STP root bridge question?

Hello,

if you have topology like this:

sw1-----sw2
  | \ / |
  | \ / |
  | / \ |
sw3------sw4

all trunks between switches are etherchannel. Let say you don't want
that SW2 becomes root for any VLAN. How can you accomplish that
without changing priority on any of switches? STP used is RPVST.

Regards

Blogs and organic groups at http://www.ccie.net
Received on Mon Mar 15 2010 - 23:13:57 ART