The point is that the CE does not realize that it is multihomed. The access node implements the multihoming, but the CE has only one BGP session and one interface. The APE-SPE connections is an ethernet with the same ESI towards SPE1 and SPE2 The SPEs talk EVPN, using route type 5 to implement an L3VPN service. This provides the ESI and mass withdrawal that RFC4364 routes do not.
--Jakob From: BESS [mailto:[email protected]] On Behalf Of Henderickx, Wim (Wim) Sent: Wednesday, November 04, 2015 9:46 PM To: Jeffrey (Zhaohui) Zhang <[email protected]>; [email protected] Subject: Re: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt IF you do Edge-PIC this is optional afais. From: "Jeffrey (Zhaohui) Zhang" <[email protected]<mailto:[email protected]>> Date: Thursday 5 November 2015 at 14:44 To: Wim Henderickx <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt My understanding is that an IP-VPN PE would not be able take advantage of “mass-withdraw”? From: Henderickx, Wim (Wim) [mailto:[email protected]] Sent: Thursday, November 05, 2015 2:42 PM To: Jeffrey (Zhaohui) Zhang <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]> Subject: Re: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt Is the draft assuming also IP-VPN in the core or only EVPN? I don’t see a reason for excluding one or another From: "Jeffrey (Zhaohui) Zhang" <[email protected]<mailto:[email protected]>> Date: Thursday 5 November 2015 at 14:40 To: Wim Henderickx <[email protected]<mailto:[email protected]>>, "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: RE: draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt I did not get that either until Ali confirmed that in the meeting. I had thought that SPEs were running regular L3VPN (not EVPN) but the ones that a CE multi-home to would also use EVPN procedures. Now it looks like there is no “regular” L3VPN – everything is EVPN. Jeffrey From: BESS [mailto:[email protected]] On Behalf Of Henderickx, Wim (Wim) Sent: Thursday, November 05, 2015 2:25 PM To: [email protected]<mailto:[email protected]> Subject: [bess] draft-sajassi-bess-evpn-l3vpn- multihoming-00.txt Maybe good to clarify in this draft which nodes are involved in EVPN from the drawing on p3 in https://www.ietf.org/proceedings/94/slides/slides-94-bess-11.pdf? Did I understood correctly in the meeting that this is required between all SPE(s), if so why?
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