Moving Away from VTP

Do you have too many VLANs? Are your Cisco 2950s running out of memory? You need to move away from VTP.

To find whether you’re currently using VTP:

Switch# sh vtp status
VTP Version                     : running VTP2
Configuration Revision          : 219
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 126
VTP Operating Mode              : Client
VTP Domain Name                 : MyDomain
VTP Pruning Mode                : Enabled
VTP V2 Mode                     : Enabled
VTP Traps Generation            : Enabled
MD5 digest                      : 0x19 0xE4 0x9A 0x38 0xA8 0x45 0x8D 0x67
Configuration last modified by 170.17.132.1 at 3-4-10 21:05:06
Switch#

If your operating mode is either Client or Server, you’re using VTP. To disable VTP:

Switch# conf t
Switch(config)# vtp mode transparent
Switch(config)# end
Switch# sh vtp status
VTP Version                     : 2
Configuration Revision          : 219
Maximum VLANs supported locally : 1005
Number of existing VLANs        : 126
VTP Operating Mode              : Transparent
VTP Domain Name                 : MyDomain
VTP Pruning Mode                : Enabled
VTP V2 Mode                     : Enabled
VTP Traps Generation            : Disabled
MD5 digest                      : 0xB6 0x90 0x70 0xAE 0x1D 0x2C 0x5F 0xE1
Configuration last modified by 10.8.0.18 at 2-8-10 19:36:45
Switch#

Now you can delete vlans:

Switch# conf t
Switch(config)# no vlan 2

And watch your memory consumption drop!

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