VTP deep understanding

[NKANJean75976]

Hi guys, 

I'm used to VTP configuration. But I never understood what does the following line highlight means when issuing the "show vtp status".

And I've noticed that It only appears on the vtp server.

 Switch#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 2
VTP Domain Name : cisco
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : 0cf3.1992.8000
Configuration last modified by 0.0.0.0 at 5-9-21 01:21:20
Local updater ID is 0.0.0.0 (no valid interface found)

Any explanation that could help me understand that will be helpful. 

Thank you in advance.

Jean

[paul driver · Accepted solution]

Hello
Switches will use the lowest ip address assigned to the switch as their source ip for vtp mesages, if the switch doesnt have any ip address it will show what your are seeing.

You can manually set this address.

int loopback 1
ip address x.x.x.x y.y.y.y
exit
vtp interface loopback 1 only

[NKANJean75976]

Thank you Paul !

I understand now.