28/2019 7:39 PM, Mark Smith wrote:
> Hi Ron,
> 
> In an email a while back I think you mentioned that the SID space is
> unique in the context of an address, where as this draft is saying
> that SIDs have node-local significance, which I think means the same
> single SID space across all the addresses of the node.
> 
> The reason I'm wondering is that if the SID space is per-address, then
> I'd think it could be possible to have a single 16 bit SID space,
> rather than two sizes and needing an operator to make a choice (with
> the risk of making an incorrect choice, and the consequences of having
> to migrate a network from one size to another).
> 
> If 16 bits is enough for TCP/UDP etc. ports in most cases then I'd
> guess it would probably be enough for SIDs. Of course, as with running
> out of TCP/UDP port numbers, an operator could give a node or
> interface another IPv6 address to create another 16 bit SID space if
> necessary.
> 
> 
> I also remember from that email you mentioning the idea of unique
> link-local addresses. If IPv6 implementations follow RFC 8064,
> "Recommendation on Stable IPv6 Interface Identifiers", which
> recommends RFC 7217, "A Method for Generating Semantically Opaque
> Interface Identifiers with IPv6 Stateless Address Autoconfiguration
> (SLAAC)", then nodes' link-local addresses (specifically the IID part)
> should not only be network wide unique, but also globally unique.
> 
> Regards,
> Mark.
> 
> On Thu, 29 Aug 2019 at 01:38, Ron Bonica
> <rbonica=40juniper.net@dmarc.ietf.org> wrote:
>>
>> FYI
>>
>>
>> Juniper Public
>>
>> -----Original Message-----
>> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
>> Sent: Wednesday, August 28, 2019 11:31 AM
>> To: Ron Bonica <rbonica@juniper.net>; Shraddha Hegde <shraddha@juniper.net>; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Gang Chen <phdgang@gmail.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.alston@liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidtelecom.com>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
>> Subject: New Version Notification for draft-bonica-spring-srv6-plus-05.txt
>>
>>
>> A new version of I-D, draft-bonica-spring-srv6-plus-05.txt
>> has been successfully submitted by Ron Bonica and posted to the IETF repository.
>>
>> Name:           draft-bonica-spring-srv6-plus
>> Revision:       05
>> Title:          IPv6 Support for Segment Routing: SRv6+
>> Document date:  2019-08-28
>> Group:          Individual Submission
>> Pages:          23
>>
>>
>> Abstract:
>>     This document describes SRv6+. SRv6+ is a Segment Routing (SR)
>>     solution that leverages IPv6.  It supports a wide variety of use-
>>     cases while remaining in strict compliance with IPv6 specifications.
>>     SRv6+ is optimized for ASIC-based forwarding devices that operate at
>>     high data rates.
>>
>>
>>
>>
>> Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.
>>
>> The IETF Secretariat
>> --------------------------------------------------------------------
>> IETF IPv6 working group mailing list
>> ipv6@ietf.org
>> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
>> --------------------------------------------------------------------
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
> 


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From: Mark Smith <markzzzsmith@gmail.com>
Date: Thu, 29 Aug 2019 12:54:56 +1000
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To: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [spring] FW: New Version Notification for draft-bonica-spring-srv6-plus-05.txt
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Hi Joel,

On Thu, 29 Aug 2019 at 11:50, Joel M. Halpern <jmh@joelhalpern.com> wrote:
>
> Mark, I had missed the earlier email suggesting that the SIDs could be
> address specific rather than just node specific.  That is an interesting
> idea.  At first glance, it appears to work, and warrants further thought.
>

I like the idea of having one-size-fits-most or one-size-fits-all
parameters or rather constants if possible, as it means one less
decision, and one less decision that could be wrong and then costly to
fix.

With per-address SID space, you could then use aggregate prefixes to
give a range of addresses and their SIDs some sort of significance
that may be operationally or business useful.

For example, I think ULAs should be used for the outer SR packet
addressing to help mitigate SR traffic leaking or its effects, and
since you can generate multiple of your own unique ULA /48s, you could
do something like have a SR ULA /48 per country, region etc., or
perhaps a ULA /48 per SR service type or type group.


> As far as I know, routers tend not to use SLAAC for interface address
> generation, and tend not to be worried about the privacy properties of
> their interface addresses, so at least for most use cases I am having
> trouble following your last paragraph.
>

They might not be using the SLAAC "protocol" i.e. RA PIOs, however
they are supposed to be using the SLAAC method to generate their
Link-Local addresses.

RFC 4862, "IPv6 Stateless Address Autoconfiguration":

"The autoconfiguration process specified in this document applies only
   to hosts and not routers.  Since host autoconfiguration uses
   information advertised by routers, routers will need to be configured
   by some other means.  However, it is expected that routers will
   generate link-local addresses using the mechanism described in this
   document.  In addition, routers are expected to successfully pass the
   Duplicate Address Detection procedure described in this document on
   all addresses prior to assigning them to an interface."

RFC 7217 naturally applies to routers too due to their use of SLAAC
above, including their link-local addresses. The specific idea was to
be able to couple a router's interface addresses to something else
independent of interface MAC address, such as module slot, so that
swapping a router interface module didn't cause the IPv6 interface
addresses to change.

Of course you can avoid that problem by configuring static IPv6
addresses on router interfaces, although it's work a computer could do
instead, and I wonder how often people have typed in fe80::1 when they
really meant to type in fe80::2? DAD would catch it, however it's
better to avoid a problem.

I'm pretty sure globally unique Link-Local IIDs weren't a goal of RFC
7217, however I think they're useful because within your network they
can be come a network wide IPv6 interface identifier independent of
GUA/ULA addresses.

Their local network uniqueness also means they could be put in a local
instance of authoritative reverse DNS for fe80::/10 e.g. PTR
<intfname>.<routername>. That could be useful during troubleshooting
e.g. have an end-user read out their default gateway's interface
address name rather than fe80::<blah>. (fe80::1 is good for end-users
to read or type, but tells you nothing link or router specific. )

Regards,
Mark.


> Thank you,
> Joel
>
> On 8/28/2019 7:39 PM, Mark Smith wrote:
> > Hi Ron,
> >
> > In an email a while back I think you mentioned that the SID space is
> > unique in the context of an address, where as this draft is saying
> > that SIDs have node-local significance, which I think means the same
> > single SID space across all the addresses of the node.
> >
> > The reason I'm wondering is that if the SID space is per-address, then
> > I'd think it could be possible to have a single 16 bit SID space,
> > rather than two sizes and needing an operator to make a choice (with
> > the risk of making an incorrect choice, and the consequences of having
> > to migrate a network from one size to another).
> >
> > If 16 bits is enough for TCP/UDP etc. ports in most cases then I'd
> > guess it would probably be enough for SIDs. Of course, as with running
> > out of TCP/UDP port numbers, an operator could give a node or
> > interface another IPv6 address to create another 16 bit SID space if
> > necessary.
> >
> >
> > I also remember from that email you mentioning the idea of unique
> > link-local addresses. If IPv6 implementations follow RFC 8064,
> > "Recommendation on Stable IPv6 Interface Identifiers", which
> > recommends RFC 7217, "A Method for Generating Semantically Opaque
> > Interface Identifiers with IPv6 Stateless Address Autoconfiguration
> > (SLAAC)", then nodes' link-local addresses (specifically the IID part)
> > should not only be network wide unique, but also globally unique.
> >
> > Regards,
> > Mark.
> >
> > On Thu, 29 Aug 2019 at 01:38, Ron Bonica
> > <rbonica=3D40juniper.net@dmarc.ietf.org> wrote:
> >>
> >> FYI
> >>
> >>
> >> Juniper Public
> >>
> >> -----Original Message-----
> >> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> >> Sent: Wednesday, August 28, 2019 11:31 AM
> >> To: Ron Bonica <rbonica@juniper.net>; Shraddha Hegde <shraddha@juniper=
.net>; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Gang Chen <phdgang@=
gmail.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew=
.alston@liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidteleco=
m.com>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
> >> Subject: New Version Notification for draft-bonica-spring-srv6-plus-05=
.txt
> >>
> >>
> >> A new version of I-D, draft-bonica-spring-srv6-plus-05.txt
> >> has been successfully submitted by Ron Bonica and posted to the IETF r=
epository.
> >>
> >> Name:           draft-bonica-spring-srv6-plus
> >> Revision:       05
> >> Title:          IPv6 Support for Segment Routing: SRv6+
> >> Document date:  2019-08-28
> >> Group:          Individual Submission
> >> Pages:          23
> >>
> >>
> >> Abstract:
> >>     This document describes SRv6+. SRv6+ is a Segment Routing (SR)
> >>     solution that leverages IPv6.  It supports a wide variety of use-
> >>     cases while remaining in strict compliance with IPv6 specification=
s.
> >>     SRv6+ is optimized for ASIC-based forwarding devices that operate =
at
> >>     high data rates.
> >>
> >>
> >>
> >>
> >> Please note that it may take a couple of minutes from the time of subm=
ission until the htmlized version and diff are available at tools.ietf.org.
> >>
> >> The IETF Secretariat
> >> --------------------------------------------------------------------
> >> IETF IPv6 working group mailing list
> >> ipv6@ietf.org
> >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> >> --------------------------------------------------------------------
> >
> > --------------------------------------------------------------------
> > IETF IPv6 working group mailing list
> > ipv6@ietf.org
> > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> > --------------------------------------------------------------------
> >


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From: li zhenqiang <li_zhenqiang@hotmail.com>
To: draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension-header-insertion@ietf.org>, draft-ietf-spring-srv6-network-programming <draft-ietf-spring-srv6-network-programming@ietf.org>, "6man@ietf.org" <6man@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: Question about SRv6 Insert function
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Subject: [spring] Question about SRv6 Insert function
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dgb2312">
<style>body { line-height: 1.5; }body { font-size: 10.5pt; font-family: =CE=
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<div><span></span>Hello all,</div>
<div><br>
</div>
<div>End.B6.Insert specified in draft-ietf-spring-srv6-network-programming-=
01 will insert a new SRH in the received IPv6 packet, which results in two =
SRHs in one IPv6 packet. It is contradict with RFC8200 that says&nbsp;<span=
 style=3D"background-color: transparent;">Each
 extension header should occur at most once, except for the&nbsp;</span><sp=
an style=3D"font-size: 10.5pt; line-height: 1.5; background-color: transpar=
ent;">Destination Options header.</span></div>
<div><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;"><br>
</span></div>
<div><span style=3D"background-color: transparent;">In draft-voyer-6man-ext=
ension-header-insertion-06, an intermediate node executes the insert functi=
on&nbsp;</span><span style=3D"background-color: transparent;">to implement =
a&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; backgroun=
d-color: transparent;">sub-50
 milliseconds FRR operation upon link failure. It is contradict with RFC820=
0 that says&nbsp;</span><span style=3D"background-color: transparent;">Exte=
nsion headers (except for the Hop-by-Hop Options header) are not&nbsp;</spa=
n><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: tra=
nsparent;">processed,
 inserted, or deleted by any node along a packet=A1=AFs delivery&nbsp;</spa=
n><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: tra=
nsparent;">path, until the packet reaches the node (or each of the set of n=
odes,&nbsp;</span><span style=3D"font-size: 10.5pt; line-height: 1.5; backg=
round-color: transparent;">in
 the case of multicast) identified in the Destination Address field&nbsp;</=
span><span style=3D"font-size: 10.5pt; line-height: 1.5; background-color: =
transparent;">of the IPv6 header.</span></div>
<div><br>
</div>
<div>Best Regards,</div>
<div>Zhenqiang Li</div>
<hr style=3D"width: 210px; height: 1px;" color=3D"#b5c4df" size=3D"1" align=
=3D"left">
<div><span>
<div style=3D"MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<div>li_zhenqiang@hotmail.com</div>
</div>
</span></div>
</body>
</html>

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From: Ole Troan <otroan@employees.org>
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Cc: draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension-header-insertion@ietf.org>,  draft-ietf-spring-srv6-network-programming <draft-ietf-spring-srv6-network-programming@ietf.org>,  "6man@ietf.org" <6man@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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To: li zhenqiang <li_zhenqiang@hotmail.com>
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Subject: Re: [spring] Question about SRv6 Insert function
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> End.B6.Insert specified in =
draft-ietf-spring-srv6-network-programming-01 will insert a new SRH in =
the received IPv6 packet, which results in two SRHs in one IPv6 packet. =
It is contradict with RFC8200 that says Each extension header should =
occur at most once, except for the Destination Options header.
>=20
> In draft-voyer-6man-extension-header-insertion-06, an intermediate =
node executes the insert function to implement a sub-50 milliseconds FRR =
operation upon link failure. It is contradict with RFC8200 that says =
Extension headers (except for the Hop-by-Hop Options header) are not =
processed, inserted, or deleted by any node along a packet=E2=80=99s =
delivery path, until the packet reaches the node (or each of the set of =
nodes, in the case of multicast) identified in the Destination Address =
field of the IPv6 header.

I think how you look at the host stack may influence how you view these =
restrictions.
Take the example of GSO where an application asks the NIC to do TCP =
segmentation on its behalf. Or IPsec inserts headers at L3.
Likewise the originator of a packet could "offload" this function =
further down the stack or even to another entity. Bump in the stack, =
Bump in the wire.

Best regards,
Ole




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From: Ron Bonica <rbonica@juniper.net>
To: "Wang, Weibin (NSB - CN/Shanghai)" <weibin.wang@nokia-sbell.com>, SPRING WG <spring@ietf.org>, IPv6 List <ipv6@ietf.org>
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Subject: Re: [spring] New Version Notification for draft-bonica-spring-srv6-plus-05.txt
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Hi Wang,

I think that we are in agreement about how thing actually work. For example=
, assume the following:

- An SRv6+ domain contains Nodes A-Z
- On Node A, an network operator configures a node segment endpoint and ass=
ociates the node segment endpoint with SID A
- IS-IS floods the node segment endpoint and SID throughout the IGP domain
- Node B builds Node Segment B-A and associates SID A with that segment=20
- Node C builds Node Segment C-A and associates SID A with that segment=20
- And so on until Node Z builds Node Segment Z-A and associates SID A with =
that segment=20

I think that our disagreement is whether SID A, above, is a global SID or a=
 node local SID.=20

If you think that a SID identifies a segment, then it is node-local. This i=
s because a single SID (i.e., A) identifies 25 different segments (i.e., Se=
gments B-A through Z-A).=20

If you think that a SID identifies an instruction that a) can be instantiat=
ed on multiple nodes and b) forwards a packet from the node upon which it i=
s instantiated to Node A, then t is global.

Whether we call the SID local or global is really secondary, so long as we =
agree on how things work. If the text confuses the WG, I would be happy to =
change it.

                                                                           =
                                            Ron


Juniper Public

-----Original Message-----
From: Wang, Weibin (NSB - CN/Shanghai) <weibin.wang@nokia-sbell.com>=20
Sent: Friday, August 30, 2019 10:23 AM
To: Ron Bonica <rbonica@juniper.net>; SPRING WG <spring@ietf.org>; IPv6 Lis=
t <ipv6@ietf.org>
Subject: RE: New Version Notification for draft-bonica-spring-srv6-plus-05.=
txt

Ron:

I still feel that all SID (including adj SID as well as Node SID) is node-l=
ocal significance in your SRv6+ draft May be a problem, even if you has exp=
lained it previously.

>From my understanding, the Node SID (for loopback@) must be global signific=
ance in SR-enabled domain, so that every Node within SRv6 domain can find t=
he least cost path to the other Node which advertising its Node segment in =
IGP extension, every Node has its Node-segment and adj-segments for itself,=
 these SIDs must be assigned by Node itself, not by other Nodes within SR-e=
nabled domain.

>From example described in section "5.1 Range" in your draft, I deduced, wit=
hin SR domain, each node must assign independently a unique SID or more for=
 other every Node from its perspective, for example, for Node 100, Node 1 c=
an assign Node SID#11 to the Node 100, and Node 3 can assign Node SID#13 to=
 Node 100, it means that Node 1 is segment ingress node for SID 11 whose in=
struction correspond to going to Node 100 via least cost path, Node 3 is se=
gment ingress node for SID 13 to Node 100, following this way, How the ingr=
ess PE node calculate the E2E SR path within domain, because the ingress PE=
 must know all different Segment SIDs assigned by every Node from its persp=
ective, that is to say, in your case, one Node must receive 4999*4999 Node =
SIDs, 4999 for each Node, in order to achieve this goal, every Node must ad=
vertise all other Nodes' Node segments assigned by itself from its perspect=
ive, but it may be not possible, because each node has to advertise lots of=
 SIDs in IGP extension, it is complex.

Although a good SIDs assigning way described in section "5.3 Assigning SIDs=
 to Node segments", but meaning of this way in fact is not same as your ess=
ential meaning of your section 5.1.  in fact you have used the global signi=
ficance of SID, and each Node assign SID to itself and in further advertisi=
ng it in IGP extension.=20


--------------------------------------
Thank you !


WANG Weibin =20

-----Original Message-----
From: spring <spring-bounces@ietf.org> On Behalf Of Ron Bonica
Sent: 2019=1B$BG/=1B(B8=1B$B7n=1B(B28=1B$BF|=1B(B 23:38
To: SPRING WG <spring@ietf.org>; IPv6 List <ipv6@ietf.org>
Subject: [spring] FW: New Version Notification for draft-bonica-spring-srv6=
-plus-05.txt

FYI


Juniper Public

-----Original Message-----
From: internet-drafts@ietf.org <internet-drafts@ietf.org>=20
Sent: Wednesday, August 28, 2019 11:31 AM
To: Ron Bonica <rbonica@juniper.net>; Shraddha Hegde <shraddha@juniper.net>=
; Andrew Alston <Andrew.Alston@liquidtelecom.com>; Gang Chen <phdgang@gmail=
.com>; Joel Halpern <joel.halpern@ericsson.com>; Andrew Alston <andrew.alst=
on@liquidtelecom.com>; Daniam Henriques <daniam.henriques@liquidtelecom.com=
>; Jen Linkova <furry@google.com>; Yuji Kamite <y.kamite@ntt.com>
Subject: New Version Notification for draft-bonica-spring-srv6-plus-05.txt


A new version of I-D, draft-bonica-spring-srv6-plus-05.txt
has been successfully submitted by Ron Bonica and posted to the IETF reposi=
tory.

Name:		draft-bonica-spring-srv6-plus
Revision:	05
Title:		IPv6 Support for Segment Routing: SRv6+
Document date:	2019-08-28
Group:		Individual Submission
Pages:		23
=20

Abstract:
   This document describes SRv6+. SRv6+ is a Segment Routing (SR)
   solution that leverages IPv6.  It supports a wide variety of use-
   cases while remaining in strict compliance with IPv6 specifications.
   SRv6+ is optimized for ASIC-based forwarding devices that operate at
   high data rates.

                                                                           =
      =20


Please note that it may take a couple of minutes from the time of submissio=
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=20


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From: Ron Bonica <rbonica@juniper.net>
To: li zhenqiang <li_zhenqiang@hotmail.com>, draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension-header-insertion@ietf.org>, draft-ietf-spring-srv6-network-programming <draft-ietf-spring-srv6-network-programming@ietf.org>, "6man@ietf.org" <6man@ietf.org>, "spring@ietf.org" <spring@ietf.org>
Thread-Topic: Question about SRv6 Insert function
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Archived-At: <https://mailarchive.ietf.org/arch/msg/spring/iQnp3lpoJHWIyU8zl2beO3DktAc>
Subject: Re: [spring] Question about SRv6 Insert function
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Li,

In the scenarios that you mention, below, SRv6 nodes have the following opt=
ions:


  1.  To prepend and IPv6 header, with its own SRH
  2.  To insert an SRH, as described below

Option 1 is in keeping with the word and spirit of RFC 8200. As you point o=
ut, Option 2 contradicts RFC 8200.

So, we should probably explore the motivation for Option 2). If the motivat=
ion is not sufficient, we should probably standardize on Option 1.

                                                                           =
                                    Ron




Juniper Business Use Only
From: spring <spring-bounces@ietf.org> On Behalf Of li zhenqiang
Sent: Friday, August 30, 2019 5:53 AM
To: draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension=
-header-insertion@ietf.org>; draft-ietf-spring-srv6-network-programming <dr=
aft-ietf-spring-srv6-network-programming@ietf.org>; 6man@ietf.org; spring@i=
etf.org
Subject: [spring] Question about SRv6 Insert function

Hello all,

End.B6.Insert specified in draft-ietf-spring-srv6-network-programming-01 wi=
ll insert a new SRH in the received IPv6 packet, which results in two SRHs =
in one IPv6 packet. It is contradict with RFC8200 that says Each extension =
header should occur at most once, except for the Destination Options header=
.

In draft-voyer-6man-extension-header-insertion-06, an intermediate node exe=
cutes the insert function to implement a sub-50 milliseconds FRR operation =
upon link failure. It is contradict with RFC8200 that says Extension header=
s (except for the Hop-by-Hop Options header) are not processed, inserted, o=
r deleted by any node along a packet's delivery path, until the packet reac=
hes the node (or each of the set of nodes, in the case of multicast) identi=
fied in the Destination Address field of the IPv6 header.

Best Regards,
Zhenqiang Li
________________________________
li_zhenqiang@hotmail.com<mailto:li_zhenqiang@hotmail.com>

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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US">Li,<o:p></o:p></span></p=
>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US">In the scenarios that yo=
u mention, below, SRv6 nodes have the following options:<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<ol style=3D"margin-top:0in" start=3D"1" type=3D"1">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l1 level1 =
lfo3"><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-=
serif;mso-fareast-language:EN-US">To prepend and IPv6 header, with its own =
SRH<o:p></o:p></span></li><li class=3D"MsoListParagraph" style=3D"margin-le=
ft:0in;mso-list:l1 level1 lfo3"><span style=3D"font-size:11.0pt;font-family=
:&quot;Calibri&quot;,sans-serif;mso-fareast-language:EN-US">To insert an SR=
H, as described below<o:p></o:p></span></li></ol>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US">Option 1 is in keeping w=
ith the word and spirit of RFC 8200. As you point out, Option 2 contradicts=
 RFC 8200.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US">So, we should probably e=
xplore the motivation for Option 2). If the motivation is not sufficient, w=
e should probably standardize on Option 1.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US">&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ron<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif;mso-fareast-language:EN-US"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"msipfooter30b3d538" align=3D"center" style=3D"margin:0in;margin=
-bottom:.0001pt;text-align:center">
<span style=3D"font-size:7.0pt;color:black">Juniper Business Use Only</span=
><o:p></o:p></p>
<div>
<div style=3D"border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quot=
;Calibri&quot;,sans-serif">From:</span></b><span style=3D"font-size:11.0pt;=
font-family:&quot;Calibri&quot;,sans-serif"> spring &lt;spring-bounces@ietf=
.org&gt;
<b>On Behalf Of </b>li zhenqiang<br>
<b>Sent:</b> Friday, August 30, 2019 5:53 AM<br>
<b>To:</b> draft-voyer-6man-extension-header-insertion &lt;draft-voyer-6man=
-extension-header-insertion@ietf.org&gt;; draft-ietf-spring-srv6-network-pr=
ogramming &lt;draft-ietf-spring-srv6-network-programming@ietf.org&gt;; 6man=
@ietf.org; spring@ietf.org<br>
<b>Subject:</b> [spring] Question about SRv6 Insert function<o:p></o:p></sp=
an></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Hello all,<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">End.B6.Insert specified in draf=
t-ietf-spring-srv6-network-programming-01 will insert a new SRH in the rece=
ived IPv6 packet, which results in two SRHs in
 one IPv6 packet. It is contradict with RFC8200 that says&nbsp;Each extensi=
on header should occur at most once, except for the&nbsp;Destination Option=
s header.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">In draft-voyer-6man-extension-h=
eader-insertion-06, an intermediate node executes the insert function&nbsp;=
to implement a&nbsp;sub-50 milliseconds FRR operation upon
 link failure. It is contradict with RFC8200 that says&nbsp;Extension heade=
rs (except for the Hop-by-Hop Options header) are not&nbsp;processed, inser=
ted, or deleted by any node along a packet<span lang=3D"ZH-CN">&#8217;</spa=
n>s delivery&nbsp;path, until the packet reaches the node
 (or each of the set of nodes,&nbsp;in the case of multicast) identified in=
 the Destination Address field&nbsp;of the IPv6 header.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Best Regards,<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Mi=
crosoft YaHei&quot;,sans-serif;color:black">Zhenqiang Li<o:p></o:p></span><=
/p>
</div>
<div>
<div class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;=
Microsoft YaHei&quot;,sans-serif;color:black">
<hr size=3D"1" width=3D"168" style=3D"width:1.75in" noshade=3D"" style=3D"c=
olor:#B5C4DF" align=3D"left">
</span></div>
</div>
<div>
<div style=3D"margin-left:7.5pt;margin-top:7.5pt;margin-right:7.5pt;margin-=
bottom:7.5pt">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Ve=
rdana&quot;,sans-serif;color:black"><a href=3D"mailto:li_zhenqiang@hotmail.=
com">li_zhenqiang@hotmail.com</a><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</body>
</html>

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From: "Zafar Ali (zali)" <zali@cisco.com>
To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>
CC: "Zafar Ali (zali)" <zali@cisco.com>
Thread-Topic: [spring] Beyond SRv6.
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Subject: Re: [spring] Beyond SRv6.
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From nobody Fri Aug 30 23:29:19 2019
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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sat, 31 Aug 2019 16:28:49 +1000
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To: Ole Troan <otroan@employees.org>
Cc: li zhenqiang <li_zhenqiang@hotmail.com>,  draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension-header-insertion@ietf.org>,  "6man@ietf.org" <6man@ietf.org>, "spring@ietf.org" <spring@ietf.org>,  draft-ietf-spring-srv6-network-programming <draft-ietf-spring-srv6-network-programming@ietf.org>
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Subject: Re: [spring] Question about SRv6 Insert function
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Hi Ole,

On Fri, 30 Aug 2019 at 20:25, Ole Troan <otroan@employees.org> wrote:
>
> > End.B6.Insert specified in draft-ietf-spring-srv6-network-programming-0=
1 will insert a new SRH in the received IPv6 packet, which results in two S=
RHs in one IPv6 packet. It is contradict with RFC8200 that says Each extens=
ion header should occur at most once, except for the Destination Options he=
ader.
> >
> > In draft-voyer-6man-extension-header-insertion-06, an intermediate node=
 executes the insert function to implement a sub-50 milliseconds FRR operat=
ion upon link failure. It is contradict with RFC8200 that says Extension he=
aders (except for the Hop-by-Hop Options header) are not processed, inserte=
d, or deleted by any node along a packet=E2=80=99s delivery path, until the=
 packet reaches the node (or each of the set of nodes, in the case of multi=
cast) identified in the Destination Address field of the IPv6 header.
>
> I think how you look at the host stack may influence how you view these r=
estrictions.
> Take the example of GSO where an application asks the NIC to do TCP segme=
ntation on its behalf. Or IPsec inserts headers at L3.
> Likewise the originator of a packet could "offload" this function further=
 down the stack or even to another entity. Bump in the stack, Bump in the w=
ire.
>

I don't think bump-in-the-wire applies.

The trouble with a bump-in-the-wire scenario is that it is IP level
anonymous modification of packets at the IP layer. There is no
attribution in the packet of the device that performed the
modification. That lack of attribution is the thing that causes PMTUD,
IPsec etc. to fail. It makes troubleshooting much harder if the
troubleshooter is distant from the anonymous modification device.

The IPsec RFC seems to recognise this, and says that if
bump-in-the-wire device is used for more than one host (implied by
"router" or "firewall"), then the BITW implementation must act as an
IPsec gateway, meaning IPsec tunnel mode, and therefore there is BITW
device attribution through the outer encapsulating IP header's source
address.

RFC 4301:

"When supporting a single
      host, it may be quite analogous to a BITS implementation, but in
      supporting a router or firewall, it must operate like a security
      gateway."


So "anonymous" BITW is limited to 1:1 with a host. That means that the
single host's IP address is acting as a proxy for the single-host
serving BITW device. Although PMTUD or IPsec would still fail, at
least troubleshooting would be easier because the BITW device would be
directly in front of the single host it is acting for.

I would be sure that the SR expectation is that there isn't going to
be a single BITW device per host performing EH insertion, 1:1, and
wouldn't accept that sort of constraint.


I think EH insertion is actually worse than NAT. In NAT, in the inside
to outside direction, the source address of the packet is overstamped
with the NAT device's own IP address.

If you're troubleshooting NAT on the inside, you can fairly easily
identify the NAT device because it's a local network device, and
likely at the network boundary. If you're troubleshooting on the
outside, then the NAT device is unambiguously identified by the source
address of the packets it is modifying.

I think Bump-in-the-Stack would comply with RFC 8200 because the bump
is in the stack of the host that originated the packet. So the source
IP address in the packet is identifying both the host and the bump in
the host, even though it may be a shim between the host's normal IP
stack and a link-layer device driver. In a bump-in-the-stack
implementation, the bump is not anonymous, nor is it ambiguous.


Regards,
Mark.


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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sat, 31 Aug 2019 18:44:49 +1000
Message-ID: <CAO42Z2xUVn5fPf=rtp5bVRJxJKQfGT0zf8cDiN-y=cVBwu-Djw@mail.gmail.com>
To: "Zafar Ali (zali)" <zali@cisco.com>
Cc: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] Beyond SRv6.
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On Sat, 31 Aug 2019 at 14:05, Zafar Ali (zali) <zali@cisco.com> wrote:
>
> Dear Chairs and the WG:
>
>
>
> The SRv6 network programming solution and its SRH encapsulation is implem=
ented on 12 hardware platforms including Merchant Silicon.
>
> Multiple providers have deployed the SRv6 network programming solution an=
d its SRH encapsulation with line-rate performance carrying a significant a=
mount of commercial traffic.
>
> Several independent interoperability reports documenting successful inter=
operability of implementation from multiple vendors exist.
>
> Implementation, deployment, and interoperability status is publicly docum=
ented in https://www.ietf.org/id/draft-matsushima-spring-srv6-deployment-st=
atus-01.txt.
>
>
>
> Most use-cases are expected to use very few SRv6 segments.
>
>
>
> In some specific use-cases, one may desire to optimize the MTU usage furt=
her.
>
> The SRv6 network programming solution and its SRH encapsulation also supp=
ort for this Optimization, through the uSID network instruction.
>
>

If I understand it correctly, the idea is that uSIDs are encoded in
the remaining bits of an IPv6 destination addresses, below a single
high order aggregate prefix?

If that is the case, then I think there are a number of issues with
this proposal.

Firstly, there are defined fields below the upper aggregate prefix for
all IPv6 address formats. They are not available for arbitrary use.

For the Link-Local Address, the bits between /10 and /64 are specified
to be set to zero.

The ULA prefix defines a fields up until /64. The most important one
is the 40 bit Global ID field, between /8 and /48,  which is required
to be pseudo-random to attempt to avoid address space collision when
two ULA domains are merged. A shorter than /48 ULA prefix impacts this
important property.

For both Global Unicast Addresses and ULA addresses, the bits between
/48 and /64 are designated the Subnet ID field.

Below that, for GUA, ULA and LLA, the following and lower 64 bits of
an IPv6 address is the 64 bit Interface Identifier (IID) field.

RFC 7136, "Significance of IPv6 Interface Identifiers", removed
requirement for the IID field to have a modified EUI-64 value,
allowing that field to be treated as an opaque 64 bit quantity
generally, and to allow end-hosts or protocols to place significance
on bits within the IID field if they chose to.

So I think uSIDs could only be legitimately placed in the lower 64 bit
IID field.

There are however reserved IID values, so any combination of uSID
values would not be able to result in any of these reserved IID
values.

"Reserved IPv6 Interface Identifiers"
https://www.iana.org/assignments/ipv6-interface-ids/ipv6-interface-ids.xhtm=
l

For all these above IPv6 address format details, and others, see RFCs
4291 (GUA, LL) and 4193 (ULA).

Regards,
Mark.



>
> I do not see the need for any new encapsulation work.
>
>
>
> Thanks
>
>
>
> Regards =E2=80=A6 Zafar
>
>
>
> From: spring <spring-bounces@ietf.org> on behalf of Rob Shakir <robjs=3D4=
0google.com@dmarc.ietf.org>
> Date: Sunday, August 4, 2019 at 5:04 PM
> To: SPRING WG List <spring@ietf.org>
> Subject: [spring] Beyond SRv6.
>
>
>
> Hi SPRING WG,
>
>
>
> Over the last 5+ years, the IETF has developed Source Packet Routing in N=
etworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) and IPv6=
 (SRv6) data planes. SR-MPLS may also be transported over IP in UDP or GRE.
>
>
>
> These encapsulations are past WG last call (in IESG or RFC Editor).
>
>
>
> During the SPRING WG meeting at IETF 105, two presentations were related =
to the reduction of the size of the SID for IPv6 dataplane:
>
>
> SRv6+ / CRH --
> https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04
>
>
> uSID --
> https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-=
usid-01
>
>
>
>
> During the IETF week, two additional drafts have been proposed:
>
>
> https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00
>
>
> https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03
>
>
>
>
> As we expressed during the meeting, it is important for the WG to underst=
and what the aims of additional encapsulations are. Thus, we think it is im=
portant that the WG should first get to a common understanding on the requi=
rements for a new IPv6 data plane with a smaller SID - both from the perspe=
ctive of operators that are looking to deploy these technologies, and from =
that of the software/hardware implementation.
>
>
>
> Therefore, we would like to solicit network operators interested in SR ov=
er the IPv6 data plane to briefly introduce their:
>
>
> use case (e.g. Fast Reroute, explicit routing/TE)
>
>
> forwarding performance and scaling requirements
>
>
>
> e.g., (number of nodes, network diameter,
> number of SID required in max and average). For the latter, if possible u=
sing both SRv6 128-bit SIDs and shorter (e.g. 32-bit) SIDs as the number wo=
uld typically be different (*).
>
>
>
> if the existing SRv6 approach is not deployable
> in their circumstances, details of the requirement of a different solutio=
n is required and whether this solution is needed for the short term only o=
r for the long term.
>
>
>
>
> As well as deployment limitations, we would like the SPRING community to =
briefly describe the platform limitations that they are seeing which limit =
the deployment of SRv6  In particular limitations related to the number of =
SIDs which can be pushed and forwarded and how much the use of shorter SIDs=
 would improve the deployments .
>
>
>
> For both of these sets of feedback if possible, please post this to the S=
PRING WG. If the information cannot be shared publicly, please send it dire=
ctly to the chairs & AD (Martin).
>
>
>
> This call for information will run for four weeks, up to 2019/09/03. As a=
 reminder, you can reach the SPRING chairs via spring-chairs@ietf.org and A=
Ds via spring-ads@ietf.org.
>
>
>
> Thank you,
>
> -- Rob & Bruno
>
>
>
> (*) As expressed on the mailing list, a 128 bit SID can encode two instru=
ctions a node SID and an adjacency SID hence less SID may be required.
>
>
>
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


From nobody Sat Aug 31 06:41:57 2019
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From: Satoru Matsushima <satoru.matsushima@gmail.com>
In-Reply-To: <53E6C388-6DF1-42CF-A97D-98D248AB6CED@cisco.com>
Date: Sat, 31 Aug 2019 15:41:43 +0200
Cc: "Zafar Ali (zali)" <zali@cisco.com>, Rob Shakir <robjs=40google.com@dmarc.ietf.org>
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To: SPRING WG List <spring@ietf.org>
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Subject: Re: [spring] Beyond SRv6.
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Hi,

As part of the 5G rollout, Softbank have deployed a nationwide SRv6 =
network carrying commercial traffic with the linerate performance using =
Merchant Silicon.

https://www.softbank.jp/corp/news/press/sbkk/2019/20190424_03/

# You can read it in your language through some translation service, =
e.g, google translation.

draft-matsushima-spring-srv6-deployment-status captured that use case.

Best regards,
--satoru


> 2019/08/31 6:05=E3=80=81Zafar Ali (zali) <zali@cisco.com>=E3=81=AE=E3=83=
=A1=E3=83=BC=E3=83=AB:
>=20
> Dear Chairs and the WG:=20
> =20
> The SRv6 network programming solution and its SRH encapsulation is =
implemented on 12 hardware platforms including Merchant Silicon.
> Multiple providers have deployed the SRv6 network programming solution =
and its SRH encapsulation with line-rate performance carrying a =
significant amount of commercial traffic.
> Several independent interoperability reports documenting successful =
interoperability of implementation from multiple vendors exist.
> Implementation, deployment, and interoperability status is publicly =
documented =
inhttps://www.ietf.org/id/draft-matsushima-spring-srv6-deployment-status-0=
1.txt.
> =20
> Most use-cases are expected to use very few SRv6 segments.
> =20
> In some specific use-cases, one may desire to optimize the MTU usage =
further.
> The SRv6 network programming solution and its SRH encapsulation also =
support for this Optimization, through the uSID network instruction.
> =20
> I do not see the need for any new encapsulation work.
> =20
> Thanks
> =20
> Regards =E2=80=A6 Zafar=20
> =20
> From: spring <spring-bounces@ietf.org> on behalf of Rob Shakir =
<robjs=3D40google.com@dmarc.ietf.org>
> Date: Sunday, August 4, 2019 at 5:04 PM
> To: SPRING WG List <spring@ietf.org>
> Subject: [spring] Beyond SRv6.
> =20
> Hi SPRING WG,
> =20
> Over the last 5+ years, the IETF has developed Source Packet Routing =
in NetworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) =
and IPv6 (SRv6) data planes. SR-MPLS may also be transported over IP in =
UDP or GRE.
> =20
> These encapsulations are past WG last call (in IESG or RFC Editor).
> =20
> During the SPRING WG meeting at IETF 105, two presentations were =
related to the reduction of the size of the SID for IPv6 dataplane:
> 	=E2=80=A2 =20
> 	=E2=80=A2 SRv6+ / CRH --
> 	=E2=80=A2 =
https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04
> 	=E2=80=A2 =20
> 	=E2=80=A2 =20
> 	=E2=80=A2 uSID --
> 	=E2=80=A2 =
https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-u=
sid-01=20
> 	=E2=80=A2 =20
> =20
> During the IETF week, two additional drafts have been proposed:
> 	=E2=80=A2 =20
> 	=E2=80=A2 =
https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00=20
> 	=E2=80=A2 =20
> 	=E2=80=A2 =20
> 	=E2=80=A2 =
https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03=20
> 	=E2=80=A2 =20
> =20
> As we expressed during the meeting, it is important for the WG to =
understand what the aims of additional encapsulations are. Thus, we =
think it is important that the WG should first get to a common =
understanding on the requirements for a new IPv6 data plane with a =
smaller SID - both from the perspective of operators that are looking to =
deploy these technologies, and from that of the software/hardware =
implementation.
> =20
> Therefore, we would like to solicit network operators interested in SR =
over the IPv6 data plane to briefly introduce their:
> 	=E2=80=A2 =20
> 	=E2=80=A2 use case (e.g. Fast Reroute, explicit routing/TE)
> 	=E2=80=A2 =20
> 	=E2=80=A2 =20
> 	=E2=80=A2 forwarding performance and scaling requirements
> 	=E2=80=A2 =20
> 		=E2=80=A2 =20
> 		=E2=80=A2 e.g., (number of nodes, network diameter,
> 		=E2=80=A2 number of SID required in max and average). =
For the latter, if possible using both SRv6 128-bit SIDs and shorter =
(e.g. 32-bit) SIDs as the number would typically be different (*).
> 		=E2=80=A2 =20
> 	=E2=80=A2 =20
> 	=E2=80=A2 if the existing SRv6 approach is not deployable
> 	=E2=80=A2 in their circumstances, details of the requirement of =
a different solution is required and whether this solution is needed for =
the short term only or for the long term.
> 	=E2=80=A2 =20
> =20
> As well as deployment limitations, we would like the SPRING community =
to briefly describe the platform limitations that they are seeing which =
limit the deployment of SRv6  In particular limitations related to the =
number of SIDs which can be pushed and forwarded and how much the use of =
shorter SIDs would improve the deployments .
> =20
> For both of these sets of feedback if possible, please post this to =
the SPRING WG. If the information cannot be shared publicly, please send =
it directly to the chairs & AD (Martin).
> =20
> This call for information will run for four weeks, up to 2019/09/03. =
As a reminder, you can reach the SPRING chairs viaspring-chairs@ietf.org =
and ADs via spring-ads@ietf.org.=20
> =20
> Thank you,
> -- Rob & Bruno
> =20
> (*) As expressed on the mailing list, a 128 bit SID can encode two =
instructions a node SID and an adjacency SID hence less SID may be =
required.
> =20
> _______________________________________________
> spring mailing list
> spring@ietf.org
> https://www.ietf.org/mailman/listinfo/spring


From nobody Sat Aug 31 07:10:34 2019
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To: li zhenqiang <li_zhenqiang@hotmail.com>, draft-voyer-6man-extension-header-insertion <draft-voyer-6man-extension-header-insertion@ietf.org>, draft-ietf-spring-srv6-network-programming <draft-ietf-spring-srv6-network-programming@ietf.org>, "6man@ietf.org" <6man@ietf.org>, "spring@ietf.org" <spring@ietf.org>
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From: Fernando Gont <fernando@gont.com.ar>
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Subject: Re: [spring] Question about SRv6 Insert function
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Folks,

There was a very significant discussion during the IETF LC to make it
crystal clear that IPv6 EHs cannot be inserted. This is clearly codified
in RFC8200.

Are the two documents referenced bellow going against the RFC8200 standard?

Thanks,
Fernando




On 30/8/19 12:52, li zhenqiang wrote:
> Hello all,
> 
> End.B6.Insert specified in draft-ietf-spring-srv6-network-programming-01
> will insert a new SRH in the received IPv6 packet, which results in two
> SRHs in one IPv6 packet. It is contradict with RFC8200 that saysÂ Each
> extension header should occur at most once, except for theÂ Destination
> Options header.
> 
> In draft-voyer-6man-extension-header-insertion-06, an intermediate node
> executes the insert functionÂ to implement aÂ sub-50 milliseconds FRR
> operation upon link failure. It is contradict with RFC8200 that
> saysÂ Extension headers (except for the Hop-by-Hop Options header) are
> notÂ processed, inserted, or deleted by any node along a packetâ€™s
> deliveryÂ path, until the packet reaches the node (or each of the set of
> nodes,Â in the case of multicast) identified in the Destination Address
> fieldÂ of the IPv6 header.
> 
> Best Regards,
> Zhenqiang Li
> ------------------------------------------------------------------------
> li_zhenqiang@hotmail.com
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
> 


-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
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Subject: Re: [spring] Question about SRv6 Insert function
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On 30/8/19 20:24, Ron Bonica wrote:
> Li,
> 
>  
> 
> In the scenarios that you mention, below, SRv6 nodes have the following
> options:
> 
>  
> 
>  1. To prepend and IPv6 header, with its own SRH
>  2. To insert an SRH, as described below
> 
>  
> 
> Option 1 is in keeping with the word and spirit of RFC 8200. As you
> point out, Option 2 contradicts RFC 8200.
> 
>  
> 
> So, we should probably explore the motivation for Option 2). If the
> motivation is not sufficient, we should probably standardize on Option 1.

My argument would be:
Folks would do whatever they please with 1). If somehow they feel the
need to do 2), they should *refrain from even suggesting it*, post an
internet draft that proposes to update RFC8200 to allow for the
insertion of EHs, wait for that to be adopted and published, and only
then suggest to do EH insertion.

P.S.: Given the amount of discussion there has been on this topic in the
context of RFC8200, I'd like to hope that there's no draft-ietf document
suggesting EH-insertion or, if there is, the relevant ADs and chairs
make sure that's not the case anymore.

Thanks!

Cheers,
-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1




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From: Ron Bonica <rbonica@juniper.net>
To: Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>, "6man@ietf.org" <6man@ietf.org>
Thread-Topic: [spring] Beyond SRv6.
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Subject: Re: [spring] Beyond SRv6.
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Rob,

The following are arguments for proceeding with SRv6+:


  *   Efficient forwarding with deep SID lists
  *   Operational Simplicity
  *   SRv6+ work may finish before SRv6

Efficient forwarding with deep SID Lists
----------------------------------------------------

SR customers have stated a firm requirement to support SR paths that contai=
n 8 to 12 segments. They have also stated a requirement for implementations=
 to forward at line speed  and without consuming excessive overhead bandwid=
th.

SRv6, as defined in draft-ietf-6man-segment-routing-header, cannot satisfy =
these requirements. In order to support an SR path with 8 segments, SRv6 wo=
uld require a 128-byte SRH. Even if ASICs could process such a long SRH at =
line speed, the bandwidth overhead would be prohibitive.

Therefore, one of the four solutions  that you mention below is required to=
 make SRv6 deployable. While draft-ietf-6man-segment-routing-header is clos=
e to maturity, the four competing solutions mentioned below are equally mat=
ure and should be given equal consideration.


The four solutions are SRv6+, uSID, draft-li and draft-mirsky.

Operational Simplicity
-----------------------------
Network operators strive for operational simplicity. By loosely interpretin=
g (and sometimes bending) the requirements of RFCs 4291 and RFC 8200, SRv6 =
introduces architectural quirks that introduce operational complexity. The =
following are architectural quirks of  draft-ietf-6man-segment-routing-head=
er:


  *   The Segment Routing Header (SRH) serves purposes other than routing. =
Therefore, the SRH is sometimes required for packets that traverse the leas=
t-cost path from source to destination
  *   The SRH and the IPv6 Authentication Header are incompatible.
  *   The IPv6 destination address determines whether an SRH is valid and h=
ow it is processed. For example, if the IPv6 destination address contains o=
ne locally instantiated value, the SRH might be processed in one particular=
 way, while if the IPv6 destination address contains another locally instan=
tiated value, the SRH might be totally invalid.

Draft-ietf-spring-srv6-network-programming  promises more architectural qui=
rks. For example:


  *   Segment endpoints can insert and/or delete IPv6 extension headers
  *   An IPv6 packet can contain two Segment Routing headers
  *   IPv6 packets are no longer self-describing. For example, the Next Hea=
der Field in the SRH can carry a value of No Next Header, even though the S=
RH is followed by Ethernet payload.

Other emerging drafts promise still more architectural quirks. For example,=
 in draft-ali-6man-spring-srv6-oam, implementations need to examine the SRH=
 even when Segment Left equals zero. This is because the SRH has been overl=
oaded to carry OAM as well as routing information.

Furthermore, draft-filsfils-spring-net-pgm-extension-srv6-usid requires net=
work operators to obtain address space and number their networks in a parti=
cular way to make routing work.

SRv6+ Work May Finish Before SRv6 work
--------------------------------------------------------
SRv6+  has been implemented on LINUX and is being implemented on JUNOS. Imp=
lementation experience demonstrates that specification is fairly complete. =
For example, there is no need for an SRv6+ OAM document. It's just IPv6 and=
 IPv6 OAM just works.

Furthermore, the SRv6+ specifications adhere to a strict interpretation of =
RFC 8200. Therefore, as they progress through the working group, they won't=
 need to overcome the objections that are inevitably encountered when stret=
ching the interpretation of a specification that is so fundamental as RFC 8=
200.

                                                                           =
                           Thanks,
                                                                           =
                               Ron








From: spring <spring-bounces@ietf.org> On Behalf Of Rob Shakir
Sent: Sunday, August 4, 2019 5:04 PM
To: SPRING WG List <spring@ietf.org>
Subject: [spring] Beyond SRv6.


Hi SPRING WG,


Over the last 5+ years, the IETF has developed Source Packet Routing in Net=
workinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) and IPv6 (=
SRv6) data planes. SR-MPLS may also be transported over IP in UDP or GRE.


These encapsulations are past WG last call (in IESG or RFC Editor).


During the SPRING WG meeting at IETF 105, two presentations were related to=
 the reduction of the size of the SID for IPv6 dataplane:

  *   SRv6+ / CRH -- https://tools.ietf.org/html/draft-bonica-spring-srv6-p=
lus-04<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.or=
g_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D04&d=3DDwMFaQ&c=3DHAkYuh63rs=
uhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwr=
DThKP8&m=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=3DKUhAfjVsx_wK645u=
Jk0FHzs2vxiAVr-CskMPAaEhEQQ&e=3D>
  *   uSID -- https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-ext=
ension-srv6-usid-01<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__=
tools.ietf.org_html_draft-2Dfilsfils-2Dspring-2Dnet-2Dpgm-2Dextension-2Dsrv=
6-2Dusid-2D01&d=3DDwMFaQ&c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=
=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=3DackZC9evRf_LWYu2a-1NaGRD=
JKdxnE2ieIC4dD_FL6s&s=3DAq1DK7fu73axZ1PXLIE8xnHE2AhTtNZy9LTHgWqx4CQ&e=3D>


During the IETF week, two additional drafts have been proposed:

  *   https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00<htt=
ps://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_dra=
ft-2Dli-2Dspring-2Dcompressed-2Dsrv6-2Dnp-2D00&d=3DDwMFaQ&c=3DHAkYuh63rsuhr=
6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDTh=
KP8&m=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=3DXWUDAD2FMhWLfeT5sgU=
b1lgthJhugcyT98GJ2N-CrKs&e=3D>
  *   https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03<https:=
//urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-=
2Dmirsky-2D6man-2Dunified-2Did-2Dsr-2D03&d=3DDwMFaQ&c=3DHAkYuh63rsuhr6Scbfh=
0UjBXeMK-ndb3voDTXcWzoCI&r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=
=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=3DgcbkHYxXm7FU7vblOB1vI58S=
DaaWf62pa7YvLmsP4nI&e=3D>


As we expressed during the meeting, it is important for the WG to understan=
d what the aims of additional encapsulations are. Thus, we think it is impo=
rtant that the WG should first get to a common understanding on the require=
ments for a new IPv6 data plane with a smaller SID - both from the perspect=
ive of operators that are looking to deploy these technologies, and from th=
at of the software/hardware implementation.


Therefore, we would like to solicit network operators interested in SR over=
 the IPv6 data plane to briefly introduce their:

  *   use case (e.g. Fast Reroute, explicit routing/TE)
  *   forwarding performance and scaling requirements

     *   e.g., (number of nodes, network diameter, number of SID required i=
n max and average). For the latter, if possible using both SRv6 128-bit SID=
s and shorter (e.g. 32-bit) SIDs as the number would typically be different=
 (*).

  *   if the existing SRv6 approach is not deployable in their circumstance=
s, details of the requirement of a different solution is required and wheth=
er this solution is needed for the short term only or for the long term.


As well as deployment limitations, we would like the SPRING community to br=
iefly describe the platform limitations that they are seeing which limit th=
e deployment of SRv6  In particular limitations related to the number of SI=
Ds which can be pushed and forwarded and how much the use of shorter SIDs w=
ould improve the deployments .


For both of these sets of feedback if possible, please post this to the SPR=
ING WG. If the information cannot be shared publicly, please send it direct=
ly to the chairs & AD (Martin).


This call for information will run for four weeks, up to 2019/09/03. As a r=
eminder, you can reach the SPRING chairs via spring-chairs@ietf.org<mailto:=
spring-chairs@ietf.org> and ADs via spring-ads@ietf.org<mailto:spring-ads@i=
etf.org>.


Thank you,

-- Rob & Bruno


(*) As expressed on the mailing list, a 128 bit SID can encode two instruct=
ions a node SID and an adjacency SID hence less SID may be required.



Juniper Business Use Only

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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Rob,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The following are arguments for proceeding with SRv6=
&#43;:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l2 level1 =
lfo1">Efficient forwarding with deep SID lists<o:p></o:p></li><li class=3D"=
MsoListParagraph" style=3D"margin-left:0in;mso-list:l2 level1 lfo1">Operati=
onal Simplicity<o:p></o:p></li><li class=3D"MsoListParagraph" style=3D"marg=
in-left:0in;mso-list:l2 level1 lfo1">SRv6&#43; work may finish before SRv6<=
o:p></o:p></li></ul>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Efficient forwarding with deep SID Lists<o:p></o:p><=
/p>
<p class=3D"MsoNormal">----------------------------------------------------=
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">SR customers have stated a firm requirement to suppo=
rt SR paths that contain 8 to 12 segments. They have also stated a requirem=
ent for implementations to forward at line speed &nbsp;and without consumin=
g excessive overhead bandwidth.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">SRv6, as defined in draft-ietf-6man-segment-routing-=
header, cannot satisfy these requirements. In order to support an SR path w=
ith 8 segments, SRv6 would require a 128-byte SRH. Even if ASICs could proc=
ess such a long SRH at line speed,
 the bandwidth overhead would be prohibitive.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Therefore, one of the four solutions &nbsp;that you =
mention below is required to make SRv6 deployable. While draft-ietf-6man-se=
gment-routing-header is close to maturity, the four competing solutions men=
tioned below are equally mature and should
 be given equal consideration.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">The four solutions are SRv6&#43;, u=
SID, draft-li and draft-mirsky.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Operational Simplicity<o:p></o:p></p>
<p class=3D"MsoNormal">----------------------------- <o:p></o:p></p>
<p class=3D"MsoNormal">Network operators strive for operational simplicity.=
 By loosely interpreting (and sometimes bending) the requirements of RFCs 4=
291 and RFC 8200, SRv6 introduces architectural quirks that introduce opera=
tional complexity. The following are
 architectural quirks of &nbsp;draft-ietf-6man-segment-routing-header:<o:p>=
</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l2 level1 =
lfo1">The Segment Routing Header (SRH) serves purposes other than routing. =
Therefore, the SRH is sometimes required for packets that traverse the leas=
t-cost path from source to destination<o:p></o:p></li><li class=3D"MsoListP=
aragraph" style=3D"margin-left:0in;mso-list:l2 level1 lfo1">The SRH and the=
 IPv6 Authentication Header are incompatible.<o:p></o:p></li><li class=3D"M=
soListParagraph" style=3D"margin-left:0in;mso-list:l2 level1 lfo1">The IPv6=
 destination address determines whether an SRH is valid and how it is proce=
ssed. For example, if the IPv6 destination address contains one locally ins=
tantiated value, the SRH
 might be processed in one particular way, while if the IPv6 destination ad=
dress contains another locally instantiated value, the SRH might be totally=
 invalid.<o:p></o:p></li></ul>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Draft-ietf-spring-srv6-network-programming &nbsp;pro=
mises more architectural quirks. For example:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-list:l2 level1 =
lfo1">Segment endpoints can insert and/or delete IPv6 extension headers<o:p=
></o:p></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-lis=
t:l2 level1 lfo1">An IPv6 packet can contain two Segment Routing headers<o:=
p></o:p></li><li class=3D"MsoListParagraph" style=3D"margin-left:0in;mso-li=
st:l2 level1 lfo1">IPv6 packets are no longer self-describing. For example,=
 the Next Header Field in the SRH can carry a value of No Next Header, even=
 though the SRH is followed by Ethernet payload.<o:p></o:p></li></ul>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Other emerging drafts promise still more architectur=
al quirks. For example, in draft-ali-6man-spring-srv6-oam, implementations =
need to examine the SRH even when Segment Left equals zero. This is because=
 the SRH has been overloaded to carry
 OAM as well as routing information.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Furthermore, draft-filsfils-spring-net-pgm-extension=
-srv6-usid requires network operators to obtain address space and number th=
eir networks in a particular way to make routing work.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">SRv6&#43; Work May Finish Before SRv6 work<o:p></o:p=
></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">---------------------=
-----------------------------------<o:p></o:p></p>
<p class=3D"MsoNormal">SRv6&#43; &nbsp;has been implemented on LINUX and is=
 being implemented on JUNOS. Implementation experience demonstrates that sp=
ecification is fairly complete. For example, there is no need for an SRv6&#=
43; OAM document. It&#8217;s just IPv6 and IPv6 OAM just
 works.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Furthermore, the SRv6&#43; specifications adhere to =
a strict interpretation of RFC 8200. Therefore, as they progress through th=
e working group, they won&#8217;t need to overcome the objections that are =
inevitably encountered when stretching the interpretation
 of a specification that is so fundamental as RFC 8200.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ron<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><b>From:</b> spring &lt;spring-bounces@ietf.org&gt; =
<b>On Behalf Of
</b>Rob Shakir<br>
<b>Sent:</b> Sunday, August 4, 2019 5:04 PM<br>
<b>To:</b> SPRING WG List &lt;spring@ietf.org&gt;<br>
<b>Subject:</b> [spring] Beyond SRv6.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">Hi SPRING WG,</span><span style=3D"=
font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">Over the last 5&#43; years, the IET=
F has developed Source Packet Routing in NetworkinG (SPRING) aka Segment Ro=
uting for both the MPLS (SR-MPLS) and IPv6 (SRv6)
 data planes. SR-MPLS may also be transported over IP in UDP or GRE.</span>=
<span style=3D"font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">These encapsulations are past WG la=
st call (in IESG or RFC Editor).</span><span style=3D"font-family:&quot;Ari=
al&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">During the SPRING WG meeting at IET=
F 105, two presentations were related to the reduction of the size of the S=
ID for IPv6 dataplane:</span><span style=3D"font-family:&quot;Arial&quot;,s=
ans-serif"><o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"color:black;mso-list:l3 level1 lfo2;vertic=
al-align:baseline;font-variant-numeric:normal;font-variant-east-asian:norma=
l">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">SRv6&#43; / CRH --=
 <a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ie=
tf.org_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D04&amp;d=3DDwMFaQ&amp;c=
=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DFch9FQ82sir-BoLx84hK=
uKwl-AWF2EfpHcAwrDThKP8&amp;m=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s=
&amp;s=3DKUhAfjVsx_wK645uJk0FHzs2vxiAVr-CskMPAaEhEQQ&amp;e=3D">
https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04</a><o:p></o:p>=
</span></li><li class=3D"MsoNormal" style=3D"color:black;mso-list:l3 level1=
 lfo2;vertical-align:baseline;font-variant-numeric:normal;font-variant-east=
-asian:normal">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">uSID -- <a href=3D=
"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html=
_draft-2Dfilsfils-2Dspring-2Dnet-2Dpgm-2Dextension-2Dsrv6-2Dusid-2D01&amp;d=
=3DDwMFaQ&amp;c=3DHAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DFch9F=
Q82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&amp;m=3DackZC9evRf_LWYu2a-1NaGRDJKdx=
nE2ieIC4dD_FL6s&amp;s=3DAq1DK7fu73axZ1PXLIE8xnHE2AhTtNZy9LTHgWqx4CQ&amp;e=
=3D">
https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-us=
id-01</a>&nbsp;<o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">During the IETF week, two additiona=
l drafts have been proposed:</span><span style=3D"font-family:&quot;Arial&q=
uot;,sans-serif"><o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"color:black;mso-list:l0 level1 lfo3;vertic=
al-align:baseline;font-variant-numeric:normal;font-variant-east-asian:norma=
l">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dli-2Dspring-2Dcompressed-2Dsrv6-2Dnp-2D00&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63r=
suhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2Efp=
HcAwrDThKP8&amp;m=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&amp;s=3DXWU=
DAD2FMhWLfeT5sgUb1lgthJhugcyT98GJ2N-CrKs&amp;e=3D">https://tools.ietf.org/h=
tml/draft-li-spring-compressed-srv6-np-00</a>&nbsp;<o:p></o:p></span></li><=
li class=3D"MsoNormal" style=3D"color:black;mso-list:l0 level1 lfo3;vertica=
l-align:baseline;font-variant-numeric:normal;font-variant-east-asian:normal=
">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"https:/=
/urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__tools.ietf.org_html_draft-2=
Dmirsky-2D6man-2Dunified-2Did-2Dsr-2D03&amp;d=3DDwMFaQ&amp;c=3DHAkYuh63rsuh=
r6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&amp;r=3DFch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcA=
wrDThKP8&amp;m=3DackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&amp;s=3DgcbkHY=
xXm7FU7vblOB1vI58SDaaWf62pa7YvLmsP4nI&amp;e=3D">https://tools.ietf.org/html=
/draft-mirsky-6man-unified-id-sr-03</a>&nbsp;<o:p></o:p></span></li></ul>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">As we expressed during the meeting,=
 it is important for the WG to understand what the aims of additional encap=
sulations are. Thus, we think it is important
 that the WG should first get to a common understanding on the requirements=
 for a new IPv6 data plane with a smaller SID - both from the perspective o=
f operators that are looking to deploy these technologies, and from that of=
 the software/hardware implementation.</span><span style=3D"font-family:&qu=
ot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">Therefore, we would like to solicit=
 network operators interested in SR over the IPv6 data plane to briefly int=
roduce their:</span><span style=3D"font-family:&quot;Arial&quot;,sans-serif=
"><o:p></o:p></span></p>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"color:black;mso-list:l1 level1 lfo4;vertic=
al-align:baseline;font-variant-numeric:normal;font-variant-east-asian:norma=
l">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">use case (e.g. Fas=
t Reroute, explicit routing/TE)<o:p></o:p></span></li><li class=3D"MsoNorma=
l" style=3D"color:black;mso-list:l1 level1 lfo4;vertical-align:baseline;fon=
t-variant-numeric:normal;font-variant-east-asian:normal">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">forwarding perform=
ance and scaling requirements<o:p></o:p></span></li></ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<ul style=3D"margin-top:0in" type=3D"circle">
<li class=3D"MsoNormal" style=3D"color:black;mso-list:l1 level2 lfo4;vertic=
al-align:baseline;font-variant-numeric:normal;font-variant-east-asian:norma=
l">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">e.g., (number of n=
odes, network diameter, number of SID required in max and average). For the=
 latter, if possible using both SRv6 128-bit SIDs and shorter (e.g. 32-bit)=
 SIDs as the number would typically be different
 (*).<o:p></o:p></span></li></ul>
</ul>
<ul style=3D"margin-top:0in" type=3D"disc">
<li class=3D"MsoNormal" style=3D"color:black;mso-list:l1 level1 lfo4;vertic=
al-align:baseline;font-variant-numeric:normal;font-variant-east-asian:norma=
l">
<span style=3D"font-family:&quot;Arial&quot;,sans-serif">if the existing SR=
v6 approach is not deployable in their circumstances, details of the requir=
ement of a different solution is required and whether this solution is need=
ed for the short term only or for the long term.<o:p></o:p></span></li></ul=
>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">As well as deployment limitations, =
we would like the SPRING community to briefly describe the platform limitat=
ions that they are seeing which limit the deployment
 of SRv6&nbsp; In particular limitations related to the number of SIDs whic=
h can be pushed and forwarded and how much the use of shorter SIDs would im=
prove the deployments .</span><span style=3D"font-family:&quot;Arial&quot;,=
sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">For both of these sets of feedback =
if possible, please post this to the SPRING WG. If the information cannot b=
e shared publicly, please send it directly to
 the chairs &amp; AD (Martin).</span><span style=3D"font-family:&quot;Arial=
&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">This call for information will run =
for four weeks, up to 2019/09/03. As a reminder, you can reach the SPRING c=
hairs via
</span><span style=3D"font-family:&quot;Arial&quot;,sans-serif"><a href=3D"=
mailto:spring-chairs@ietf.org">spring-chairs@ietf.org</a><span style=3D"col=
or:black"> and ADs via
</span><a href=3D"mailto:spring-ads@ietf.org">spring-ads@ietf.org</a><span =
style=3D"color:black">.&nbsp;</span><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">Thank you,</span><span style=3D"fon=
t-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">-- Rob &amp; Bruno</span><span styl=
e=3D"font-family:&quot;Arial&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Arial&quot;,sans-se=
rif"><o:p>&nbsp;</o:p></span></p>
<p style=3D"margin:0in;margin-bottom:.0001pt"><span style=3D"font-family:&q=
uot;Arial&quot;,sans-serif;color:black">(*) As expressed on the mailing lis=
t, a 128 bit SID can encode two instructions a node SID and an adjacency SI=
D hence less SID may be required.</span><span style=3D"font-family:&quot;Ar=
ial&quot;,sans-serif"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"msipfooter30b3d538" align=3D"center" style=3D"margin:0in;margin=
-bottom:.0001pt;text-align:center">
<span style=3D"font-size:7.0pt;color:black">Juniper Business Use Only</span=
><o:p></o:p></p>
</div>
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From nobody Sat Aug 31 13:55:24 2019
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To: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, Rob Shakir <robjs=40google.com@dmarc.ietf.org>, SPRING WG List <spring@ietf.org>, "6man@ietf.org" <6man@ietf.org>
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From: Fernando Gont <fgont@si6networks.com>
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Subject: Re: [spring] Beyond SRv6.
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Hi, Ron,

For those 6man-ers that have not been following the sprin work, could
you please clarify what do you mean by "stretching the interpretation of
RFC8200 or RFC4291"?

In the past we have seen outright violation of RFC8200 (formerly
RFC2460), so I'm curious if there are any documents trying to do the
same, or what.

Thanks!

Cheers,
Fernando




On 31/8/19 23:33, Ron Bonica wrote:
> Rob,
> 
>  
> 
> The following are arguments for proceeding with SRv6+:
> 
>  
> 
>   * Efficient forwarding with deep SID lists
>   * Operational Simplicity
>   * SRv6+ work may finish before SRv6
> 
>  
> 
> Efficient forwarding with deep SID Lists
> 
> ----------------------------------------------------
> 
>  
> 
> SR customers have stated a firm requirement to support SR paths that
> contain 8 to 12 segments. They have also stated a requirement for
> implementations to forward at line speed  and without consuming
> excessive overhead bandwidth.
> 
>  
> 
> SRv6, as defined in draft-ietf-6man-segment-routing-header, cannot
> satisfy these requirements. In order to support an SR path with 8
> segments, SRv6 would require a 128-byte SRH. Even if ASICs could process
> such a long SRH at line speed, the bandwidth overhead would be prohibitive.
> 
>  
> 
> Therefore, one of the four solutions  that you mention below is required
> to make SRv6 deployable. While draft-ietf-6man-segment-routing-header is
> close to maturity, the four competing solutions mentioned below are
> equally mature and should be given equal consideration.
> 
>  
> 
> The four solutions are SRv6+, uSID, draft-li and draft-mirsky.
> 
>  
> 
> Operational Simplicity
> 
> -----------------------------
> 
> Network operators strive for operational simplicity. By loosely
> interpreting (and sometimes bending) the requirements of RFCs 4291 and
> RFC 8200, SRv6 introduces architectural quirks that introduce
> operational complexity. The following are architectural quirks of
>  draft-ietf-6man-segment-routing-header:
> 
>  
> 
>   * The Segment Routing Header (SRH) serves purposes other than routing.
>     Therefore, the SRH is sometimes required for packets that traverse
>     the least-cost path from source to destination
>   * The SRH and the IPv6 Authentication Header are incompatible.
>   * The IPv6 destination address determines whether an SRH is valid and
>     how it is processed. For example, if the IPv6 destination address
>     contains one locally instantiated value, the SRH might be processed
>     in one particular way, while if the IPv6 destination address
>     contains another locally instantiated value, the SRH might be
>     totally invalid.
> 
>  
> 
> Draft-ietf-spring-srv6-network-programming  promises more architectural
> quirks. For example:
> 
>  
> 
>   * Segment endpoints can insert and/or delete IPv6 extension headers
>   * An IPv6 packet can contain two Segment Routing headers
>   * IPv6 packets are no longer self-describing. For example, the Next
>     Header Field in the SRH can carry a value of No Next Header, even
>     though the SRH is followed by Ethernet payload.
> 
>  
> 
> Other emerging drafts promise still more architectural quirks. For
> example, in draft-ali-6man-spring-srv6-oam, implementations need to
> examine the SRH even when Segment Left equals zero. This is because the
> SRH has been overloaded to carry OAM as well as routing information.
> 
>  
> 
> Furthermore, draft-filsfils-spring-net-pgm-extension-srv6-usid requires
> network operators to obtain address space and number their networks in a
> particular way to make routing work.
> 
>  
> 
> SRv6+ Work May Finish Before SRv6 work
> 
> --------------------------------------------------------
> 
> SRv6+  has been implemented on LINUX and is being implemented on JUNOS.
> Implementation experience demonstrates that specification is fairly
> complete. For example, there is no need for an SRv6+ OAM document. It’s
> just IPv6 and IPv6 OAM just works.
> 
>  
> 
> Furthermore, the SRv6+ specifications adhere to a strict interpretation
> of RFC 8200. Therefore, as they progress through the working group, they
> won’t need to overcome the objections that are inevitably encountered
> when stretching the interpretation of a specification that is so
> fundamental as RFC 8200.
> 
>  
> 
>       
>                                                                                                Thanks,
> 
>                                     
>                                                                      Ron
> 
>  
> 
>  
> 
>  
> 
>  
> 
>  
> 
>  
> 
> *From:* spring <spring-bounces@ietf.org> *On Behalf Of *Rob Shakir
> *Sent:* Sunday, August 4, 2019 5:04 PM
> *To:* SPRING WG List <spring@ietf.org>
> *Subject:* [spring] Beyond SRv6.
> 
>  
> 
> Hi SPRING WG,
> 
>  
> 
> Over the last 5+ years, the IETF has developed Source Packet Routing in
> NetworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) and
> IPv6 (SRv6) data planes. SR-MPLS may also be transported over IP in UDP
> or GRE.
> 
>  
> 
> These encapsulations are past WG last call (in IESG or RFC Editor).
> 
>  
> 
> During the SPRING WG meeting at IETF 105, two presentations were related
> to the reduction of the size of the SID for IPv6 dataplane:
> 
>   * SRv6+ / CRH --
>     https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-04
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dbonica-2Dspring-2Dsrv6-2Dplus-2D04&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=ackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=KUhAfjVsx_wK645uJk0FHzs2vxiAVr-CskMPAaEhEQQ&e=>
>   * uSID --
>     https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extension-srv6-usid-01
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dfilsfils-2Dspring-2Dnet-2Dpgm-2Dextension-2Dsrv6-2Dusid-2D01&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=ackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=Aq1DK7fu73axZ1PXLIE8xnHE2AhTtNZy9LTHgWqx4CQ&e=> 
> 
>  
> 
> During the IETF week, two additional drafts have been proposed:
> 
>   * https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dli-2Dspring-2Dcompressed-2Dsrv6-2Dnp-2D00&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=ackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=XWUDAD2FMhWLfeT5sgUb1lgthJhugcyT98GJ2N-CrKs&e=> 
>   * https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dmirsky-2D6man-2Dunified-2Did-2Dsr-2D03&d=DwMFaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=Fch9FQ82sir-BoLx84hKuKwl-AWF2EfpHcAwrDThKP8&m=ackZC9evRf_LWYu2a-1NaGRDJKdxnE2ieIC4dD_FL6s&s=gcbkHYxXm7FU7vblOB1vI58SDaaWf62pa7YvLmsP4nI&e=> 
> 
>  
> 
> As we expressed during the meeting, it is important for the WG to
> understand what the aims of additional encapsulations are. Thus, we
> think it is important that the WG should first get to a common
> understanding on the requirements for a new IPv6 data plane with a
> smaller SID - both from the perspective of operators that are looking to
> deploy these technologies, and from that of the software/hardware
> implementation.
> 
>  
> 
> Therefore, we would like to solicit network operators interested in SR
> over the IPv6 data plane to briefly introduce their:
> 
>   * use case (e.g. Fast Reroute, explicit routing/TE)
>   * forwarding performance and scaling requirements
> 
>       o e.g., (number of nodes, network diameter, number of SID required
>         in max and average). For the latter, if possible using both SRv6
>         128-bit SIDs and shorter (e.g. 32-bit) SIDs as the number would
>         typically be different (*).
> 
>   * if the existing SRv6 approach is not deployable in their
>     circumstances, details of the requirement of a different solution is
>     required and whether this solution is needed for the short term only
>     or for the long term.
> 
>  
> 
> As well as deployment limitations, we would like the SPRING community to
> briefly describe the platform limitations that they are seeing which
> limit the deployment of SRv6  In particular limitations related to the
> number of SIDs which can be pushed and forwarded and how much the use of
> shorter SIDs would improve the deployments .
> 
>  
> 
> For both of these sets of feedback if possible, please post this to the
> SPRING WG. If the information cannot be shared publicly, please send it
> directly to the chairs & AD (Martin).
> 
>  
> 
> This call for information will run for four weeks, up to 2019/09/03. As
> a reminder, you can reach the SPRING chairs via spring-chairs@ietf.org
> <mailto:spring-chairs@ietf.org>and ADs via spring-ads@ietf.org
> <mailto:spring-ads@ietf.org>. 
> 
>  
> 
> Thank you,
> 
> -- Rob & Bruno
> 
>  
> 
> (*) As expressed on the mailing list, a 128 bit SID can encode two
> instructions a node SID and an adjacency SID hence less SID may be required.
> 
>  
> 
>  
> 
> Juniper Business Use Only
> 
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
> 


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492





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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sun, 1 Sep 2019 10:32:01 +1000
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+1

The value in using a commodity protocol like RFC 8200 compliant IPv6
for something like SR is that you're gaining from IPv6 being well
understood, widely implemented, widely deployed, widely interoperable,
widely tested, and the major bugs have very likely already been
discovered. It's cheaper to use something that it is already widely in
use.

However, if you then try to stretch or go beyond expected use and
semantics, and violate protocol definitions, you're decommodifying the
commodity. You've lost significant or all of the value of using the
commodity protocol in the first place.





On Sun, 1 Sep 2019 at 06:34, Ron Bonica
<rbonica=3D40juniper.net@dmarc.ietf.org> wrote:
>
> Rob,
>
>
>
> The following are arguments for proceeding with SRv6+:
>
>
>
> Efficient forwarding with deep SID lists
> Operational Simplicity
> SRv6+ work may finish before SRv6
>
>
>
> Efficient forwarding with deep SID Lists
>
> ----------------------------------------------------
>
>
>
> SR customers have stated a firm requirement to support SR paths that cont=
ain 8 to 12 segments. They have also stated a requirement for implementatio=
ns to forward at line speed  and without consuming excessive overhead bandw=
idth.
>
>
>
> SRv6, as defined in draft-ietf-6man-segment-routing-header, cannot satisf=
y these requirements. In order to support an SR path with 8 segments, SRv6 =
would require a 128-byte SRH. Even if ASICs could process such a long SRH a=
t line speed, the bandwidth overhead would be prohibitive.
>
>
>
> Therefore, one of the four solutions  that you mention below is required =
to make SRv6 deployable. While draft-ietf-6man-segment-routing-header is cl=
ose to maturity, the four competing solutions mentioned below are equally m=
ature and should be given equal consideration.
>
>
>
> The four solutions are SRv6+, uSID, draft-li and draft-mirsky.
>
>
>
> Operational Simplicity
>
> -----------------------------
>
> Network operators strive for operational simplicity. By loosely interpret=
ing (and sometimes bending) the requirements of RFCs 4291 and RFC 8200, SRv=
6 introduces architectural quirks that introduce operational complexity. Th=
e following are architectural quirks of  draft-ietf-6man-segment-routing-he=
ader:
>
>
>
> The Segment Routing Header (SRH) serves purposes other than routing. Ther=
efore, the SRH is sometimes required for packets that traverse the least-co=
st path from source to destination
> The SRH and the IPv6 Authentication Header are incompatible.
> The IPv6 destination address determines whether an SRH is valid and how i=
t is processed. For example, if the IPv6 destination address contains one l=
ocally instantiated value, the SRH might be processed in one particular way=
, while if the IPv6 destination address contains another locally instantiat=
ed value, the SRH might be totally invalid.
>
>
>
> Draft-ietf-spring-srv6-network-programming  promises more architectural q=
uirks. For example:
>
>
>
> Segment endpoints can insert and/or delete IPv6 extension headers
> An IPv6 packet can contain two Segment Routing headers
> IPv6 packets are no longer self-describing. For example, the Next Header =
Field in the SRH can carry a value of No Next Header, even though the SRH i=
s followed by Ethernet payload.
>
>
>
> Other emerging drafts promise still more architectural quirks. For exampl=
e, in draft-ali-6man-spring-srv6-oam, implementations need to examine the S=
RH even when Segment Left equals zero. This is because the SRH has been ove=
rloaded to carry OAM as well as routing information.
>
>
>
> Furthermore, draft-filsfils-spring-net-pgm-extension-srv6-usid requires n=
etwork operators to obtain address space and number their networks in a par=
ticular way to make routing work.
>
>
>
> SRv6+ Work May Finish Before SRv6 work
>
> --------------------------------------------------------
>
> SRv6+  has been implemented on LINUX and is being implemented on JUNOS. I=
mplementation experience demonstrates that specification is fairly complete=
. For example, there is no need for an SRv6+ OAM document. It=E2=80=99s jus=
t IPv6 and IPv6 OAM just works.
>
>
>
> Furthermore, the SRv6+ specifications adhere to a strict interpretation o=
f RFC 8200. Therefore, as they progress through the working group, they won=
=E2=80=99t need to overcome the objections that are inevitably encountered =
when stretching the interpretation of a specification that is so fundamenta=
l as RFC 8200.
>
>
>
>                                                                          =
                             Thanks,
>
>                                                                          =
                                 Ron
>
>
>
>
>
>
>
>
>
>
>
>
>
> From: spring <spring-bounces@ietf.org> On Behalf Of Rob Shakir
> Sent: Sunday, August 4, 2019 5:04 PM
> To: SPRING WG List <spring@ietf.org>
> Subject: [spring] Beyond SRv6.
>
>
>
> Hi SPRING WG,
>
>
>
> Over the last 5+ years, the IETF has developed Source Packet Routing in N=
etworkinG (SPRING) aka Segment Routing for both the MPLS (SR-MPLS) and IPv6=
 (SRv6) data planes. SR-MPLS may also be transported over IP in UDP or GRE.
>
>
>
> These encapsulations are past WG last call (in IESG or RFC Editor).
>
>
>
> During the SPRING WG meeting at IETF 105, two presentations were related =
to the reduction of the size of the SID for IPv6 dataplane:
>
> SRv6+ / CRH -- https://tools.ietf.org/html/draft-bonica-spring-srv6-plus-=
04
> uSID -- https://tools.ietf.org/html/draft-filsfils-spring-net-pgm-extensi=
on-srv6-usid-01
>
>
>
> During the IETF week, two additional drafts have been proposed:
>
> https://tools.ietf.org/html/draft-li-spring-compressed-srv6-np-00
> https://tools.ietf.org/html/draft-mirsky-6man-unified-id-sr-03
>
>
>
> As we expressed during the meeting, it is important for the WG to underst=
and what the aims of additional encapsulations are. Thus, we think it is im=
portant that the WG should first get to a common understanding on the requi=
rements for a new IPv6 data plane with a smaller SID - both from the perspe=
ctive of operators that are looking to deploy these technologies, and from =
that of the software/hardware implementation.
>
>
>
> Therefore, we would like to solicit network operators interested in SR ov=
er the IPv6 data plane to briefly introduce their:
>
> use case (e.g. Fast Reroute, explicit routing/TE)
> forwarding performance and scaling requirements
>
> e.g., (number of nodes, network diameter, number of SID required in max a=
nd average). For the latter, if possible using both SRv6 128-bit SIDs and s=
horter (e.g. 32-bit) SIDs as the number would typically be different (*).
>
> if the existing SRv6 approach is not deployable in their circumstances, d=
etails of the requirement of a different solution is required and whether t=
his solution is needed for the short term only or for the long term.
>
>
>
> As well as deployment limitations, we would like the SPRING community to =
briefly describe the platform limitations that they are seeing which limit =
the deployment of SRv6  In particular limitations related to the number of =
SIDs which can be pushed and forwarded and how much the use of shorter SIDs=
 would improve the deployments .
>
>
>
> For both of these sets of feedback if possible, please post this to the S=
PRING WG. If the information cannot be shared publicly, please send it dire=
ctly to the chairs & AD (Martin).
>
>
>
> This call for information will run for four weeks, up to 2019/09/03. As a=
 reminder, you can reach the SPRING chairs via spring-chairs@ietf.org and A=
Ds via spring-ads@ietf.org.
>
>
>
> Thank you,
>
> -- Rob & Bruno
>
>
>
> (*) As expressed on the mailing list, a 128 bit SID can encode two instru=
ctions a node SID and an adjacency SID hence less SID may be required.
>
>
>
>
>
> Juniper Business Use Only
>
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------


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Subject: Re: [spring] Beyond SRv6.
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On 1/9/19 03:32, Mark Smith wrote:
> +1
> 
> The value in using a commodity protocol like RFC 8200 compliant IPv6
> for something like SR is that you're gaining from IPv6 being well
> understood, widely implemented, widely deployed, widely interoperable,
> widely tested, and the major bugs have very likely already been
> discovered. It's cheaper to use something that it is already widely in
> use.
> 
> However, if you then try to stretch or go beyond expected use and
> semantics, and violate protocol definitions, you're decommodifying the
> commodity. You've lost significant or all of the value of using the
> commodity protocol in the first place.

I think it's simpler than that: it would be quite "interesting" to have
one wg specify protocol A, and another wg that specifies protocol B that
uses protocol A while violating the very spec of protocol A.


-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492





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From: Mark Smith <markzzzsmith@gmail.com>
Date: Sun, 1 Sep 2019 12:02:22 +1000
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To: Fernando Gont <fgont@si6networks.com>
Cc: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, SPRING WG <spring@ietf.org>,  "6man@ietf.org" <6man@ietf.org>, Rob Shakir <robjs=40google.com@dmarc.ietf.org>
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--0000000000009d49e50591743fc0
Content-Type: text/plain; charset="UTF-8"

On Sun., 1 Sep. 2019, 10:53 Fernando Gont, <fgont@si6networks.com> wrote:

> On 1/9/19 03:32, Mark Smith wrote:
> > +1
> >
> > The value in using a commodity protocol like RFC 8200 compliant IPv6
> > for something like SR is that you're gaining from IPv6 being well
> > understood, widely implemented, widely deployed, widely interoperable,
> > widely tested, and the major bugs have very likely already been
> > discovered. It's cheaper to use something that it is already widely in
> > use.
> >
> > However, if you then try to stretch or go beyond expected use and
> > semantics, and violate protocol definitions, you're decommodifying the
> > commodity. You've lost significant or all of the value of using the
> > commodity protocol in the first place.
>
> I think it's simpler than that: it would be quite "interesting" to have
> one wg specify protocol A, and another wg that specifies protocol B that
> uses protocol A while violating the very spec of protocol A.
>


Well what I've described is the fundamental reason why that shouldn't
happen and why everybody should agree that it shouldn't happen.

At the point where an apparent limitation or constraint in one WG's
protocol is discovered by another WG, the latter WG should then consult
with the first WG on how to solve the problem that would be consistent with
the first WG's protocol and architecture.

If the behaviour doesn't comply with RFC 8200, it isn't IPv6 anymore.
Instead it is a proprietary and unofficial variant of it.

There's an RFC about this sort of thing. It also applies to different IETF
WGs.

Uncoordinated Protocol Development Considered Harmful

https://tools.ietf.org/html/rfc5704



Regards,
Mark.


>
> --
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
>
>
>
>
>

--0000000000009d49e50591743fc0
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto"><div><br><br><div class=3D"gmail_quote"><div dir=3D"ltr" =
class=3D"gmail_attr">On Sun., 1 Sep. 2019, 10:53 Fernando Gont, &lt;<a href=
=3D"mailto:fgont@si6networks.com" rel=3D"noreferrer noreferrer noreferrer n=
oreferrer noreferrer noreferrer" target=3D"_blank">fgont@si6networks.com</a=
>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 1/9/19 03:32, Mark =
Smith wrote:<br>
&gt; +1<br>
&gt; <br>
&gt; The value in using a commodity protocol like RFC 8200 compliant IPv6<b=
r>
&gt; for something like SR is that you&#39;re gaining from IPv6 being well<=
br>
&gt; understood, widely implemented, widely deployed, widely interoperable,=
<br>
&gt; widely tested, and the major bugs have very likely already been<br>
&gt; discovered. It&#39;s cheaper to use something that it is already widel=
y in<br>
&gt; use.<br>
&gt; <br>
&gt; However, if you then try to stretch or go beyond expected use and<br>
&gt; semantics, and violate protocol definitions, you&#39;re decommodifying=
 the<br>
&gt; commodity. You&#39;ve lost significant or all of the value of using th=
e<br>
&gt; commodity protocol in the first place.<br>
<br>
I think it&#39;s simpler than that: it would be quite &quot;interesting&quo=
t; to have<br>
one wg specify protocol A, and another wg that specifies protocol B that<br=
>
uses protocol A while violating the very spec of protocol A.<br></blockquot=
e></div></div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div =
dir=3D"auto">Well what I&#39;ve described is the fundamental reason why tha=
t shouldn&#39;t happen and why everybody should agree that it shouldn&#39;t=
 happen.</div><div dir=3D"auto"><br></div><div dir=3D"auto">At the point wh=
ere an apparent limitation or constraint in one WG&#39;s protocol is discov=
ered by another WG, the latter WG should then consult with the first WG on =
how to solve the problem that would be consistent with the first WG&#39;s p=
rotocol and architecture.</div><div dir=3D"auto"><br></div><div dir=3D"auto=
">If the behaviour doesn&#39;t comply with RFC 8200, it isn&#39;t IPv6 anym=
ore. Instead it is a proprietary and unofficial variant of it.</div><div di=
r=3D"auto"><br></div><div dir=3D"auto">There&#39;s an RFC about this sort o=
f thing. It also applies to different IETF WGs.</div><div dir=3D"auto"><br>=
</div><div dir=3D"auto"><pre style=3D"white-space:pre-wrap">Uncoordinated P=
rotocol Development Considered Harmful</pre><pre><span style=3D"white-space=
:pre-wrap"><a href=3D"https://tools.ietf.org/html/rfc5704" rel=3D"noreferre=
r noreferrer noreferrer" target=3D"_blank">https://tools.ietf.org/html/rfc5=
704</a><br></span></pre></div><div dir=3D"auto"><br></div><div dir=3D"auto"=
><br></div><div dir=3D"auto">Regards,</div><div dir=3D"auto">Mark.</div><di=
v dir=3D"auto"><br></div><div dir=3D"auto"><div class=3D"gmail_quote"><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">
<br>
<br>
-- <br>
Fernando Gont<br>
SI6 Networks<br>
e-mail: <a href=3D"mailto:fgont@si6networks.com" rel=3D"noreferrer noreferr=
er noreferrer noreferrer noreferrer noreferrer noreferrer" target=3D"_blank=
">fgont@si6networks.com</a><br>
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492<br>
<br>
<br>
<br>
<br>
</blockquote></div></div></div>

--0000000000009d49e50591743fc0--

