[bess] RFC9251

[Nitsan Dolev <[e-mail]>]

Dear RFC9251 Co-authors,

Your help with the following questions will be most appreciated,


RFC 9251 seems to assume that the receiving PE will forward:

  1.  (S,G1) traffic only to those host who explicitly sent IGMPv3 report (S,G1) and  those who sent IGMPv3 Report (*,G1)
  2.  (*,G1) traffic only to those host who explicitly sent IGMPv3 report (*,G1) IGMPv2(G1)
Is this indeed the assumption?

Does it mean that the receiving PE shall do an IP Multicast lookup ? i.e. Has MFIB entry with
(S,G1)==> OIF( a, b, c ..) for all local AC ports from which IGMPv3 Report (S,G1)  OR
(*,G1)==> OIF( a, b, c ..) for all local AC ports from which IGMPv3 Report (*,G1) or IGMPv2 report (G1)

Another issue:
Referring to https://www.rfc-editor.org/rfc/rfc9251.html#name-proxy-querier

It says that "As mentioned in the previous sections, each PE MUST have proxy querier functionality for the following reasons:
1.      to enable the collection of EVPN PEs providing Layer 2 Virtual Private Network (L2VPN) service to act as a distributed multicast router with an anycast IP address for all attached hosts in that subnet
2.      to enable suppression of IGMP Membership Reports and Membership Queries over MPLS/IP core"
What shall be the source IP address of the IGMP queries?
Possible Alternatives: 1. The source IP of one of the Routers on the related PE BD  (if exists). 2. Some preconfigured dummy IRB Router Anycast IP address ?

Looking forward to getting your response,

Nitsan Dolev Elfassy
Ribbon Communications

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