Hi, I have two switches one is 3750G and another is 2960G interconnected through 2 etherchannels. C3750G is configured in VTP Server Mode and 2960 is configured in VTP Client mode, Now I would like to add a new vlan in the Network, I am able to configure in 3750 as its in Server and cannot in 2960 as it is in Client mode. So to configure the vlan in 2960 can I change the VTP mode from clinet to Transparent and configure the vlan then again change to transparent to client mode. is there any risk to change the vtp/vlan database or any configuration? Please anyone suggest me.
If you create the layer 2 vlan in the 3750 which is the server then it should show in the 2960 with the "show vlan command . This is different than if it is allowed across a trunk .If you have manually pruned your connecting links then on both sides on your connecting link interfaces you would have to add "switchport trunk allowed vlan add XX ,where XX is the new vlan you created on the vtp server. To check to see if vtp itself is working correctly then on both switches issue the "show vtp status" command and look at the config revision number they should be exactly the same , if not then vtp is not working or configured correctly.
Check in 2960G side if you can able to see already existing Vlans created in 3750G .This will ensure that etherchannel is working between 2 switches and If you can't see any Vlan's in 2960G side, check ether channel config between 2 switches and VTP server name configured (case sensitive) in client side.
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