Subject: [spring] FW: New Version Notification for draft-xu-spring-islands-connection-over-ip-03.txt

From: Xuxiaohu <[email-masked]>
Date: Thu, 4 Dec 2014 07:06:53 +0000

Hi all,

This draft describes a very simple mechanism for incremental deployment of the MPLS-SPRING technology. The basic idea is to allow MPLS-SPRING packets to traverse IP-only networks before reaching the next explicit hop via any kind of MPLS-over-IP encapsulation tunnels. This approach is very useful in the case where only a few limited number of nodes would be specified as explicit hops, e.g., for the remaining nodes, IP forwarding is enough and therefore there is no need for any change to the control plane and data plane of those nodes. 

On the other hand, this approach could also be looked as an improvement to the IPv6-SPRING which is useful in some special network environments. For instance, in the network environment where MTU is still a concern, to avoid the packet size from becoming too big due to imposing an SR header, it seems reasonable to replace the ordered list of 128-bit IPv6 addresses by a ordered list of short segment-ids (e.g.., 32-bit or even shorter). The MPLS label could exactly be used as that short segment-id. One major benefit of IPv6-SPRINg is that only those nodes which would be used as explicit hops are required to be upgraded while the remaining nodes could be kept unchanged. By replacing the IPv6-SR header with an MPLS label stack, the above benefit is still available while the MTU concern is solved.

Any comments are welcome.

Best regards,
Xiaohu

> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]]
> Sent: Thursday, December 04, 2014 11:41 AM
> To: Xuxiaohu; Robert Raszuk; Xuxiaohu; Uma Chunduri; Uma Chunduri; Robert
> Raszuk
> Subject: New Version Notification for
> draft-xu-spring-islands-connection-over-ip-03.txt
> 
> 
> A new version of I-D, draft-xu-spring-islands-connection-over-ip-03.txt
> has been successfully submitted by Xiaohu Xu and posted to the IETF repository.
> 
> Name:		draft-xu-spring-islands-connection-over-ip
> Revision:	03
> Title:		Connecting MPLS-SPRING Islands over IP Networks
> Document date:	2014-12-03
> Group:		Individual Submission
> Pages:		5
> URL:
> http://www.ietf.org/internet-drafts/draft-xu-spring-islands-connection-over-ip-
> 03.txt
> Status:
> https://datatracker.ietf.org/doc/draft-xu-spring-islands-connection-over-ip/
> Htmlized:
> http://tools.ietf.org/html/draft-xu-spring-islands-connection-over-ip-03
> Diff:
> http://www.ietf.org/rfcdiff?url2=draft-xu-spring-islands-connection-over-ip-03
> 
> Abstract:
>    MPLS-SPRING is a source routing paradigm in which a sender of a
>    packet is allowed to partially or completely specify the route the
>    packet takes through the network by imposing stacked MPLS labels to
>    the packet.  The current MPLS-SRPING architecture requires an end-to-
>    end MPLS Label Switched Path (LSP) between any two MPLS-SPRING-
>    enabled routers (e.g., two adjacent hops of a given explicit path).
>    In order to enable MPLS-SPRING-enabled routers to be deployed even
>    when there are non-MPLS routers along the path between two MPLS-
>    SPRING-enabled routers, it is desirable to have an alternative, which
>    allows the use of IP-based tunnels (e.g., GRE tunnels) to connect two
>    MPLS-SPRING-enabled routers.  This document describes a mechanism for
>    such usage.
> 
> 
> 
> 
> 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