I got a problem using VTP version 3.
I have 3 Cisco switches:
- WS-C3750X-48T-S (c3750e-universalk9-mz.122-53.SE2.bin)
- WS-C2960-8TC-L (c2960-lanbasek9-mz.122-58.SE2.bin)
- Cisco 3560G (c3560-ipservicesk9-mz.122-58.SE2.bin)
Before I had older versions of IOS, but I updated them, because devices did not support VTP version 3.
Moreover, I have checked compatibility of these switches and IOS with the named above technology via Cisco Feature Navigator.
When I am trying to create vlan on VTP version 3 mode, I get the message shown below:
VTP VLAN configuration not allowed when device is not the primary server for vlan database.
I know from Cisco documentations that in order to be able to create vlans, switch should be int the primary server mode.
However, vtp primary-server [vlan | mst] [force] command does not works:
domain Set the name of the VTP administrative domain.
file Configure IFS filesystem file where VTP configuration is stored.
interface Configure interface as the preferred source for the VTP IP updater address.
mode Configure VTP device mode
password Set the password for the VTP administrative domain
pruning Set the administrative domain to permit pruning
version Set the administrative domain to VTP version
Moreover, when working swithces use VTP version 3, already existing VLANs do not update, VTP advertisements dropped or do not propagate at all.
I do not know what to do with this issue.
Is it possible that vtp primary and secondary server modes only work on Cisco 4500 and 6500 switches?
Why do I faced these problems? I could not find the answer from the forums and Cisco papers.
Devices were tested on laboratory conditions, but I work for a big company and we need to use VLAN numbers which are greater that 1000.
Therefore, it is really important for me to implement VTP version 3.
Is there any probability of the network outage, when we will migrate from VTP version 2 to 3?
Thanks in advance.