Re: rapid-pvst vs mst in recalculation of spanning tree

Well, you are essentially adding a port into the STP processes running for
each VLAN you add to the trunk. In RSTP a "change" is indicated by a port
going up so I would think that it will reconverge for just the VLANs you are
adding. MST uses RSTP internally, so I would not think there would be a
difference there. I would expect it would converge for any MST instance
that has a VLAN you added as a member of it.

On Fri, Dec 4, 2009 at 1:33 AM, Mad_Prof Mad_Prof <dr3d3m3nt0_at_gmail.com>wrote:

> Hello All,
>
>
> I am trying to find out if STP is recalculated for all vlans in the
> process of adding a trunk to a switch:
>
> interface Port-channel17
> switchport trunk encapsulation dot1q
> switchport trunk allowed vlan 13,17-32,56,87
> switchport mode trunk
> spanning-tree guard root
>
>
> and would a difference whether the switch is in rapid-pvst or mst ?
>
> Any assistance is greatly appreciated.
>
>
>
>
> It is said that if you know your enemies and know yourself, you will not be
> imperiled in a hundred battles; if you do not know your enemies but do know
> yourself, you will win one and lose one; if you do not know your enemies
> nor
> yourself, you will be imperiled in every single battle.
>
>
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