VTPv1 and VTPv2 support VLAN from 1 to 1000, while VTPv3 supports VLAN 1 to 4096.
Extended-range VLANs are supported only in VTP version 3. If converting from VTP version 3 to VTP version 2, VLANs in the range 1006 to 4094 are removed from VTP control.
Currently, my switch is in VTP server mode and I am running VTP version 1. Now let’s create an extended VLAN 3012. Let’s check our VTP status once and then we will create the VLANs.
SWITCH-3750#sh vtp status VTP Version : running VTP1 (VTP2 capable) Configuration Revision : 17 Maximum VLANs supported locally : 1005 Number of existing VLANs : 2 VTP Operating Mode : Server VTP Domain Name : VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xF8 0x43 0xA4 0x71 0xA0 0x4F 0xAB 0xB0
As you can see above my vtp mode is server and now let’s create the VLAN.
SWITCH-3750(config)#vlan 3012 SWITCH-3750(config-vlan)#end % Failed to create VLANs 3012 Extended VLAN(s) not allowed in current VTP mode. %Failed to commit extended VLAN(s) changes.
As you can see above we are getting an error that Extended VLANs are not allowed in the current VTP mode. So if you want to create the extended VLAN then there is 2 solution, Either you have to change your VTP version to 3 or you can change your VTP mode to transparent.
Here, my switch capable is only capable of supporting version 2 so I will configure the VTP mode as transparent. Now, let’s change the VTP mode.
SWITCH-3750(config)#vtp mode transparent Setting device to VTP TRANSPARENT mode.
Now let’s create the VLAN and verify
SWITCH-3750(config)#vlan 3012 SWITCH-3750(config-vlan)#end
SWITCH-3750#show vlan VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Gi1/1 3012 3012 active Gi1/2