Re: MST Configuration Question

The more correct, I guess, is that that you understand why you do it.
Instance 0 will cause any instability to be replicated everywhere, as
part of the CIST. I don't know why someone would want to have any
non-used vlans there. But there is where they go if not assigned
elsewhere...

VLANs should not pop into activity by themselves though :)

-Carlos
P.S.
Cross posting is not a nice thing to do according to many.

chuck mcfadden @ 16/10/2012 14:29 -0300 dixit:
> I have set up a lab to test migratation from PVST to MST. The lab will use
> VLAN 1-1005; private VLANs are not used. For the first test phase, all
> active VLANs will be placed in Instance 1 (no load balancing).
>
> I have read some conflicting information on best practice for configuring
> MST and I'm hoping someone can offer their opinion:
>
> One method says to configure "as few VLANs as possible" in Instance 0 and
> as many as requird in the remaining Instances. For Example:
>
> spanning-tree mode mst
> spanning-tree configuration
> name Cisco
> version 10
> instance 1 vlan 1-4094
> spanning-tree mst 0-1 priority 24576
> (MST0 - no vlan; MST1 - vlan 1-4094)
>
>
> The other method says to put only the used VLANs in Instance 1-64, leaving
> the non-used VLANs in Instance 0. For Example:
>
> spanning-tree mode mst
> spanning-tree configuration
> name Cisco
> version 10
> instance 1 vlan 1-1005
> spanning-tree mst 0-1 priority 24576
> (MST0 - 1006-4094; MST1 - vlan 1-1005)
>
>
> Which configuration would be "more correct"? Does anyone have a good link
> where I can get more information?
>
> Thanks,
> Chuck
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net