Re: STP Root

From: CCIE To Be (ccie.tobe81@gmail.com)
Date: Sat Jan 10 2009 - 16:03:16 ARST


Hi,

If I am getting this right , you are saying that we should NOT include
default vlan if task is asking for specific vlans being used in topology. If
task is asking in general ( ALL VLANs ) then we should include default vlan
??

On Sat, Jan 10, 2009 at 7:36 PM, Anthony Sequeira <
asequeira@internetworkexpert.com> wrote:

> This is an area where I believe we tend to think too much. I can remember
> being freaked out about the Default VLANs in a question like this and what
> to do about them. The proctor at RTP let me know at the time that I was just
> worrying too darn much.
>
> If I am asked to make the switch the root for the odd numbered VLANs - I
> include ALL odd numbered VLANs (except the default VLANs) and I move on. I
> suppose it would be a bit trickier if it was specified to do this for all
> VLANs used in your particular Lab paper. Now I am implementing the command
> just for the VLANs we use and I am being sure to catch any that might be
> created outside of the Switching section.
>
> Anthony J. Sequeira, CCIE #15626, CCSI #23251
> Senior CCIE Instructor
>
> asequeira@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
>
>
> On Jan 10, 2009, at 5:31 AM, CCIE To Be wrote:
>
> Dear Group,
>>
>> If I have a requirement to make one switch e.g SwitchA 'root' for odd
>> vlans
>> and other switch SwitchB 'root' for even switch. My question is that, do I
>> need to INCLUDE VLAN 1 in the odd vlan list while making a switch primary
>> for odd vlans ??
>>
>> If we talk about 'allowed vlan' on trunk then it is clear that we don't
>> need
>> to INCLUDE VLAN 1 in allowed vlan list because its a system vlan and STP,
>> VTP etc traffic will be passed across the trunks even VLAN 1 is not
>> implicitly included in allowed vlan list. What about above scenario ?
>>
>>
>> Thanks
>>
>>
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