Are you talking about control or data plane? Data plane has to run over a datagram service or you're back to the TCP-over-SSH type of problems (not to mention performance issues).
===== Mistyped and autocorrected on a clunky virtual keyboard On 7. sep. 2012, at 20:09, Patrick Frejborg <[email protected]> wrote: > Ivan, > > I have been following this discussion for a while, think we could > avoid having IGP on the NVE in the hypervisor by changing the > transport protocol to a multipath enabled one such as SCTP/MPTCP. > > By doing that no need to have an IGP/BGP on the NVE and you can > aggregate NVE IP addresses at the underlying network because the > multpath transport protocol would take care of liveness problem. If a > multi-homed NVE (e.g. two NICs to two separate ToRs) knows the remote > NVEs locators (two Nics, two ToRs) the multi-path protocol has the > possible to setup four paths to the remote NVE (Local locator > 1->Remote Locator1, LL1-RL2, LL2->RL1 and LL2->RL2). The consequences > of this is that some of the traffic engineering is moved away from the > network to transport protocol, check out this study > http://www-malted.cs.ucl.ac.uk/staff/M.Handley/papers/multipath_dc_hotnets.pdf > > The demarcation point between the hypervisor based NVE and the ToR > becomes simple, i.e. IP subnets and the underlying network doesn't > need to exchange much information to the NVE. > > And when we get to the storage part we can maintain the air gap > between the two fabrics by leveraging SCTP/MPTCP - I'm thinking of > lossless iSCSI here and if the storage target supports multipath > transport protocol we can build SANs as we do today and maintain the > best practices. > > Think it would be worthwhile to have a look on what SCTP/MPTCP can > offer, it seems that they might simplify things quite a lot. > > Patrick > > On Fri, Sep 7, 2012 at 8:23 PM, Ivan Pepelnjak <[email protected]> wrote: >> On 9/7/12 6:23 PM, Lucy yong wrote: >> [...] >>> >>> To use MPLS/VPN, you have a IGP network as underlay network first. If >>> NVE acts as PE. The server need to participate IGP first, the >>> loopback address of server is advertised in IGP. It does not matter >>> how many nics exist, the ecmp make it work. >> >> >> Ah, that's how it works. Thank you! Now I get it. >> >>> If the server does not run IGP protocol and act as a IP host in >>> underlay network. This seems not aligning with the nvo3 framework and >>> MPLS/VPN architecture. >> >> >> Then I sincerely apologize for wasting everyone's time and bandwidth. >> >> Thank you for your guidance, >> Ivan >> _______________________________________________ >> nvo3 mailing list >> [email protected] >> https://www.ietf.org/mailman/listinfo/nvo3 _______________________________________________ nvo3 mailing list [email protected] https://www.ietf.org/mailman/listinfo/nvo3
