Hi all Issue was mismatched MTU. I reduced them down to 2000 after a ping sweep and its been steady since.
On Thu, Jul 18, 2019 at 3:18 AM Mike <[email protected]> wrote: > > On 7/17/19 6:54 AM, Łukasz Bromirski wrote: > >> On 9 Jul 2019, at 17:58, Richard Mikisa <[email protected]> wrote: > >> > >> Hi All, > >> > >> I am running OSPF across a point to point link between a Nexus 7000 > >> and an ASR1000x. > >> > >> The OSPF works fine but every couple of hours, it breaks and neighbor > >> state goes into EXCHANGE and remains there for another 40 minutes or > >> so. It then goes into full, OSPF comes up and all is well for another > >> couple of hours or so and then the cycle starts again. All the time, > >> IP connectivity between the two point to point IPs is up. > > Apart from OSPF config changes already mentioned, check what’s going > > on in your CoPP policies on both ends. This doesn’t look like a directly > > config-related problem, rather environmental (like circuit switchover and > > problems with MTU) but it may also be something related to amount > > of traffic hitting CoPP policies from time to time and OSPF traffic > > overflowing > > defined queues. > > > > You can do some debugging on ip ospf adjacency and such. I have seen > cases like this where there have been duplicate loopback ip's, duplicate > ptp link id's, and such, which cause similar results. The adjacency > debugging should give you more of a reason WHY the adjacency is going down. > > > Post your results if you find the cause. > > > Mike- > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ -- cheers Richard _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
