Re: STP root bridge question?

Since bridge priority is the only thing taken into account when
deciding who will become root that you can manipulate, you have very
few options. Other than that, ensure it has the lowest MAC address ;-)

You can make others become roots by using "macro" command "span vlan
1-4094 root", but under the hood that also changes the priority. Or
you could disable STP on Cat2 by doing "no span vlan 1-4094" (this is
asking for trouble).

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
Mailto: markom_at_ipexpert.com
Telephone: +1.810.326.1444
Fax: +1.810.454.0130
Web: http://www.ipexpert.com/
On Mon, Mar 15, 2010 at 22:13, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:
> Hello,
>
> if you have topology like this:
>
> sw1-----sw2
> B | B \ B  B  B / |
> B | B  B \ B / B  |
> B | B  B / B \ B  |
> 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? B STP used is RPVST.
>
> Regards
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net