Re: STP root bridge question?

Ignore my last post. My mistake. I think that's it. Disabling STP on switch SW2.
The problem now is that SW3 isn't using direct link to new root SW4.
Instead, it goes through SW2....

On Mon, Mar 15, 2010 at 11:37 PM, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:
> 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
>>>>
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
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Received on Mon Mar 15 2010 - 23:42:31 ART