[c-nsp] 3750E to stack of 2960x.....

[Scott Voll]

Follow up..... Bug CSCul88801
SFP's become unavailable....

Scott


On Thu, Mar 6, 2014 at 7:23 AM, Scott Voll <svoll.voip at gmail.com> wrote:

> We have a VTP domain.  so they are set to client.
>
> But I think we are now thinking it's a SFP issue.
>
> we have had several 2960X's in the lab that will not recognize the SFP
> (glc-t) unless we reboot.  Then they are recognized and we use them.
>  Yesterday we had on stack that lost it's primary sfp and looking at the sh
> interface it shows no hardware in the SFP slot.  But after a reboot it came
> back to life.
>
> I know that putting a GLC-T in a SFP+ slot is overkill, but we have not
> moved our new Nexus gear in yet to move to the 10 Gig SR stuff.  in the
> compatiblity matrix it shows the GLC-T as supported in the spf+ slots of
> the 2960X switch.  So is this a Bug?  Bug scrub comes up with nothing.
>
> TIA
>
> Scott
>
>
> On Thu, Mar 6, 2014 at 3:03 AM, Darren O'Connor <darrenoc at outlook.com>wrote:
>
>> If you think its spanning-tree you really need to check that it is. If it
>> happens again make sure you console on and check the spanning-tree state
>> before you reboot it. Are you actually running VTP? Did you turn VTP to
>> transparent or off?
>>
>> Thanks
>> Darren
>> http://www.mellowd.co.uk/ccie
>>
>>
>>
>> > Date: Tue, 4 Mar 2014 12:41:13 -0800
>> > From: svoll.voip at gmail.com
>> > To: blake.mailinglist at pfankuch.me
>> > CC: cisco-nsp at puck.nether.net
>> > Subject: Re: [c-nsp] 3750E to stack of 2960x.....
>>
>> >
>> > 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 <
>> > blake.mailinglist at pfankuch.me> 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:cisco-nsp-bounces at puck.nether.net] On Behalf
>> Of
>> > > Scott Voll
>> > > Sent: Tuesday, March 4, 2014 8:19 AM
>> > > To: cisco-nsp at puck.nether.net
>> > > 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 cisco-nsp at puck.nether.net
>> > > https://puck.nether.net/mailman/listinfo/cisco-nsp
>> > > archive at http://puck.nether.net/pipermail/cisco-nsp/
>> > >
>> > _______________________________________________
>> > cisco-nsp mailing list cisco-nsp at puck.nether.net
>> > https://puck.nether.net/mailman/listinfo/cisco-nsp
>> > archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
>
>