[vpp-dev] IPv6 fragmentation at SRv6 encap node

[Yosh Kikuchi]

Hi vpp-devs,

I have a one question.
Does VPP support IPv6 fragmentation at SRv6 encap node?

>From RFC2473 section 7, My understanding is that the encap node attempt to
fragment when a outgoing encapsulated packet mtu size is over MTU, but it
doesn't.
Is that my missunderstanding?
The situation is as follows.

A---B---C---D---E

packet P1=(A, E)
P1 MTU > intf B to C MTU
Node B receives P1 from A, and encap it with sid list
B attempt to send P2=(B, C)(D, C; SL=1)(A, E) which is over MTU.
B send ICMPv6 PTB P3=(b, B)(icmpv6 type=2) (B, C) (D, C; SL=1)(A, E)
note:b is B intf addr towards A.
B drop the ICMPv6

Thanks,
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[vpp-dev] Questions about SIDs

[Yosh Kikuchi]

Hi VPP-dev,

I have a few questions about SIDs.
I have configured SRv6 network(no IGP) for test purpose, and it works fine.
But I am a little confused about variety of SIDs.

To create an SID, I use the command "sr localsid address".
Is this what we call a "prefix sid" or a "node sid" ?
How do I configure an "adjacency sid" ?

Regards,
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