Hi,
Questions: 1. Will the node in backup mode forward the packet to CE? [JORGE] as soon as it becomes DF it can forward packets to the CE. The backup node will have to run DF election upon the ES route withdrawal from the primary. If AC-DF is enabled, it can also react to the withdrawal of AD routes from the primary PE. 1. Will all the nodes in backup mode forward the packet before DF election? [JORGE] Only the new DF can forward. 3. If they forward, how is duplicate packets handled, in this case? [JORGE] see above. My two cents.. Thanks. Jorge From: BESS <[email protected]> on behalf of Jaikumar Somasundaram <[email protected]> Date: Thursday, October 4, 2018 at 10:03 AM To: "[email protected]" <[email protected]> Cc: Jiang He <[email protected]>, P Muthu Arul Mozhi <[email protected]> Subject: [bess] EVPN MH: Backup node behavior in Primary Path Failure Hello Everyone, Sorry if it is a duplicate. I repost this query as I did not receive any response yet. (I was wondering if this mail already reached the group or not) I have a question on Primary PE encountering a failure in EVPN multihoming in single active mode. RFC7432, section 14.1.1: <snip> If there is more than one backup PE for a given ES, the remote PE MUST use the primary PE's withdrawal of its set of Ethernet A-D per ES routes as a trigger to start flooding traffic for the associated MAC addresses (as long as flooding of unknown unicast packets is administratively allowed), as it is not possible to select a single backup PE. </snip> Questions: 1. Will the node in backup mode forward the packet to CE? 2. Will all the nodes in backup mode forward the packet before DF election? 3. If they forward, how is duplicate packets handled, in this case? Please help me anwere these questions. Thanks & Regards Jaikumar S
_______________________________________________ BESS mailing list [email protected] https://www.ietf.org/mailman/listinfo/bess
