My comments are inserted below: > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > Ivan Pepelnjak > Sent: Friday, August 31, 2012 2:23 AM > To: 'Somesh Gupta'; [email protected] > Subject: Re: [nvo3] Support for multi-homed NVEs > > This is definitely an interesting can of worms ;)
[Linda] Strongly agree. The WG should decide if this scenario should be included in the scope. > > While I don't think we should go down the path of IP-A/IP-B networks > similar to some other DC technology, we will face the reality of some > NVE elements (hypervisor soft switches) not being underlay IP routers. > > We could either: > > (A) ignore the issue and expect the network designer to solve it using > any one of the existing NIC teaming/MLAG kludges while retaining a > single encapsulation IP address per NVE; [Linda] When NIC teaming/MLAG is used, you are assuming that the external switch is the two NICs on the server are connected by Layer 2, is it correct? If NVE is at the NIC, how to use NIC teaming or MLAG? > > (B) provide support for multiple encapsulation addresses per NVE so a > multi-homed NVE could have one IP address per physical interface and > send and receive nvo3-encapsulated frames using more than one address. [Linda] Then the remote NVE will have two possible (IP) addresses to send data back. Who is responsible for balancing the inbound traffic? > > Option (A) is the easy way out similar to existing MPLS/VPN behavior > and would fit well with existing DC deployments. It would also retain > all the server-to-ToR multihoming complexity. [Linda] I am not sure if Option (A) is simpler. > > Option (B) would reduce the complexity of the underlay DC network > (which would become a simple L3 network with single-homed IP addresses), > but we'd have to deal with a bunch of additional problems (peer IP > address liveliness check). > > Just speculating ... > Ivan > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On Behalf > Of > > Somesh Gupta > > Sent: Friday, August 31, 2012 6:58 AM > > To: [email protected] > > Subject: [nvo3] Support for multi-homed NVEs > > > > I did not see any mention of multi-homed NVEs in draft-lasserre-nvo3- > > framework-03.txt. NVEs are connected together by an L3 network - does > that > > mean only one? > > Can it be multi-homes to two L3 networks? > > > > Somesh > > _______________________________________________ > > nvo3 mailing list > > [email protected] > > https://www.ietf.org/mailman/listinfo/nvo3 > > _______________________________________________ > nvo3 mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/nvo3 _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
