I have multiple switches connected by trunks, most on the same vtp domain.
SW1(config)#vtp version 3 *Mar 1 .908: %SW_VLAN-6-OLD_CONFIG_FILE_READ: Old version 2 VLAN configuration file detected and read OK. Let's stop here and talk about a huge problem with previous versions of VTP.
As a network consultant, I always recommend - especially prior to version 3 - that customers use VTP mode transparent.
- VTP can now be turned off completely, as opposed to just transparent mode - Support for hidden passwords My lab is two 3560s running 15.0(2)SE6, and one 3550 running 12.x code.
The 3560s support VTP v3, the 3550 I'm just using to show backwards compatibility to v2.
During the early days of networking, it was difficult to implement VLANs across networks.
Each VLAN was manually configured on each network switch.
I think that I’ve mentioned before that I’ve never used VTP in a production environment before.
I’ve used VTP domain names to identify sites for Cisco Works, but all of our switches are set to VTP transparent mode.
That’s a time consuming task so there is something to help us called VTP (VLAN Trunking Protocol).