Hi,
I have a question regarding Section 4.1 of the Virtual Ethernet Segment 
draft<https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-virtual-eth-segment-07#section-4.1>.
This section describes the default DF election procedure defined in RFC 7432 
for virtual Ethernet Segments and says in item 3 (the problematic text is 
highlighted):

Assuming a redundancy group of N PE nodes, the PE with ordinal i is the DF for 
an EVPN instance with an associated Ethernet Tag value of V when (V mod N) = i

My question is, what does the associated Ethernet Tag mean in this context?
Specifically, if the EVI that is attached to the Virtual Ethernet Segment in 
question implements VLAN-based or VLAN Bundle service interface, is associated 
Ethernet Tag value always zero (as it appears in all EVPN routes advertised by 
such an EVI)? If so, then all EVI implementing these types of service 
interfaces and attached to different S-VLAN-delimited Virtual Ethernet Segments 
on the same E-NNI port would elect the PE with the minimal Router Address as 
the DF. In any case, explicit clarification in the text would be most useful.

Your timely feedback will be highly appreciated.

Regards, and lots of thanks in advance,
Sasha

Office: +972-39266302
Cell:      +972-549266302
Email:   [email protected]


Notice: This e-mail together with any attachments may contain information of 
Ribbon Communications Inc. and its Affiliates that is confidential and/or 
proprietary for the sole use of the intended recipient. Any review, disclosure, 
reliance or distribution by others or forwarding without express permission is 
strictly prohibited. If you are not the intended recipient, please notify the 
sender immediately and then delete all copies, including any attachments.
_______________________________________________
BESS mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/bess

Reply via email to