Dear draft-ietf-bess-evpn-virtual-eth-segment-19 co-authors,
I will appreciate your opinion on the following question:
Section 1.3 of this draft explains the vESes in Access MPLS networks, Where the
model described in figure 2 (Quoted below) seems to refer to every single PW as
a "single AC".
One of the implementations by one of the vendors uses a single PW with a bundle
of N VLANS between CE and PE device, where the PE that terminates the PW maps
every VLAN to a different EVI/BD instance, i.e. every {PW,VLANi} combination is
a different "AC".
This is an interesting interpretation but IMHO it does not exactly come to
terms, OR not clearly derived, from the description in Section 1.3.
If this interpretation is acceptable, I suggest that this option shall also be
described in the draft (or in a new RFC***-bis) of this proposed standard.
Looking forward to your response,
Nitsan Dolev
Ribbon Communications
MPLS Aggregation
Network
+-----+ +-----------------+
| CE11|EVC1 | |
+-----+ \ +AG1-+ PW1 +-+---+
Cust. A -0----|===========| |
+-----+ | ---+===========| | +-------+ +---+
| CE12|EVC2-0/ | PW2 /\ | PE1 +---+ | | |
+-----+ ++---+ /=||=| | | +---+PE3+-
| //=||=| | |IP/MPLS| | | \ +---+
| // \/ +-+---+ |Core | +---+ \-+ |
+-----+EVC3 | PW3// LSP1 | |Network| |CE4|
| CE13| \+AG2-+==// | | | +---+ | |
+-----+ 0 |==/PW4 /\ +-+---+ | | | | /-+ |
0 |==PW5===||=| | | +---+PE4+-/ +---+
+-----+ /++---+==PW6===||=| PE2 +---+ | | |
| CE14|EVC4 | \/ | | +-------+ +---+
+-----+ | LSP2+-+---+
Cust. C +-----------------+
/\
||
EVCs
<--802.1Q--> <-----MPLS Agg----> <--- EVPN Network ---> <-802.1Q->
Figure 2: Dual-Homed and Single-homed Network
on MPLS Aggregation networks
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