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From: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To: "sip-overload@ietf.org" <sip-overload@ietf.org>
Date: Mon, 5 Nov 2012 14:47:17 +0100
Thread-Topic: Overload and emergency
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Subject: [sip-overload] Overload and emergency
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For emergency, draft-ietf-soc-overload-control-10

   A SIP client SHOULD honor the local policy for prioritizing SIP
   requests such as policies based on the content of the Resource-
   Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
   RPH contents may indicate high priority requests that should be
   preserved as much as possible during overload.  The RPH contents can
   also indicate a low-priority request that is eligible to be dropped
   during times of overload.  Other indicators, such as the SOS URN
   [RFC5031] indicating an emergency request, may also be used for
   prioritization.

 And for draft-ietf-soc-load-control-event-package-05

   In addition, whatever the actual policy is, SIP
   servers SHOULD honor the local policy for prioritizing SIP requests
   such as policies based on the contents of the Resource-Priority
   Header (RPH) [RFC4412].  The RPH contents may indicate high priority
   requests that should be preserved as much as possible, or low
   priority requests that could be dropped during overload.  Other
   indicators, such as the SOS Uniform Resource Name (URN) [RFC5031]
   indicating an emergency request, may also be used for prioritization.
   SIP request rejection and message prioritization at an overloaded
   server are also discussed in Section 5.10 of
   [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].

Prioritisation of emergency is under exactly the same sort constraints as p=
riority, therefore in both these drafts I would like to see exactly paralle=
l specification to priority.

   A SIP client SHOULD honor any local policy for prioritizing SIP
   requests such as policies based on the content of the Resource-
   Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
   RPH contents may indicate high priority requests that should be
   preserved as much as possible during overload.  The RPH contents can
   also indicate a low-priority request that is eligible to be dropped
   during times of overload. =20

   A SIP client SHOULD honor any local policy for prioritizing SIP=20
   requests relating to emergency calls, as identified by the SOS=20
   URN [RFC5031] indicating an emergency request.

While only some countries require priority for emergency, those that do wan=
t this adequately specified.

Note that in the load control document, this does need to be separate parag=
raphs.

Keith

From jgunn6@csc.com  Mon Nov  5 06:37:20 2012
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Subject: Re: [sip-overload] Overload and emergency
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Keith,

I agree we should have the same wording in 
draft-ietf-soc-overload-control
soc-load-control-event-package
also
draft-ietf-soc-overload-rate-control

But I do have one concern with your proposed new wording.

Both versions of the current wording give RPH and SOS as examples of 
"local policy" which may prioritize  which SIP messages don't get drops. 
However, they are only examples, and do not preclude other local policies. 
 

For instance I have understood "drop new INVITES before you drop messages 
associated with already established sessions" to be another example of 
"local policy".  But it isn't explicitly mentioned in that text.  Some of 
the documents mention it elsewhere.


Perhaps
"   A SIP client SHOULD honor any local policy for prioritizing SIP
   requests such as policies based on message type, e.g., INVITEs vs.
   requests associated with existing sessions.
 
   A SIP client SHOULD honor any local policy for prioritizing SIP 
   requests based on the content of the Resource-
   Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
   RPH contents may indicate high priority requests that should be
   preserved as much as possible during overload.  The RPH contents can
   also indicate a low-priority request that is eligible to be dropped
   during times of overload. 

   A SIP client SHOULD honor any local policy for prioritizing SIP 
   requests relating to emergency calls, as identified by the SOS 
   URN [RFC5031] indicating an emergency request."

That puts RPH and the SOS URN on the same level, and makes the  use of 
"INVITEs" vs, "existing sessions" an explicit example. 

Janet




From:   "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To:     "sip-overload@ietf.org" <sip-overload@ietf.org>
Date:   11/05/2012 08:47 AM
Subject:        [sip-overload] Overload and emergency
Sent by:        sip-overload-bounces@ietf.org



For emergency, draft-ietf-soc-overload-control-10

   A SIP client SHOULD honor the local policy for prioritizing SIP
   requests such as policies based on the content of the Resource-
   Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
   RPH contents may indicate high priority requests that should be
   preserved as much as possible during overload.  The RPH contents can
   also indicate a low-priority request that is eligible to be dropped
   during times of overload.  Other indicators, such as the SOS URN
   [RFC5031] indicating an emergency request, may also be used for
   prioritization.

 And for draft-ietf-soc-load-control-event-package-05

   In addition, whatever the actual policy is, SIP
   servers SHOULD honor the local policy for prioritizing SIP requests
   such as policies based on the contents of the Resource-Priority
   Header (RPH) [RFC4412].  The RPH contents may indicate high priority
   requests that should be preserved as much as possible, or low
   priority requests that could be dropped during overload.  Other
   indicators, such as the SOS Uniform Resource Name (URN) [RFC5031]
   indicating an emergency request, may also be used for prioritization.
   SIP request rejection and message prioritization at an overloaded
   server are also discussed in Section 5.10 of
   [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].

Prioritisation of emergency is under exactly the same sort constraints as 
priority, therefore in both these drafts I would like to see exactly 
parallel specification to priority.

   A SIP client SHOULD honor any local policy for prioritizing SIP
   requests such as policies based on the content of the Resource-
   Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
   RPH contents may indicate high priority requests that should be
   preserved as much as possible during overload.  The RPH contents can
   also indicate a low-priority request that is eligible to be dropped
   during times of overload. 

   A SIP client SHOULD honor any local policy for prioritizing SIP 
   requests relating to emergency calls, as identified by the SOS 
   URN [RFC5031] indicating an emergency request.

While only some countries require priority for emergency, those that do 
want this adequately specified.

Note that in the load control document, this does need to be separate 
paragraphs.

Keith
_______________________________________________
sip-overload mailing list
sip-overload@ietf.org
https://www.ietf.org/mailman/listinfo/sip-overload


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Content-Type: text/html; charset="US-ASCII"

<font size=2 face="sans-serif"><br>
<br>
Keith,</font>
<br>
<br><font size=2 face="sans-serif">I agree we should have the same wording
in </font>
<br><tt><font size=2>draft-ietf-soc-overload-control</font></tt>
<br><tt><font size=2>soc-load-control-event-package</font></tt>
<br><tt><font size=2>also</font></tt>
<br><tt><font size=2>draft-ietf-soc-overload-rate-control</font></tt>
<br>
<br><tt><font size=2>But I do have one concern with your proposed new wording.</font></tt>
<br>
<br><tt><font size=2>Both versions of the current wording give RPH and
SOS as examples of &quot;local policy&quot; which may prioritize &nbsp;which
SIP messages don't get drops. &nbsp;However, they are only examples, and
do not preclude other local policies. &nbsp;</font></tt>
<br>
<br><tt><font size=2>For instance I have understood &quot;drop new INVITES
before you drop messages associated with already established sessions&quot;
to be another example of &quot;local policy&quot;. &nbsp;But it isn't explicitly
mentioned in that text. &nbsp;Some of the documents mention it elsewhere.</font></tt>
<br>
<br>
<br><tt><font size=2>Perhaps</font></tt>
<br><tt><font size=2>&quot; &nbsp; A SIP client SHOULD honor any local
policy for prioritizing SIP<br>
 &nbsp; requests such as policies based <i>on message type, e.g., INVITEs
vs.</i></font></tt>
<br><tt><font size=2><i>&nbsp; &nbsp;requests associated with existing
sessions.</i></font></tt>
<br><tt><font size=2>&nbsp; &nbsp;</font></tt>
<br><tt><font size=2>&nbsp; &nbsp;<i>A SIP client SHOULD honor any local
policy for prioritizing SIP </i></font></tt>
<br><tt><font size=2><i>&nbsp; &nbsp;requests based</i> on the content
of the Resource-<br>
 &nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namespace.value)<br>
 &nbsp; RPH contents may indicate high priority requests that should be<br>
 &nbsp; preserved as much as possible during overload. &nbsp;The RPH contents
can<br>
 &nbsp; also indicate a low-priority request that is eligible to be dropped<br>
 &nbsp; during times of overload. &nbsp;<br>
<br>
 &nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP
<br>
 &nbsp; requests relating to emergency calls, as identified by the SOS
<br>
 &nbsp; URN [RFC5031] indicating an emergency request.&quot;</font></tt>
<br>
<br><tt><font size=2>That puts RPH and the SOS URN on the same level, and
makes the &nbsp;use of &quot;INVITEs&quot; vs, &quot;existing sessions&quot;
an explicit example. </font></tt>
<br>
<br><tt><font size=2>Janet</font></tt>
<br>
<br>
<br>
<br>
<br><font size=1 color=#5f5f5f face="sans-serif">From: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">&quot;DRAGE, Keith
(Keith)&quot; &lt;keith.drage@alcatel-lucent.com&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">To: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">&quot;sip-overload@ietf.org&quot;
&lt;sip-overload@ietf.org&gt;</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Date: &nbsp; &nbsp; &nbsp;
&nbsp;</font><font size=1 face="sans-serif">11/05/2012 08:47 AM</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">[sip-overload]
Overload and emergency</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Sent by: &nbsp; &nbsp;
&nbsp; &nbsp;</font><font size=1 face="sans-serif">sip-overload-bounces@ietf.org</font>
<br>
<hr noshade>
<br>
<br>
<br><tt><font size=2>For emergency, draft-ietf-soc-overload-control-10<br>
<br>
 &nbsp; A SIP client SHOULD honor the local policy for prioritizing SIP<br>
 &nbsp; requests such as policies based on the content of the Resource-<br>
 &nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namespace.value)<br>
 &nbsp; RPH contents may indicate high priority requests that should be<br>
 &nbsp; preserved as much as possible during overload. &nbsp;The RPH contents
can<br>
 &nbsp; also indicate a low-priority request that is eligible to be dropped<br>
 &nbsp; during times of overload. &nbsp;Other indicators, such as the SOS
URN<br>
 &nbsp; [RFC5031] indicating an emergency request, may also be used for<br>
 &nbsp; prioritization.<br>
<br>
 And for draft-ietf-soc-load-control-event-package-05<br>
<br>
 &nbsp; In addition, whatever the actual policy is, SIP<br>
 &nbsp; servers SHOULD honor the local policy for prioritizing SIP requests<br>
 &nbsp; such as policies based on the contents of the Resource-Priority<br>
 &nbsp; Header (RPH) [RFC4412]. &nbsp;The RPH contents may indicate high
priority<br>
 &nbsp; requests that should be preserved as much as possible, or low<br>
 &nbsp; priority requests that could be dropped during overload. &nbsp;Other<br>
 &nbsp; indicators, such as the SOS Uniform Resource Name (URN) [RFC5031]<br>
 &nbsp; indicating an emergency request, may also be used for prioritization.<br>
 &nbsp; SIP request rejection and message prioritization at an overloaded<br>
 &nbsp; server are also discussed in Section 5.10 of<br>
 &nbsp; [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].<br>
<br>
Prioritisation of emergency is under exactly the same sort constraints
as priority, therefore in both these drafts I would like to see exactly
parallel specification to priority.<br>
<br>
 &nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP<br>
 &nbsp; requests such as policies based on the content of the Resource-<br>
 &nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namespace.value)<br>
 &nbsp; RPH contents may indicate high priority requests that should be<br>
 &nbsp; preserved as much as possible during overload. &nbsp;The RPH contents
can<br>
 &nbsp; also indicate a low-priority request that is eligible to be dropped<br>
 &nbsp; during times of overload. &nbsp;<br>
<br>
 &nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP
<br>
 &nbsp; requests relating to emergency calls, as identified by the SOS
<br>
 &nbsp; URN [RFC5031] indicating an emergency request.<br>
<br>
While only some countries require priority for emergency, those that do
want this adequately specified.<br>
<br>
Note that in the load control document, this does need to be separate paragraphs.<br>
<br>
Keith<br>
_______________________________________________<br>
sip-overload mailing list<br>
sip-overload@ietf.org<br>
</font></tt><a href="https://www.ietf.org/mailman/listinfo/sip-overload"><tt><font size=2>https://www.ietf.org/mailman/listinfo/sip-overload</font></tt></a><tt><font size=2><br>
</font></tt>
<br>
--=_alternative 0050512285257AAD_=--

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From: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To: Janet P Gunn <jgunn6@csc.com>
Date: Mon, 5 Nov 2012 15:41:30 +0100
Thread-Topic: [sip-overload] Overload and emergency
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Subject: Re: [sip-overload] Overload and emergency
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That is fine by me

Keith

________________________________
From: Janet P Gunn [mailto:jgunn6@csc.com]
Sent: 05 November 2012 14:37
To: DRAGE, Keith (Keith)
Cc: sip-overload@ietf.org; sip-overload-bounces@ietf.org
Subject: Re: [sip-overload] Overload and emergency



Keith,

I agree we should have the same wording in
draft-ietf-soc-overload-control
soc-load-control-event-package
also
draft-ietf-soc-overload-rate-control

But I do have one concern with your proposed new wording.

Both versions of the current wording give RPH and SOS as examples of "local=
 policy" which may prioritize  which SIP messages don't get drops.  However=
, they are only examples, and do not preclude other local policies.

For instance I have understood "drop new INVITES before you drop messages a=
ssociated with already established sessions" to be another example of "loca=
l policy".  But it isn't explicitly mentioned in that text.  Some of the do=
cuments mention it elsewhere.


Perhaps
"   A SIP client SHOULD honor any local policy for prioritizing SIP
  requests such as policies based on message type, e.g., INVITEs vs.
   requests associated with existing sessions.

   A SIP client SHOULD honor any local policy for prioritizing SIP
   requests based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests relating to emergency calls, as identified by the SOS
  URN [RFC5031] indicating an emergency request."

That puts RPH and the SOS URN on the same level, and makes the  use of "INV=
ITEs" vs, "existing sessions" an explicit example.

Janet




From:        "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To:        "sip-overload@ietf.org" <sip-overload@ietf.org>
Date:        11/05/2012 08:47 AM
Subject:        [sip-overload] Overload and emergency
Sent by:        sip-overload-bounces@ietf.org
________________________________



For emergency, draft-ietf-soc-overload-control-10

  A SIP client SHOULD honor the local policy for prioritizing SIP
  requests such as policies based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.  Other indicators, such as the SOS URN
  [RFC5031] indicating an emergency request, may also be used for
  prioritization.

And for draft-ietf-soc-load-control-event-package-05

  In addition, whatever the actual policy is, SIP
  servers SHOULD honor the local policy for prioritizing SIP requests
  such as policies based on the contents of the Resource-Priority
  Header (RPH) [RFC4412].  The RPH contents may indicate high priority
  requests that should be preserved as much as possible, or low
  priority requests that could be dropped during overload.  Other
  indicators, such as the SOS Uniform Resource Name (URN) [RFC5031]
  indicating an emergency request, may also be used for prioritization.
  SIP request rejection and message prioritization at an overloaded
  server are also discussed in Section 5.10 of
  [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].

Prioritisation of emergency is under exactly the same sort constraints as p=
riority, therefore in both these drafts I would like to see exactly paralle=
l specification to priority.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests such as policies based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests relating to emergency calls, as identified by the SOS
  URN [RFC5031] indicating an emergency request.

While only some countries require priority for emergency, those that do wan=
t this adequately specified.

Note that in the load control document, this does need to be separate parag=
raphs.

Keith
_______________________________________________
sip-overload mailing list
sip-overload@ietf.org
https://www.ietf.org/mailman/listinfo/sip-overload

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span style=
=3D'font-size:
10.0pt;font-family:Arial;color:navy'>That is fine by me<o:p></o:p></span></=
font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span style=
=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span style=
=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Keith<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span style=
=3D'font-size:
10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<div style=3D'border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt'>

<div>

<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font siz=
e=3D3
face=3D"Times New Roman"><span lang=3DEN-US style=3D'font-size:12.0pt'>

<hr size=3D2 width=3D"100%" align=3Dcenter tabindex=3D-1>

</span></font></div>

<p class=3DMsoNormal><b><font size=3D2 face=3DTahoma><span lang=3DEN-US
style=3D'font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span>=
</font></b><font
size=3D2 face=3DTahoma><span lang=3DEN-US style=3D'font-size:10.0pt;font-fa=
mily:Tahoma'>
Janet P Gunn [mailto:jgunn6@csc.com] <br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> 05 November 2012 14:37=
<br>
<b><span style=3D'font-weight:bold'>To:</span></b> DRAGE, Keith (Keith)<br>
<b><span style=3D'font-weight:bold'>Cc:</span></b> sip-overload@ietf.org;
sip-overload-bounces@ietf.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> Re: [sip-overload]
Overload and emergency</span></font><span lang=3DEN-US><o:p></o:p></span></=
p>

</div>

<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span style=3D=
'font-size:
12.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3Dsans-serif><span style=3D'font-s=
ize:10.0pt;
font-family:sans-serif'><br>
<br>
Keith,</span></font> <br>
<br>
<font size=3D2 face=3Dsans-serif><span style=3D'font-size:10.0pt;font-famil=
y:sans-serif'>I
agree we should have the same wording in </span></font><br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>dr=
aft-ietf-soc-overload-control</span></font></tt>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>so=
c-load-control-event-package</span></font></tt>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>al=
so</span></font></tt>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>dr=
aft-ietf-soc-overload-rate-control</span></font></tt>
<br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Bu=
t I do
have one concern with your proposed new wording.</span></font></tt> <br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Bo=
th
versions of the current wording give RPH and <st1:stockticker w:st=3D"on">S=
OS</st1:stockticker>
as examples of &quot;local policy&quot; which may prioritize &nbsp;which SI=
P
messages don't get drops. &nbsp;However, they are only examples, and do not
preclude other local policies. &nbsp;</span></font></tt> <br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Fo=
r instance
I have understood &quot;drop new INVITES before you drop messages associate=
d
with already established sessions&quot; to be another example of &quot;loca=
l
policy&quot;. &nbsp;But it isn't explicitly mentioned in that text. &nbsp;S=
ome
of the documents mention it elsewhere.</span></font></tt> <br>
<br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Pe=
rhaps</span></font></tt>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>&q=
uot;
&nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP</spa=
n></font></tt><font
size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt;font-family:"=
Courier New"'><br>
<tt><font face=3D"Courier New">&nbsp; requests such as policies based <i><s=
pan
style=3D'font-style:italic'>on message type, e.g., INVITEs vs.</span></i></=
font></tt></span></font>
<br>
<tt><i><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt;
font-style:italic'>&nbsp; &nbsp;requests associated with existing sessions.=
</span></font></i></tt>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>&n=
bsp;
&nbsp;</span></font></tt> <br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>&n=
bsp;
&nbsp;<i><span style=3D'font-style:italic'>A SIP client SHOULD honor any lo=
cal
policy for prioritizing SIP </span></i></span></font></tt><br>
<tt><i><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt;
font-style:italic'>&nbsp; &nbsp;requests based</span></font></i></tt><tt><f=
ont
size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'> on the cont=
ent of the
Resource-</span></font></tt><font size=3D2 face=3D"Courier New"><span
style=3D'font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face=3D"Courier New">&nbsp; Priority header (RPH, RFC4412 [RFC441=
2]).
&nbsp;Specific (namespace.value)</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; RPH contents may indicate high priori=
ty
requests that should be</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; preserved as much as possible during
overload. &nbsp;The RPH contents can</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; also indicate a low-priority request =
that
is eligible to be dropped</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; during times of overload. &nbsp;</fon=
t></tt><br>
<br>
<tt><font face=3D"Courier New">&nbsp; A SIP client SHOULD honor any local p=
olicy
for prioritizing SIP </font></tt><br>
<tt><font face=3D"Courier New">&nbsp; requests relating to emergency calls,=
 as
identified by the <st1:stockticker w:st=3D"on">SOS</st1:stockticker> </font=
></tt><br>
<tt><font face=3D"Courier New">&nbsp; URN [RFC5031] indicating an emergency
request.&quot;</font></tt></span></font> <br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Th=
at puts
RPH and the <st1:stockticker w:st=3D"on">SOS</st1:stockticker> URN on the s=
ame
level, and makes the &nbsp;use of &quot;INVITEs&quot; vs, &quot;existing
sessions&quot; an explicit example. </span></font></tt><br>
<br>
<tt><font size=3D2 face=3D"Courier New"><span style=3D'font-size:10.0pt'>Ja=
net</span></font></tt>
<br>
<br>
<br>
<br>
<br>
<font size=3D1 color=3D"#5f5f5f" face=3Dsans-serif><span style=3D'font-size=
:7.5pt;
font-family:sans-serif;color:#5F5F5F'>From: &nbsp; &nbsp; &nbsp; &nbsp;</sp=
an></font><font
size=3D1 face=3Dsans-serif><span style=3D'font-size:7.5pt;font-family:sans-=
serif'>&quot;DRAGE,
Keith (Keith)&quot; &lt;keith.drage@alcatel-lucent.com&gt;</span></font> <b=
r>
<font size=3D1 color=3D"#5f5f5f" face=3Dsans-serif><span style=3D'font-size=
:7.5pt;
font-family:sans-serif;color:#5F5F5F'>To: &nbsp; &nbsp; &nbsp; &nbsp;</span=
></font><font
size=3D1 face=3Dsans-serif><span style=3D'font-size:7.5pt;font-family:sans-=
serif'>&quot;sip-overload@ietf.org&quot;
&lt;sip-overload@ietf.org&gt;</span></font> <br>
<font size=3D1 color=3D"#5f5f5f" face=3Dsans-serif><span style=3D'font-size=
:7.5pt;
font-family:sans-serif;color:#5F5F5F'>Date: &nbsp; &nbsp; &nbsp; &nbsp;</sp=
an></font><font
size=3D1 face=3Dsans-serif><span style=3D'font-size:7.5pt;font-family:sans-=
serif'>11/05/2012
08:47 AM</span></font> <br>
<font size=3D1 color=3D"#5f5f5f" face=3Dsans-serif><span style=3D'font-size=
:7.5pt;
font-family:sans-serif;color:#5F5F5F'>Subject: &nbsp; &nbsp; &nbsp; &nbsp;<=
/span></font><font
size=3D1 face=3Dsans-serif><span style=3D'font-size:7.5pt;font-family:sans-=
serif'>[sip-overload]
Overload and emergency</span></font> <br>
<font size=3D1 color=3D"#5f5f5f" face=3Dsans-serif><span style=3D'font-size=
:7.5pt;
font-family:sans-serif;color:#5F5F5F'>Sent by: &nbsp; &nbsp; &nbsp; &nbsp;<=
/span></font><font
size=3D1 face=3Dsans-serif><span style=3D'font-size:7.5pt;font-family:sans-=
serif'>sip-overload-bounces@ietf.org</span></font>
<o:p></o:p></p>

<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><font siz=
e=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'>

<hr size=3D2 width=3D"100%" noshade color=3Dgray align=3Dcenter>

</span></font></div>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><font size=3D3
face=3D"Times New Roman"><span style=3D'font-size:12.0pt'><br>
<br>
<br>
</span></font><tt><font size=3D2 face=3D"Courier New"><span style=3D'font-s=
ize:10.0pt'>For
emergency, draft-ietf-soc-overload-control-10</span></font></tt><font size=
=3D2
face=3D"Courier New"><span style=3D'font-size:10.0pt;font-family:"Courier N=
ew"'><br>
<br>
<tt><font face=3D"Courier New">&nbsp; A SIP client SHOULD honor the local p=
olicy
for prioritizing SIP</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; requests such as policies based on th=
e
content of the Resource-</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; Priority header (RPH, RFC4412 [RFC441=
2]).
&nbsp;Specific (namespace.value)</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; RPH contents may indicate high priori=
ty
requests that should be</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; preserved as much as possible during
overload. &nbsp;The RPH contents can</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; also indicate a low-priority request =
that
is eligible to be dropped</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; during times of overload. &nbsp;Other
indicators, such as the <st1:stockticker w:st=3D"on">SOS</st1:stockticker> =
URN</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; [RFC5031] indicating an emergency req=
uest,
may also be used for</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; prioritization.</font></tt><br>
<br>
<tt><font face=3D"Courier New">And for
draft-ietf-soc-load-control-event-package-05</font></tt><br>
<br>
<tt><font face=3D"Courier New">&nbsp; In addition, whatever the actual poli=
cy is,
SIP</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; servers SHOULD honor the local policy=
 for
prioritizing SIP requests</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; such as policies based on the content=
s of
the Resource-Priority</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; Header (RPH) [RFC4412]. &nbsp;The RPH
contents may indicate high priority</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; requests that should be preserved as =
much
as possible, or low</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; priority requests that could be dropp=
ed
during overload. &nbsp;Other</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; indicators, such as the <st1:stocktic=
ker
w:st=3D"on">SOS</st1:stockticker> Uniform Resource Name (URN) [RFC5031]</fo=
nt></tt><br>
<tt><font face=3D"Courier New">&nbsp; indicating an emergency request, may =
also
be used for prioritization.</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; SIP request rejection and message
prioritization at an overloaded</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; server are also discussed in Section =
5.10
of</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; [I-D.ietf-soc-overload-control] and S=
ection
12 of [RFC6357].</font></tt><br>
<br>
<tt><font face=3D"Courier New">Prioritisation of emergency is under exactly=
 the
same sort constraints as priority, therefore in both these drafts I would l=
ike
to see exactly parallel specification to priority.</font></tt><br>
<br>
<tt><font face=3D"Courier New">&nbsp; A SIP client SHOULD honor any local p=
olicy
for prioritizing SIP</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; requests such as policies based on th=
e
content of the Resource-</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; Priority header (RPH, RFC4412 [RFC441=
2]).
&nbsp;Specific (namespace.value)</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; RPH contents may indicate high priori=
ty
requests that should be</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; preserved as much as possible during
overload. &nbsp;The RPH contents can</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; also indicate a low-priority request =
that
is eligible to be dropped</font></tt><br>
<tt><font face=3D"Courier New">&nbsp; during times of overload. &nbsp;</fon=
t></tt><br>
<br>
<tt><font face=3D"Courier New">&nbsp; A SIP client SHOULD honor any local p=
olicy
for prioritizing SIP </font></tt><br>
<tt><font face=3D"Courier New">&nbsp; requests relating to emergency calls,=
 as
identified by the <st1:stockticker w:st=3D"on">SOS</st1:stockticker> </font=
></tt><br>
<tt><font face=3D"Courier New">&nbsp; URN [RFC5031] indicating an emergency
request.</font></tt><br>
<br>
<tt><font face=3D"Courier New">While only some countries require priority f=
or
emergency, those that do want this adequately specified.</font></tt><br>
<br>
<tt><font face=3D"Courier New">Note that in the load control document, this=
 does
need to be separate paragraphs.</font></tt><br>
<br>
<tt><font face=3D"Courier New">Keith</font></tt><br>
<tt><font face=3D"Courier New">____________________________________________=
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From: <bruno.chatras@orange.com>
To: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>, Janet P Gunn <jgunn6@csc.com>
Thread-Topic: [sip-overload] Overload and emergency
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Cc: "sip-overload@ietf.org" <sip-overload@ietf.org>
Subject: Re: [sip-overload] Overload and emergency
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BTW, why do we have a SHOULD rather than a MUST? Setting a local policy is =
optional but if there is one it seems to me that the SIP client MUST honor =
it.
BC

De : sip-overload-bounces@ietf.org [mailto:sip-overload-bounces@ietf.org] D=
e la part de DRAGE, Keith (Keith)
Envoy=E9 : lundi 5 novembre 2012 15:42
=C0 : Janet P Gunn
Cc : sip-overload@ietf.org
Objet : Re: [sip-overload] Overload and emergency

That is fine by me

Keith

________________________________
From: Janet P Gunn [mailto:jgunn6@csc.com]
Sent: 05 November 2012 14:37
To: DRAGE, Keith (Keith)
Cc: sip-overload@ietf.org; sip-overload-bounces@ietf.org
Subject: Re: [sip-overload] Overload and emergency



Keith,

I agree we should have the same wording in
draft-ietf-soc-overload-control
soc-load-control-event-package
also
draft-ietf-soc-overload-rate-control

But I do have one concern with your proposed new wording.

Both versions of the current wording give RPH and SOS as examples of "local=
 policy" which may prioritize  which SIP messages don't get drops.  However=
, they are only examples, and do not preclude other local policies.

For instance I have understood "drop new INVITES before you drop messages a=
ssociated with already established sessions" to be another example of "loca=
l policy".  But it isn't explicitly mentioned in that text.  Some of the do=
cuments mention it elsewhere.


Perhaps
"   A SIP client SHOULD honor any local policy for prioritizing SIP
  requests such as policies based on message type, e.g., INVITEs vs.
   requests associated with existing sessions.

   A SIP client SHOULD honor any local policy for prioritizing SIP
   requests based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests relating to emergency calls, as identified by the SOS
  URN [RFC5031] indicating an emergency request."

That puts RPH and the SOS URN on the same level, and makes the  use of "INV=
ITEs" vs, "existing sessions" an explicit example.

Janet




From:        "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To:        "sip-overload@ietf.org" <sip-overload@ietf.org>
Date:        11/05/2012 08:47 AM
Subject:        [sip-overload] Overload and emergency
Sent by:        sip-overload-bounces@ietf.org
________________________________



For emergency, draft-ietf-soc-overload-control-10

  A SIP client SHOULD honor the local policy for prioritizing SIP
  requests such as policies based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.  Other indicators, such as the SOS URN
  [RFC5031] indicating an emergency request, may also be used for
  prioritization.

And for draft-ietf-soc-load-control-event-package-05

  In addition, whatever the actual policy is, SIP
  servers SHOULD honor the local policy for prioritizing SIP requests
  such as policies based on the contents of the Resource-Priority
  Header (RPH) [RFC4412].  The RPH contents may indicate high priority
  requests that should be preserved as much as possible, or low
  priority requests that could be dropped during overload.  Other
  indicators, such as the SOS Uniform Resource Name (URN) [RFC5031]
  indicating an emergency request, may also be used for prioritization.
  SIP request rejection and message prioritization at an overloaded
  server are also discussed in Section 5.10 of
  [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].

Prioritisation of emergency is under exactly the same sort constraints as p=
riority, therefore in both these drafts I would like to see exactly paralle=
l specification to priority.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests such as policies based on the content of the Resource-
  Priority header (RPH, RFC4412 [RFC4412]).  Specific (namespace.value)
  RPH contents may indicate high priority requests that should be
  preserved as much as possible during overload.  The RPH contents can
  also indicate a low-priority request that is eligible to be dropped
  during times of overload.

  A SIP client SHOULD honor any local policy for prioritizing SIP
  requests relating to emergency calls, as identified by the SOS
  URN [RFC5031] indicating an emergency request.

While only some countries require priority for emergency, those that do wan=
t this adequately specified.

Note that in the load control document, this does need to be separate parag=
raphs.

Keith
_______________________________________________
sip-overload mailing list
sip-overload@ietf.org
https://www.ietf.org/mailman/listinfo/sip-overload

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<div class=3D"Section1">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;
color:#1F497D">BTW, why do we have a SHOULD rather than a MUST? Setting a l=
ocal policy is optional but if there is one it seems to me that the SIP cli=
ent MUST
 honor it.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;
color:#1F497D">BC<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,&quot;sans-serif&quot;;
color:#1F497D"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">De&nbsp;:</span></b><span style=3D"fo=
nt-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> sip-=
overload-bounces@ietf.org [mailto:sip-overload-bounces@ietf.org]
<b>De la part de</b> DRAGE, Keith (Keith)<br>
<b>Envoy=E9&nbsp;:</b> lundi 5 novembre 2012 15:42<br>
<b>=C0&nbsp;:</b> Janet P Gunn<br>
<b>Cc&nbsp;:</b> sip-overload@ietf.org<br>
<b>Objet&nbsp;:</b> Re: [sip-overload] Overload and emergency<o:p></o:p></s=
pan></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:navy">That is fine by me<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:navy"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:navy">Keith<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:navy"><o:p>&nbsp;</o:p></span></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm =
4.0pt">
<div>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
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<hr size=3D"2" width=3D"100%" align=3D"center">
</span></div>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:
&quot;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span lang=3D"EN=
-US" style=3D"font-size:10.0pt;
font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Janet P Gunn [mailt=
o:jgunn6@csc.com]
<br>
<b>Sent:</b> 05 November 2012 14:37<br>
<b>To:</b> DRAGE, Keith (Keith)<br>
<b>Cc:</b> sip-overload@ietf.org; sip-overload-bounces@ietf.org<br>
<b>Subject:</b> Re: [sip-overload] Overload and emergency</span><span lang=
=3D"EN-US"><o:p></o:p></span></p>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-GB"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-=
family:&quot;Arial&quot;,&quot;sans-serif&quot;"><br>
<br>
Keith,</span><span lang=3D"EN-GB"> <br>
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Ari=
al&quot;,&quot;sans-serif&quot;">I agree we should have the same wording in
</span><span lang=3D"EN-GB"><br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">draft-ietf-soc-o=
verload-control</span></tt><span lang=3D"EN-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">soc-load-control=
-event-package</span></tt><span lang=3D"EN-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">also</span></tt>=
<span lang=3D"EN-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">draft-ietf-soc-o=
verload-rate-control</span></tt><span lang=3D"EN-GB">
<br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">But I do have on=
e concern with your proposed new wording.</span></tt><span lang=3D"EN-GB">
<br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">Both versions of=
 the current wording give RPH and SOS as examples of &quot;local policy&quo=
t; which may prioritize &nbsp;which SIP messages don't get drops. &nbsp;How=
ever, they are only examples, and do not preclude other
 local policies. &nbsp;</span></tt><span lang=3D"EN-GB"> <br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">For instance I h=
ave understood &quot;drop new INVITES before you drop messages associated w=
ith already established sessions&quot; to be another example of &quot;local=
 policy&quot;. &nbsp;But it isn't explicitly mentioned in that
 text. &nbsp;Some of the documents mention it elsewhere.</span></tt><span l=
ang=3D"EN-GB">
<br>
<br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">Perhaps</span></=
tt><span lang=3D"EN-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">&quot; &nbsp; A =
SIP client SHOULD honor any local policy for prioritizing SIP</span></tt><s=
pan lang=3D"EN-GB" style=3D"font-size:10.0pt;font-family:&quot;Courier New&=
quot;"><br>
<tt>&nbsp; requests such as policies based <i>on message type, e.g., INVITE=
s vs.</i></tt></span><span lang=3D"EN-GB">
<br>
</span><tt><i><span lang=3D"EN-GB" style=3D"font-size:10.0pt">&nbsp; &nbsp;=
requests associated with existing sessions.</span></i></tt><span lang=3D"EN=
-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">&nbsp; &nbsp;</s=
pan></tt><span lang=3D"EN-GB">
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">&nbsp; &nbsp;<i>=
A SIP client SHOULD honor any local policy for prioritizing SIP
</i></span></tt><span lang=3D"EN-GB"><br>
</span><tt><i><span lang=3D"EN-GB" style=3D"font-size:10.0pt">&nbsp; &nbsp;=
requests based</span></i></tt><tt><span lang=3D"EN-GB" style=3D"font-size:1=
0.0pt"> on the content of the Resource-</span></tt><span lang=3D"EN-GB" sty=
le=3D"font-size:10.0pt;
font-family:&quot;Courier New&quot;"><br>
<tt>&nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namesp=
ace.value)</tt><br>
<tt>&nbsp; RPH contents may indicate high priority requests that should be<=
/tt><br>
<tt>&nbsp; preserved as much as possible during overload. &nbsp;The RPH con=
tents can</tt><br>
<tt>&nbsp; also indicate a low-priority request that is eligible to be drop=
ped</tt><br>
<tt>&nbsp; during times of overload. &nbsp;</tt><br>
<br>
<tt>&nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP =
</tt><br>
<tt>&nbsp; requests relating to emergency calls, as identified by the SOS <=
/tt><br>
<tt>&nbsp; URN [RFC5031] indicating an emergency request.&quot;</tt></span>=
<span lang=3D"EN-GB">
<br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">That puts RPH an=
d the SOS URN on the same level, and makes the &nbsp;use of &quot;INVITEs&q=
uot; vs, &quot;existing sessions&quot; an explicit example.
</span></tt><span lang=3D"EN-GB"><br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">Janet</span></tt=
><span lang=3D"EN-GB">
<br>
<br>
<br>
<br>
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;
color:#5F5F5F">From: &nbsp; &nbsp; &nbsp; &nbsp;</span><span lang=3D"EN-GB"=
 style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&qu=
ot;">&quot;DRAGE, Keith (Keith)&quot; &lt;keith.drage@alcatel-lucent.com&gt=
;</span><span lang=3D"EN-GB">
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;
color:#5F5F5F">To: &nbsp; &nbsp; &nbsp; &nbsp;</span><span lang=3D"EN-GB" s=
tyle=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;">&quot;sip-overload@ietf.org&quot; &lt;sip-overload@ietf.org&gt;</span><s=
pan lang=3D"EN-GB">
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;
color:#5F5F5F">Date: &nbsp; &nbsp; &nbsp; &nbsp;</span><span lang=3D"EN-GB"=
 style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif&qu=
ot;">11/05/2012 08:47 AM</span><span lang=3D"EN-GB">
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;
color:#5F5F5F">Subject: &nbsp; &nbsp; &nbsp; &nbsp;</span><span lang=3D"EN-=
GB" style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;">[sip-overload] Overload and emergency</span><span lang=3D"EN-GB">
<br>
</span><span lang=3D"EN-GB" style=3D"font-size:7.5pt;font-family:&quot;Aria=
l&quot;,&quot;sans-serif&quot;;
color:#5F5F5F">Sent by: &nbsp; &nbsp; &nbsp; &nbsp;</span><span lang=3D"EN-=
GB" style=3D"font-size:7.5pt;font-family:&quot;Arial&quot;,&quot;sans-serif=
&quot;">sip-overload-bounces@ietf.org</span><span lang=3D"EN-GB">
<o:p></o:p></span></p>
<div class=3D"MsoNormal" align=3D"center" style=3D"text-align:center"><span=
 lang=3D"EN-GB">
<hr size=3D"2" width=3D"100%" noshade=3D"" style=3D"color:gray" align=3D"ce=
nter">
</span></div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span lang=3D"EN-GB">=
<br>
<br>
<br>
</span><tt><span lang=3D"EN-GB" style=3D"font-size:10.0pt">For emergency, d=
raft-ietf-soc-overload-control-10</span></tt><span lang=3D"EN-GB" style=3D"=
font-size:10.0pt;font-family:&quot;Courier New&quot;"><br>
<br>
<tt>&nbsp; A SIP client SHOULD honor the local policy for prioritizing SIP<=
/tt><br>
<tt>&nbsp; requests such as policies based on the content of the Resource-<=
/tt><br>
<tt>&nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namesp=
ace.value)</tt><br>
<tt>&nbsp; RPH contents may indicate high priority requests that should be<=
/tt><br>
<tt>&nbsp; preserved as much as possible during overload. &nbsp;The RPH con=
tents can</tt><br>
<tt>&nbsp; also indicate a low-priority request that is eligible to be drop=
ped</tt><br>
<tt>&nbsp; during times of overload. &nbsp;Other indicators, such as the SO=
S URN</tt><br>
<tt>&nbsp; [RFC5031] indicating an emergency request, may also be used for<=
/tt><br>
<tt>&nbsp; prioritization.</tt><br>
<br>
<tt>And for draft-ietf-soc-load-control-event-package-05</tt><br>
<br>
<tt>&nbsp; In addition, whatever the actual policy is, SIP</tt><br>
<tt>&nbsp; servers SHOULD honor the local policy for prioritizing SIP reque=
sts</tt><br>
<tt>&nbsp; such as policies based on the contents of the Resource-Priority<=
/tt><br>
<tt>&nbsp; Header (RPH) [RFC4412]. &nbsp;The RPH contents may indicate high=
 priority</tt><br>
<tt>&nbsp; requests that should be preserved as much as possible, or low</t=
t><br>
<tt>&nbsp; priority requests that could be dropped during overload. &nbsp;O=
ther</tt><br>
<tt>&nbsp; indicators, such as the SOS Uniform Resource Name (URN) [RFC5031=
]</tt><br>
<tt>&nbsp; indicating an emergency request, may also be used for prioritiza=
tion.</tt><br>
<tt>&nbsp; SIP request rejection and message prioritization at an overloade=
d</tt><br>
<tt>&nbsp; server are also discussed in Section 5.10 of</tt><br>
<tt>&nbsp; [I-D.ietf-soc-overload-control] and Section 12 of [RFC6357].</tt=
><br>
<br>
<tt>Prioritisation of emergency is under exactly the same sort constraints =
as priority, therefore in both these drafts I would like to see exactly par=
allel specification to priority.</tt><br>
<br>
<tt>&nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP<=
/tt><br>
<tt>&nbsp; requests such as policies based on the content of the Resource-<=
/tt><br>
<tt>&nbsp; Priority header (RPH, RFC4412 [RFC4412]). &nbsp;Specific (namesp=
ace.value)</tt><br>
<tt>&nbsp; RPH contents may indicate high priority requests that should be<=
/tt><br>
<tt>&nbsp; preserved as much as possible during overload. &nbsp;The RPH con=
tents can</tt><br>
<tt>&nbsp; also indicate a low-priority request that is eligible to be drop=
ped</tt><br>
<tt>&nbsp; during times of overload. &nbsp;</tt><br>
<br>
<tt>&nbsp; A SIP client SHOULD honor any local policy for prioritizing SIP =
</tt><br>
<tt>&nbsp; requests relating to emergency calls, as identified by the SOS <=
/tt><br>
<tt>&nbsp; URN [RFC5031] indicating an emergency request.</tt><br>
<br>
<tt>While only some countries require priority for emergency, those that do=
 want this adequately specified.</tt><br>
<br>
<tt>Note that in the load control document, this does need to be separate p=
aragraphs.</tt><br>
<br>
<tt>Keith</tt><br>
<tt>_______________________________________________</tt><br>
<tt>sip-overload mailing list</tt><br>
<tt>sip-overload@ietf.org</tt><br>
</span><span lang=3D"EN-GB"><a href=3D"https://www.ietf.org/mailman/listinf=
o/sip-overload"><tt><span style=3D"font-size:10.0pt">https://www.ietf.org/m=
ailman/listinfo/sip-overload</span></tt></a><o:p></o:p></span></p>
</div>
</div>
</div>
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From internet-drafts@ietf.org  Wed Nov 21 11:04:18 2012
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Subject: [sip-overload] I-D Action: draft-ietf-soc-overload-control-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the SIP Overload Control Working Group of the=
 IETF.

	Title           : Session Initiation Protocol (SIP) Overload Control
	Author(s)       : Vijay K. Gurbani
                          Volker Hilt
                          Henning Schulzrinne
	Filename        : draft-ietf-soc-overload-control-11.txt
	Pages           : 35
	Date            : 2012-11-21

Abstract:
   Overload occurs in Session Initiation Protocol (SIP) networks when
   SIP servers have insufficient resources to handle all SIP messages
   they receive.  Even though the SIP protocol provides a limited
   overload control mechanism through its 503 (Service Unavailable)
   response code, SIP servers are still vulnerable to overload.  This
   document defines the behaviour of SIP servers involved in overload
   control, and in addition, it specifies a loss-based overload scheme
   for SIP.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-soc-overload-control

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-soc-overload-control-11

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-soc-overload-control-11


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


From vkg@bell-labs.com  Wed Nov 21 11:21:27 2012
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Date: Wed, 21 Nov 2012 13:22:46 -0600
From: "Vijay K. Gurbani" <vkg@bell-labs.com>
Organization: Bell Laboratories, Alcatel-Lucent
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Subject: [sip-overload] draft-ietf-soc-overload-control-11 released
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Folks: I have released a new version of the overload control draft [1].

Janet Gunn performed an exhaustive review of -09 version of the draft
(thanks, Janet).  The -10 version of the draft included changes
suggested by Janet's review until Section 4 [2]; this version (i.e.,
-11) includes the changes in Section 5 onwards.

The overload control reference algorithm is the same in both -11 and
-10.

While most of the changes are editorial and designed to reduce
ambiguities when implementing the draft, a couple of changes that may
need closer scrutiny:

a) Interaction between draft-ietf-soc-load-control-event-package and
  this draft was straddled in S5.10.1 and S7 in -10.  In -11, I have
  consolidated this in S7, taking it out from S5.10.1.

b) On the same subject of interaction, whereas -10 stated in S5.10.2
  that:

    A SIP client SHOULD honor user-level load control filters
    installed by signaling neighbors [I-D.ietf-soc-load-control-event-
    package] by sending the SIP messages that matched the filter
    downstream.

  -11 now states in S7 that:

    Local policy will also dictate the precedence of different
    overload control mechanisms applied to the traffic. Specifically,
    in a scenario where load control filters are installed by
    signaling neighbours [I-D.ietf-soc-load-control-event-package]
    and the same traffic can also be throttled using the overload
    control mechanism, local policy will	dictate which of these schemes
    shall be given precedence. Interactions between the two schemes
    are out of scope for this document.

Finally, I had a quick hallway conversation with Adam during the Atlanta
IETF to remind him to review the updated version of the reference
algorithm.  As soon as he does that, and pending the scrutiny of the WG
on the changes in -11, the draft will be ready to move ahead.

Note that I have not yet incorporated the changes being debated on the
list about overload and emergency [3].  As soon as they reach a
consensus point (they seem to be close to it), I will incorporate these
in.

Thanks,

[1] 
http://www.ietf.org/internet-drafts/draft-ietf-soc-overload-control-11.txt
[2] http://www.ietf.org/mail-archive/web/sip-overload/current/msg00847.html
[3] http://www.ietf.org/mail-archive/web/sip-overload/current/msg00848.html

- vijay
-- 
Vijay K. Gurbani, Bell Laboratories, Alcatel-Lucent
1960 Lucent Lane, Rm. 9C-533, Naperville, Illinois 60563 (USA)
Email: vkg@{bell-labs.com,acm.org} / vijay.gurbani@alcatel-lucent.com
Web:   http://ect.bell-labs.com/who/vkg/

From salvatore.loreto@ericsson.com  Thu Nov 29 05:21:15 2012
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Subject: [sip-overload] WGLC: draft-ietf-soc-load-control-event-package
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[as chair]

due to the comments and feedback received during the first one [1],
we have decided to run a second WGLC on the updated version of the draft:
http://tools.ietf.org/html/draft-ietf-soc-load-control-event-package-05

Today we are starting another two-weeks working group last call.
This call ends on Thursday, December 13th.

reviews and comments are really appreciate and requested from all the 
participants cheers


Volker and Salvatore

[1]http://www.ietf.org/mail-archive/web/sip-overload/current/msg00799.html
