uplinks are Copper SFP's 1 gig. all cisco branded GLC-T. IOS on the 2960x is latest 15 ex4 code.
I think it might be a spanning tree issue. we found that the legacy devices were still using pvst rather than rapid pvst. we are going to update everything to Rapid pvst and see if we have any more issues. Unfortunately I was not able to see the console before someone rebooted them. Looks like the switches were up and working..... just the uplinks were not. No CDP from the 3750E. TIA Scott On Tue, Mar 4, 2014 at 11:44 AM, Blake Pfankuch - Mailing List < [email protected]> wrote: > What kind of uplinks? Fiber or Copper? SFP? 1gig or 10gig? Cisco > Branded SFP? IOS Versions on all affected devices? > > Thanks, > Blake > > -----Original Message----- > From: cisco-nsp [mailto:[email protected]] On Behalf Of > Scott Voll > Sent: Tuesday, March 4, 2014 8:19 AM > To: [email protected] > Subject: [c-nsp] 3750E to stack of 2960x..... > > I have a building that has a 3750E at the core and access layer with some > new 2960X's > > I have both a stack of two and a single. > > Both have a port channel up to the 3750E. > > Both have now lost there uplinks to the 3750E within two days of being > installed. > > Anyone have any ideas as to what to look for? > > I see nothing in the syslogs of either the 2960x or the 3750E. > > I'm thinking Spanning tree? or VTP? or ?????? > > Areas you would look at? > > TIA > > Scott > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
