Hello Jeff:

-----Original Message-----
From: [EMAIL PROTECTED] on behalf of Jeff Kell
Sent: Fri 10/5/2007 10:05 AM
To: [email protected]
Subject: [c-nsp] Splitting VTP domain without a meltdown
 
I'm trying to split a branch building off of the main campus VTP domain and not 
having much success.

Currently we have one VTP domain that propagates over the main campus.  The 
goal is to split this into several independent domains to reduce the vlan count 
and move to L3 distribution, and make the L3 uplink point a VTP server for the 
new domain.

In a testbed case, I could remove a switch from the domain.  The vlan 
configuration remained "frozen" and things kept working OK.

In the production case, when I change the VTP domain, the trunks drop back to 
vlan1 only and things go to hell :-)

Is there a "non-invasive" way to break a building off of a VTP domain without 
visiting each wiring closet and manually configuring things for the new domain? 
 Surely there is a "non-forklift" approach to accomplish this task.

Thanks in advance,

Jeff
_______________________________________________

I'm assuming the switch you want to pull out of the domain is a CLIENT to a 
server somewhere.  In that case, I would recommend announcing a maintenance 
window, disconnect the switch from the network, flip the VTP to either 
TRANSPARENT or whatever new domain you want to use, then cut-and-copy in your 
VLAN list via a console connection.  The only time I've ever seen a 
non-invasive technique work is on old Cat OS switches.  All of the IOS switches 
seem to have issues with this event, so I've found it easier in the long run to 
just take the hit and do it in one shot.

Regards,

Mike
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