I believe only way to configure VTP domain is by CLI., Anyway i heard when we configure trunk from a switch A(which is in VTP domain (say cisco)) to another switch B which dont belong to any VTP domain., the second switch automatically assigned to switch A (VTP domain)., is that so ? i cant find anywhere this.,
This is correct!
When Cisco implemented VTP, they left a "null" value for exactly this reason. If a VTP client or server with a null domain receives a VTP message with the domain populated, it will assume the domain of the received message and add applicable VLANs to its database.
You can find more information here:
Its true. The 2nd switch will be assigned the domain from 1st switch.
A quick test to prove it.
Quick output: running-configs do not have the vtp configurations.
! Switch#show run Building configuration... . . . hostname Switch ! ! ! ! spanning-tree mode pvst ! interface FastEthernet0/1 ! . . . ! interface Vlan1 no ip address shutdown ! ! line con 0 ! line vty 0 4 login line vty 5 15 login ! ! end Switch#show vtp status VTP Version : 2 Configuration Revision : 0 Maximum VLANs supported locally : 255 Number of existing VLANs : 5 VTP Operating Mode : Server ***VTP Domain Name : HK*** VTP Pruning Mode : Disabled VTP V2 Mode : Disabled VTP Traps Generation : Disabled MD5 digest : 0xC2 0x79 0x35 0xAE 0x48 0x96 0xB9 0xE0 Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00 Local updater ID is 0.0.0.0 (no valid interface found) Switch#