VTP version 3 - must enable vtp primary

[marco-giraldo]

Hi

I set core switch as VTP server.

Error: VTP VLAN configuration not allowed when device is not the primary server for vlan database.

VTP STATUS:

VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : tre02-IT
VTP Pruning Mode : Disabled (Operationally Disabled)
VTP Traps Generation : Disabled
Device ID : d085.43df.7e00

Feature VLAN:
--------------
VTP Operating Mode : Server
Number of existing VLANs : 12
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 1024
Configuration Revision : 0
Primary ID : 0000.0000.0000
Primary Description :
MD5 digest :

Feature MST:
--------------
VTP Operating Mode : Transparent

Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent

Every reboot i must put command "vtp primary" in enable mode otherwhise i can't have new VLANs.

Is it correct action?

[Giuseppe Larosa · Accepted solution]

Hello @marco-giraldo ,

>> Every reboot i must put command "vtp primary" in enable mode otherwhise i can't have new VLANs.

yes this is correct not being the command a configuration command it is not saved in the config file.

It is an operational state.

see for example:

https://community.cisco.com/t5/switching/changing-vtp-primary-server/m-p/5162440

Hope to help

Giuseppe

[Cristian Matei · Accepted solution]

Hi,

   Yes, this is by design, for which reason the command to promote a VTP server from secondary to primary is an EXEC level command which cannot survive a reboot as it's not saved in the VLAN configuration file. Upon reboot, a switch running VTP version 3 will start as VTP secondary and needs to be manually promoted to VTP primary in order for VLAN database changes to be allowed.

https://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3.2_0_se/multibook/configuration_guide/b_consolidated_config_guide_3850_chapter_0100000.html#ID94

Thanks,

Cristian.

[marco-giraldo]

Thank you guys about info

Marco