Hi Ali, Sasha, minor comment in case it wasn't already clear - each PE still learns all MACs in the control plane (for mobility procedures to work) but only locally connected MACs are installed in the forwarding plane. Hence the optimization. Ali, please confirm.
Thanks, Neeraj On Mon, Nov 6, 2023 at 11:37 AM Ali Sajassi (sajassi) <sajassi= 40cisco....@dmarc.ietf.org> wrote: > Hi Sasha, > > > > Each PE only learns local MAC addresses and NOT remote ones. So, lets says > you have a subnet that is stretched across 10 PEs and each PE has 100 > locally connected hosts. So, the total number of MAC addresses for the > subnet is 1000 (10X100) but each PE ONLY learns 100 MAC addresses. This is > in contrast with the traditional EVPN-IRB where each PE learns all 1000 MAC > addresses. > > > > Cheers, > > Ali > > > > *From: *BESS <bess-boun...@ietf.org> on behalf of Alexander Vainshtein < > alexander.vainsht...@rbbn.com> > *Date: *Monday, November 6, 2023 at 5:31 AM > *To: *draft-sajassi-bess-evpn-l3-optimized-...@ietf.org < > draft-sajassi-bess-evpn-l3-optimized-...@ietf.org> > *Cc: *bess@ietf.org <bess@ietf.org>, Nitsan Dolev <nitsan.do...@rbbn.com> > *Subject: *[bess] A question about > draft-sajassi-bess-evpn-l3-optimized-irb > > Hi, > > This the question I have tried to ask during the meeting. > > > > The Introduction to draft in question > <https://datatracker.ietf.org/doc/html/draft-sajassi-bess-evpn-l3-optimized-irb-00#section-1> > claims “improving MAC scalability of customer bridges and PE devices > significantly”. > > The first of these claims is easy to understand: each specific CE switch > has to learn just one MAC address (that of the optimized IRB) in addition > to MAC addresses of its locally attached hosts. > > > > But I have doubts about the second of these claims: to the best of my > understanding, each PE attached to the subnet in question will learn MAC > addresses of all attached hosts in the subnet. > > > > What, if anything, did I miss? > > > > Regards, and lots of thanks in advance, > > Sasha > > > > > > *Disclaimer* > > 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 > BESS@ietf.org > https://www.ietf.org/mailman/listinfo/bess >
_______________________________________________ BESS mailing list BESS@ietf.org https://www.ietf.org/mailman/listinfo/bess
