Re: Spanning-tree

Then, root-guard will not do for at least two things:
-It is not configured in "the switch", but on neighbours
-It will not prevent "the switch" from becoming root. In fact, there
will be more than one root :)

-Carlos

dls152_at_cox.net @ 19/01/2011 21:32 -0300 dixit:
> The requirement is to configure the switch not to be able to become root.
>
>
> ---- Shane K <shanekgs_at_gmail.com> wrote:
>> Another vote for rootguard.
>>
>> The "spanning-tree vlan root primary" command be considered setting
>> the priority depending on the requirements.
>>
>> S
>> Sent from my iPhone
>>
>> On 19 Jan 2011, at 22:31, Aaron <aaron1_at_gvtc.com> wrote:
>>
>>> wonder if this is what we could do, determine which switch has
>>> highest Mac address, then call that switch "switch 1" then I guess
>>> you could leave all switches at default prio 32768 and Mac would
>>> dictate who wins... And that highest numbered one (switch 1) would
>>> never win
>>>
>>> Aaron
>>>
>>> On Jan 19, 2011, at 1:33 PM, <dls152_at_cox.net> wrote:
>>>
>>>> I have four switches trunked together and wanted to know how to
>>>> keep switch 1 from every becoming root without using the priority
>>>> command. I hope this helps.
>>>>
>>>>
>>>> ---- "Haas wrote:
>>>>> Yes, but effectively it would prevent the other switch from
>>>>> seizing root bridge. I think that is what he was looking for...
>>>>> Otherwise maybe
>>>>>
>>>>> spanning-tree vlan x-y root primary !
>>>>>
>>>>> priority command is not used there either.
>>>>>
>>>>> I guess it depends on the point of view of which switch you are
>>>>> configuring... and what order they are patched in to each other,
>>>>> etc... rootguard seems the simplest solution.
>>>>>
>>>>> Maybe dsl152 can fill us in on more specifics...
>>>>> -Brad
>>>>>
>>>>> -----Original Message-----
>>>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
>>>>> Behalf Of aaron1_at_gvtc.com
>>>>> Sent: Tuesday, January 18, 2011 2:47 PM
>>>>> To: Haas, Brad
>>>>> Cc: ccielab_at_groupstudy.com; Ronnie Angello; dls152_at_cox.net
>>>>> Subject: Re: Spanning-tree
>>>>>
>>>>> wouldn't rootguard cause the switch that rootguard is config'd on
>>>>> to then partition (isolate) that switch that is attempting to
>>>>> become root? is that what you (dsl152) were trying to
>>>>> accomplish? block/shutdown that switch that is attempting to
>>>>> become root?
>>>>>
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Brad Haas" <bradh_at_presidio.com>
>>>>> To: "Ronnie Angello" <ronnie.angello_at_gmail.com>, dls152_at_cox.net
>>>>> Cc: ccielab_at_groupstudy.com
>>>>> Sent: Tuesday, January 18, 2011 11:36:17 AM
>>>>> Subject: RE: Spanning-tree
>>>>>
>>>>> I second that... rootguard
>>>>>
>>>>> _______________________________________________________________________________
>>
>>
>>>>> Bradford Haas | Unified Communications Architect | CCIE 17887,
>>>>> CCVP, CCDP, MCSE | Northeast | Presidio Networked Solutions
>>>>> 10 Sixth Road, Woburn MA 01801 | bhaas_at_presidio.com
>>>>> D: 781.638.2258 | C: 781-223-1867 | www.presidio.com
>>>>> Fax: 781.970-1458
>>>>>
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
>>>>> Behalf Of Ronnie Angello
>>>>> Sent: Tuesday, January 18, 2011 11:30 AM
>>>>> To: dls152_at_cox.net
>>>>> Cc: ccielab_at_groupstudy.com
>>>>> Subject: Re: Spanning-tree
>>>>>
>>>>> Root Guard???
>>>>>
>>>>> On Tue, Jan 18, 2011 at 11:07 AM, <dls152_at_cox.net> wrote:
>>>>>
>>>>>> Can someone tell me how to prevent switch from becoming root
>>>>>> without
>>>>>> using priority command?
>>>>>>
>>>>>> Thanks!
>>>>>>
>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> Ronald Angello
>>>>> Senior Network Architect
>>>>> CCIE 17846
>>>>> CCDP, CCIP, CCNP
>>>>>
>>>>>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net