Hi all,
I have some questions about PBB EVPN.
I haven't find clear explanation in current EVPN RFCs or drafts.
I need some help to check my understanding.
Question 1:
The ESI and B-MAC is assigned to a LAG interface or physical interface,
but it's their sub-interfaces that actually attaches a MAC-VRF instance.
So when the sub-interface fails and it's main-interface is still operational,
The B-MAC for ESI is not withdrawn, and remote PE will continue to load-balance
traffic to the sub-interface.
So all the packet toward the failed sub-interface is drop?
Is this what the RFC 7623 expects?
Question 2:
RFC 7623 6.2.2.1. says that:
In the case where per-I-SID load-balancing is desired among the PE
nodes in a given redundancy group, multiple unicast B-MAC addresses
are allocated per multihomed ES: Each PE connected to the multihomed
segment is assigned a unique B-MAC. Every PE then advertises its
B-MAC address using the BGP MAC Advertisement route.
It means that the ESI B-MAC on the ESI's adjacent PEs is different from each
other.
So how can we do ESI filter by B-MAC comparison(which is discribed in 6.2.1.3)?
Question 3:
The B-Component of PBB EVPN is assumed to be a MPLS EVPN MAC-VRF in RFC7623,
But technically we can use a VXLAN EVPN MAC-VRF instead,
Does it make sense?
Or I don't need to consider this usecase at all?
Question 4:
We have EVPN IRB usecases in MPLS/VXLAN EVPN,
But I don't see there is a EVPN IRB usecase in PBB EVPN from the EVPN IRB
drafts.
So, is this usecase useless? or will it be considered in the future?
I haven't find clear explanation about these questions.
Is there something important I have missed?
Best Regards
Bob_______________________________________________
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