Stefano, Thanks. Is there a mechanism to advertise different label blocks for v4 and v6 and have a single unique index value associated with the node? This would still result in different label values being used for v4 and v6 packets destined for the same node, but the network operator only has to assign a single unique index value to each node.
Chris -----Original Message----- From: Stefano Previdi (sprevidi) [mailto:[email protected]] Sent: Tuesday, September 02, 2014 10:21 AM To: Chris Bowers Cc: [email protected]; [email protected] Subject: Re: [spring] carrying IPv6 and IPv4 packets using SPRING/SR with MPLS dataplane Hi Chris, On Sep 2, 2014, at 5:12 PM, Chris Bowers wrote: > Has there been any discussion about how to carry both IPv6 and IPv4 packets > with SPRING/SR MPLS labels? From what I can tell, neither > draft-filsfils-spring-segment-routing-04 nor > draft-filsfils-spring-segment-routing-mpls-03 addresses this scenario. sid's are assigned to ip addresses (e.g. intf addresses). A node having two loopbacks (v4/v6) will have a sid for the ipv4 address and another one for the ipv6. Then you compute your spt's or explicit paths based on your af-topology and you pick the right sid's stack. > In the context of shortest-path forwarding using Node-SID labels, there would > seem to be two main approaches to consider. One could distinguish between > IPv6 and IPv4 packets by using two different Node-SID labels for the same > node. correct. this is same as above: one sid per address (one for v4 and one for v6). s. > Or one could use IPv6 and/or IPv4 Explicit Null labels pushed on the bottom > of the label stack by the SR ingress router. > > Do the authors of these drafts or other working group participants have an > opinion on the best way to address this scenario? > > Thanks, > Chris > > > > _______________________________________________ > spring mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/spring _______________________________________________ spring mailing list [email protected] https://www.ietf.org/mailman/listinfo/spring
