[147403] in North American Network Operators' Group
Re: Juniper <-> Cisco IPv6 BGP peering
daemon@ATHENA.MIT.EDU (Randy Carpenter)
Fri Dec 9 11:39:56 2011
Date: Fri, 09 Dec 2011 11:38:44 -0500 (EST)
From: Randy Carpenter <rcarpen@network1.net>
To: Jen Linkova <furry13@gmail.com>
In-Reply-To: <CAFU7BATdm3HASc91nZ8gC3fwYSOOkxUz8i-13XfWxx30OqwO3w@mail.gmail.com>
Cc: Nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
----- Original Message -----
> On Thu, Dec 8, 2011 at 11:53 AM, Randy Carpenter
> <rcarpen@network1.net> wrote:
> > Tried that. I agree with others that it is an NDP issue. NDP for
> > the GUA is fine, but just not for the link local. Is there
> > something that would block only link local by default?
> >
> > I should add that I have another uplink to a different provider
> > that works perfectly. The other end is Juniper for that one.
>
> Just to begin with:
> 0) Does your Juniper device have the neighbor cache entry for Cisco
> link-local address? What is the state of the entry?
Sometimes it does, sometimes I can't seem to get it.
> Can you get packet capture on both sides?
We have done this.
> 1) is Cisco sending NS packets?
Yes.
> 2) is your Juniper receiving them?
It does not appear to. Tracing v6 stuff on juniper seems to be hit or miss.
> 3) is Juniper device sending anything back?
No. (because of #2)
> 4) are those NA reaching Cisco?
No. (because of #2)
> Any switch on the path?
It is an L2 circuit that rides a couple of different pieces of gear before it lands at the other side.
> [lazy mode on] I'd also suggest:
> - debug ipv6 nd on cisco
> - checking for bugs for IOS and JunOS versions you are using
