[c-nsp] Possible spanning tree issue

[Michael Sprouffske]

The new switch was setup transparent.  I don't see any topology changes in the network.  I can understand adding the new switch and have the network re converge.  The weird part is powering down a switch that does not touch the phone system taking it down is weird.



________________________________
 From: Jeff Kell <jeff-kell at utc.edu>
To: Michael Sprouffske <msprouffske at yahoo.com>; "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net> 
Sent: Tuesday, June 4, 2013 4:04 PM
Subject: Re: [c-nsp] Possible spanning tree issue
 

On 6/4/2013 6:56 PM, Michael Sprouffske wrote:
> I attached a new switch to the network and it took down our contact center that doesn't touch this switch nor does the phone system.  Is this spanning tree doing this?  I don't see anything in the logs that show a change in spanning tree.
>
> I also had an employee unplug a switch by accident and it took down our contact center.  This switch is all by itself and does not directly touch the phone system nor is it in the path of the phone system.  I feel like this shouldn't have happened.  

A new switch running VTP server mode, can wipe everything on your
network in the right circumstances (configured with matching vtp domain
name, and having a higher revision than the existing network).

Not sure about the switch removal, unless it was a VTP master :)

Jeff