[c-nsp] vlan limit hit...but havent?

[Robert Williams]

Hi, try to find one 'active' vlan number on that list (from the circa 30) which you think should not actually exist. Then try and track it and see where it may be active. Rogue trunk port, created but shut down vlan or subinterface or similar, maybe check spanning tree also for clues? Cheers!



Robert Williams

Backline / Operations Team

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On 20 Nov 2012, at 05:12, "CiscoNSP_list CiscoNSP_list" <cisconsp_list at hotmail.com<mailto:cisconsp_list at hotmail.com>> wrote:


thanks Robert - vtp pruning is not enabled (And switch was reloaded recently when IOS was updated)


"sh vlan br | count act"  reports 254 though:

Number of lines which match regexp = 254


Any idea where the switch is getting the existing vlan number of 220?

Number of existing VLANs          : 220


Cheers.


> From: Robert at CustodianDC.com<mailto:Robert at CustodianDC.com>
> To: cisconsp_list at hotmail.com<mailto:cisconsp_list at hotmail.com>; cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>
> Date: Sat, 17 Nov 2012 08:38:51 +0000
> Subject: RE: [c-nsp] vlan limit hit...but havent?
>
> Hi,
>
> Just an idea, but have you tried "vtp pruning" in the config? If it is a bug then maybe it's a result of not clearing VLANs which were previously present but have been removed or re-numbered. Perhaps they are stuck in the VTP DB/cache pending a reload or similar event.
>
> I know you are in transparent mode, but interestingly we have some 2960G units which show pruning as 'enabled' even though VTP is off globally:
>
> #sh run | inc vtp
> vtp mode off
>
> #sh vtp stat
> VTP Version capable : 1 to 3
> VTP version running : 3
> VTP Domain Name :
> VTP Pruning Mode : Enabled
> VTP Traps Generation : Disabled
> Device ID : x.x.x
>
> Feature VLAN:
> --------------
> VTP Operating Mode : Off
> Number of existing VLANs : 42
> Number of existing extended VLANs : 0
> Maximum VLANs supported locally : 255
>
> Ours are running 15.0(2)
>
> Maybe you can also check:
>
> sh vlan br | count act
> sh vlan | count enet
>
> Just out of curiosity, cheers!
>
>
> Robert Williams
> Backline / Operations Team
> Custodian DataCentre
> tel: +44 (0)1622 230382
> email: Robert at CustodianDC.com<mailto:Robert at CustodianDC.com>
> http://www.custodiandc.com/disclaimer.txt
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net<mailto:cisco-nsp-bounces at puck.nether.net> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of CiscoNSP_list CiscoNSP_list
> Sent: 17 November 2012 06:32
> To: cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>
> Subject: [c-nsp] vlan limit hit...but havent?
>
>
>
> Cisco 2960G - 255 vlans allowed, currently have 220 configured, but cant create any more?
>
> #sh vtp status
> VTP Version capable : 1 to 3
> VTP version running : 1
> VTP Domain Name :
> VTP Pruning Mode : Disabled
> VTP Traps Generation : Disabled
> Device ID : 0024.c3f0.9100
> Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
>
>
> Feature VLAN:
> --------------
> VTP Operating Mode : Transparent
> Maximum VLANs supported locally : 255
> Number of existing VLANs : 220
>
>
> Try and create new vlan:
>
> (config)#vlan 300
> (config-vlan)#name test
> (config-vlan)#exi
> Proposed configuration exceeds the limit of 255 VLANs that can be supported on this platform. Reduce the number of VLANs proposed to be within this limit.APPLY VLAN changes failed.
>
> Anyone seen this before? (I've upgraded IOS to latest, but still have the issue?)
>
>
> _______________________________________________
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