Parag –
From: parag kaneria <[email protected]>
Sent: Friday, March 4, 2022 3:45 AM
To: [email protected]; Les Ginsberg (ginsberg) <[email protected]>
Subject: Need Clarification on RFC6213
Hello All,
I would like to clarify below 2 cases
R1-------------------------R2
R1: Default topo ( MTID 0 ) , Speak IP and IPV6
R2: Multi-topo ( MTID 0 , 2, 3), Speak IP and IPv6
[LES:] This is a misconfiguration.
For a given topology (AKA MTID), all routers MUST support the same set of
NLPIDs. Failure to do so leads to misforwarding. RFC 1195 Section 1.4 is
relevant here.
In your example. R1 is using MTID 0 for IPv4 and IPv6.
But R2 is using MTID 0 for IPv4 only.
And, of course, MTIDs 2 and 3 aren’t supported by R1 at all.
Nothing is going to work.
Your problems have nothing to do with the use/non-use of BFD.
Les
Case 1: both side configured with ipv4 and ipv6 bfd on interface.
Should adj in up state ?
Case 2: R1 only configured with ipv4 bfd on interface. R2 configured ipv4 and
ipv6 bfd on interface.
Should adj be in up state ?
Regards
Parag
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