Hi Mark,

> I think it serves a very important purpose, which is why I raised it.
> 
> SRv6 SRH says IPv6 addresses can be assigned to nodes, contrary to RFC 4291. 
> What is the Interface Identifier portion of the address called in that case, 
> and where is it specified?
> 
> There needs to be an update to RFC 4291 if IPv6 addresses can now be assigned 
> to nodes.
> 
> I think that RFC 4291 requires that SRv6 requires implementations configure 
> the SID prefix on a virtual or physical interface, rather than leaving it to 
> be an implementation choice.
> 
> It also means there is then no need for a special case SR FIB lookup 
> algorithm, as described in SRH ID 4.3, as the existing, general purpose and 
> all cases IPv6 FIB lookup will work without modification.

Sounds like decent engineering decisions befitting the E in IETF to me!

Cheers,
Sander

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