[c-nsp] VLAN disappeared

[David Prall]

Vincent,
A number of the smaller switches have a 64 VLAN limit. What switch are you
using. On the trunk ports you might want to look at pruning all vlans except
those that you require.

2900XL
http://www.cisco.com/en/US/products/hw/switches/ps607/products_installation_
and_configuration_guide_chapter09186a008007d32c.html
"A switch supports up to 64 VLANs"

David

--
David C Prall dcp at dcptech.com http://dcp.dcptech.com
  

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of 
> Vincent De Keyzer
> Sent: Thursday, September 22, 2005 8:40 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] VLAN disappeared
> 
> Hello,
> 
>  
> 
> a VLAN disappeared from a switch this morning (obviously creating
> "side-problems").
> 
>  
> 
> When I realised this and tried to put it back, here is what 
> the switch told
> me:
> 
>  
> 
> BRUBLUsw04#vlan database
> 
> BRUBLUsw04(vlan)#vlan 828
> 
> VLAN 828 added:
> 
>     Name: VLAN0828
> 
> BRUBLUsw04(vlan)#exit
> 
> Proposed configuration has too many VLANs for this device's 
> core memory
> 
> resources.  Either reduce the number of VLANs proposed or use 
> another VTP
> 
> device to configure database.  (The latter will cause this 
> device to enter
> 
> TRANSPARENT mode automatically if propagated to it.)
> 
> APPLY failed.
> 
> Use 'abort' command to exit
> 
> BRUBLUsw04(vlan)#
> 
>  
> 
> So I looked up the VLAN, and found 204 that was not supposed 
> to be there:
> 
>  
> 
> BRUBLUsw04(vlan)#no vlan 204
> 
> Deleting VLAN 204...
> 
> BRUBLUsw04(vlan)#vlan 828 name BRUBLU
> 
> VLAN 828 modified:
> 
>     Name: BRUBLU
> 
> BRUBLUsw04(vlan)#exit
> 
> APPLY completed.
> 
> Exiting....
> 
> BRUBLUsw04#
> 
>  
> 
> and everybody was happy again.
> 
>  
> 
> Now, being infamously incompetent in layer2 switches (among 
> other things), I
> have the following questions: 
> 
> What happened? Why did VLAN 828 suddenly disappear? If I turn 
> this switch
> into a VTP client, and add VLANs on a VTP server, will this 
> one be able to
> swallow all VLANs of the domain (at the moment, all switches 
> in the VTP
> domain are servers)? Why would I want to have this switch 
> VTP-transparent?
> How do I check the "core memory resources" consumption? etc.
> 
>  
> 
> . in other words: please advise.
> 
>  
> 
> Thanks in advance.
> 
>  
> 
> Vincent
> 
>  
> 
>  
> 
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