Re: STP root bridge question?

But, when I disable STP on SW2, SW1 is now see SW4 as root, and SW3
still see SW2 as root?

On Mon, Mar 15, 2010 at 11:27 PM, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:
> Well, let say that macro is out of the question. Is there a way to
> change switch's MAC address? The one that is shown by show version? If
> not, than disabling STP is probably solution?
>
> On Mon, Mar 15, 2010 at 11:20 PM, Marko Milivojevic <markom_at_ipexpert.com> wrote:
>> 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
>>> | \ / |
>>> | \ / |
>>> | / \ |
>>> 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
>>>
>>>
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Received on Mon Mar 15 2010 - 23:37:08 ART