[j-nsp] Odd issue with logical-system

Eric Van Tol eric at atlantech.net
Sun Sep 17 09:43:31 EDT 2017

Hi all,
To Aaron - Yes, that map is correct.

> I have 40+ logical systems in a 4 chassis lab, all speaking 
> BGP withloads of families negotiated.

I've never had this problem with logical systems before except with this one router (MX1). It happened a couple years ago - the exact same thing - and I ended up moving the logical system off this router because I didn't have time to troubleshoot it, nor was it that important that the LS exist on this router.

> Start with the easy stuff.  Did you fat finger an ASN or an MD5 key?
> Did you set type internal?  Your trace options and show bgp neighbor
> output should help you determine the failure if it's an application
> layer issue.

Thanks, I did check all this and re-entered MD5 keys by pasting in on all 4 routers. The fact that only one session out of the bunch isn't coming up indicates that it's not an MD5 or ASN issue, though, as they are all defined within groups and not individual definitions within the neigbhor statements. Traceoptions simply show that the attempts timed out. LS1 is not responding at all to the incoming request from MX2, nor is it even *sending* a TCP SYN to MX2 in its own supposed session request (LS1 is not in passive mode). 

IPv6 peering between all four nodes is working, too.

I feel like this is going to end up a JTAC ticket, but wanted to know if anyone else had ever seen this behavior. I may end up rebooting MX1 to see if that fixes it, but I'd prefer not to do the Roy and Moss Method if I can help it.


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