[c-nsp] BGP neighbor not establishing session

[Lobo]

On 11/23/2010 6:14 AM, Mark Tinka wrote:
> Can't think of why this would be an issue.
> The longest distance we have today between two iBGP
> neighbors is 160ms (and soon, the farthest we'll have will
> be about 230ms), and that has no problems at all.
>
> I'd suspect MTU issues here.
>
> Cheers,
>
> Mark.

It's looking like it somehow might be related to that.  For a test, we 
set the mtu on the toro-router2's interfaces back to 1500 from 9216.  
After that was done, the sessions to the vanc routers both came up!  
Strange because we didn't change any of the mtus on the vanc 
routers.....they're all still 9216.

One thing I didn't mention before was that all of the interfaces on 
these routers had jumbo frames turned on.  The cloud between toro and 
vanc though is mostly limited to 1546 but this has never posed a problem 
before with the previous IOS versions.

Jose

P.S. I've opened up a TAC case as well to see if they can figure 
something out.