On Mon, Jan 31, 2011 at 09:13, Blake Hudson <bl...@ispn.net> wrote: .... > I setup a p2p /127 link and found that BGP would not peer over the link; > Changing to /126 resolved the problem. I never looked into it further > because I had intended to use /126 from the start. My guess is that > while BGP should be a unicast IP, Cisco's implementation uses an anycast > in some cases, disregarding the configured unicast address. > > Just one practical example...
I suspect this is very platform/version specific, as I have run BGP on a Cisco 6500 (SXI<mumble>) to a Juniper MX and we had no trouble with a /127 (although prepared to move to a /126 or whatever if needed). As always, your environment will vary. I would open a TAC case on the principal that it should work.
