[Snac] IPv6 prefix on AIL
"Pascal Thubert (pthubert)" <pthubert@cisco.com> Wed, 24 May 2023 08:02 UTC
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "draft-ietf-snac-simple@ietf.org" <draft-ietf-snac-simple@ietf.org>
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Thread-Topic: IPv6 prefix on AIL
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Subject: [Snac] IPv6 prefix on AIL
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Dear authors: Section 5.1 says "In order to provide IPv6 routing to the stub network, IPv6 addressing must be available on each adjacent infrastructure link". Reading further, I read that the stub router may need to inject a prefix in the AIL if none is present so that global addresses may be formed. Is that really the intent? The way I see it, the AIL could be a distribution (transit) link between an aggregator and a number of stub gateways, with no host on link. For the aggregator to route to the stub routers, and stub routers to route to the aggregator, link local addresses are sufficient and they are always there as soon as IPv6 is enabled. The stub router is reachable at an address inside the stub network, no need of an address in the AIL. OTOH, if there are hosts on the AIL and the stub router is not service the AIL as gateway, it should not send RAs there, and addressing for the hosts is someone else's problem. What am I missing? Pascal
- [Snac] IPv6 prefix on AIL Pascal Thubert (pthubert)