On Dec 17, 2012, at 10:18 , "NAPIERALA, MARIA H" <[email protected]> wrote:
> Intra-subnet traffic can be also handled by a layer 3 overlay. Let me expand. I see the need for E-VPN for non-IP traffic. This is real, and is not met by IP VPNs (news flash!) For IP traffic, whether intra and inter-subnet, IP VPNs suffice. The solution is simple: route if IP, bridge if not. Yes, one could do IRB, but why? IRB brings in complications, especially for multicast. I'm sure someone suggested this already, so put me down as supporting this view. A NVE that supports both E-VPN and IP VPN for a given tenant simply sends IP traffic to the IP VPN and sends the rest to E-VPN. How this happens is implementation specific. Note that this assumes that the NVE intercepts ARPs and responds to them with the same MAC. Does anyone see a problem with this? If there is a case for _only_ intra-subnet traffic, one may create an E-VPN to handle both IP and non-IP; but I suspect this is a rare case. >From that point of view, I would like to see E-VPNs in the data center >*always* coupled with IP VPNs, and only dealing with non-IP traffic. This may appear drastic, but I think operationally, this is will simplify things. As always, I am open to alternate suggestions, provided they are presented without religion or politics. I'm especially keen to hear from those deploying. Kireeti. _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
