nanog mailing list archives
Re: IPv6: numbering of point-to-point-links
From: Gary Buhrmaster <gary.buhrmaster () gmail com>
Date: Mon, 31 Jan 2011 13:52:19 -0800
On Mon, Jan 31, 2011 at 09:13, Blake Hudson <blake () 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.
Current thread:
- Re: IPv6: numbering of point-to-point-links, (continued)
- Re: IPv6: numbering of point-to-point-links Marco Hogewoning (Jan 24)
- Re: IPv6: numbering of point-to-point-links bmanning (Jan 24)
- Re: IPv6: numbering of point-to-point-links Jack Bates (Jan 24)
- Re: IPv6: numbering of point-to-point-links Crist Clark (Jan 24)
- Re: IPv6: numbering of point-to-point-links Owen DeLong (Jan 24)
- Re: IPv6: numbering of point-to-point-links Randy Bush (Jan 24)
- Re: IPv6: numbering of point-to-point-links Blake Hudson (Jan 31)
- Re: IPv6: numbering of point-to-point-links Randy Bush (Jan 31)
- Re: IPv6: numbering of point-to-point-links Blake Hudson (Jan 31)
- Re: IPv6: numbering of point-to-point-links Randy Bush (Jan 31)
- Re: IPv6: numbering of point-to-point-links bmanning (Jan 24)
- Re: IPv6: numbering of point-to-point-links Gary Buhrmaster (Jan 31)
- Re: IPv6: numbering of point-to-point-links Seth Mattinen (Jan 31)
- Re: IPv6: numbering of point-to-point-links Marco Hogewoning (Jan 24)
- Re: IPv6: numbering of point-to-point-links Skeeve Stevens (Jan 24)
- Re: IPv6: numbering of point-to-point-links ML (Jan 26)
- Re: IPv6: numbering of point-to-point-links Tim Durack (Jan 25)