I have a problem with my 3925 router, when I remove a vlan from my trunk port (this is also the port used for my SSH connection to my router), I lose my SSH connection and I can not even ping my router.
Can you explain me why?
I have already restarted my router via my console port and the VLAN I removed was just a test created to analyze this problem.
I created the vlan and added it to my trunk port and removed it immediately, which caused the loss of SSH connection and forced me to restart the router via the console port.
The VLAN I removed is not my MGMT VLAN and this is why I don't understand the loss of my SSH connection or the unsuccessfuly PING.
Which command do you use for finish this task?
switchport trunk allowed vlan xyz
switchport trunk allowed vlan add xyz
switchport trunk allowed vlan remove xyz
Could you clarify it for us?
I agree with @Jaderson Pessoa that we need more information. We need to know what was the original configuration for the vlans and the trunk. And we need to know what commands the original poster used to remove the vlan. Also the original poster says something about adding a vlan to investigate a problem. Perhaps it would help if we knew what problem was being investigated.