I guess it worth clarify CE using LAG or L2 switching to connect to PE in the question. Thanks Tim
On Wed, 13 Feb 2019, 07:51 Mrinmoy Ghosh (mrghosh) <mrgh...@cisco.com wrote: > Hi Jaikumar, > > > > EVPN Single active heavily depends upon MAC Flush mechanism like MVRP or > TCN Flush. > > > > In your topology, initially CE1 would flood unknown ucast to both PE1 and > PE2; PE1 being DF will send and receive traffic for that (ES, EVI), hence > once the traffic will be learned eventually from PE1. > > However on switchover, Mac flush is sent to CE so that the forwarding > table is flushed and the traffic is flooded to both PE until learned from > the new DF. > > > > Thanks, > > Mrinmoy > > > > *From:* BESS <bess-boun...@ietf.org> *On Behalf Of * Jaikumar Somasundaram > *Sent:* Tuesday, February 12, 2019 10:11 PM > *To:* bess@ietf.org > *Cc:* Pradeep Ramakrishnan <pradeep.ramakrish...@ericsson.com>; > Chalapathi Andhe <chalapathi.an...@ericsson.com> > *Subject:* [bess] A question on CE behavior on traffic forwarding to EVPN > multihomed PEs in single-active mode > > > > Hello All, > > > > In EVPN MH with Single-Active scenario, could you help us to clarify the > below query? > > > > -------------- > > | | > > PORT1 | DEVICE1 |PORT3 > > --------------| PE1 |------------- > > | 1/5 | 2.2.2.2 | 1/4 | > > | | | | > > | -------------- | > > |PORT1 |PORT2 |PORT2 > > -------------- | +------------+ > -------------- > > | | | | | > | | > > | DEVICE4 | | | |PORT1 | > DEVICE4 | > > | (CE1) | | | DEVICE3 |------------| > (CE2) | > > | Multi-home | | | PE | PORT3| > Single home| > > | | | | 4.4.4.4 | > | | > > -------------- | +------------+ > -------------- > > |PORT2 |1/1 |PORT3 > > | |PORT2 | 1/6 > > | -------------- | > > | | | | > > | PORT1 | DEVICE2 | | > > --------------| PE2 |------------- > > 1/4 | 3.3.3.3 |PORT3 > > | |1/4 > > -------------- > > > > Let’s say CE1 is connected to PE1 and PE2 (single-active case) > > and PE1 is the DF for VLAN 10 and has the active link, > > but CE1 sends unknown unicast traffic on the link to PE2 (standby link), > > wouldn’t the traffic be dropped because its non-DF ? > > > > or > > > > How does CE ensure traffic is always forwarded on the active link > > (as standby link will drop the traffic) ? > > > > Thanks & Regards > > Jaikumar S > > > _______________________________________________ > BESS mailing list > BESS@ietf.org > https://www.ietf.org/mailman/listinfo/bess >
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