From: Jason Madsen (madsen.jason@gmail.com)
Date: Thu Jan 15 2009 - 01:50:54 ARST
exactly like Jonathan stated. it depends on which switch is the root for
the particular vlan(s). if you're only using the 2 switches, then pick one
as root, set your port-priority on that device or use cost on the other.
either use port-priority "upstream" or use cost "downstream".
Jason
On Wed, Jan 14, 2009 at 8:45 PM, Raghav Bhargava <raghavbhargava12@gmail.com
> wrote:
> well here's the topology:-
>
> SW1 <---> SW2
>
> the trunks are on port 19,20 and we are using dot1q with MST. Vlans
> 1,2,3 are configured on both of them.
> Now I want interface 19 to carry vlans 1,2 and interface 20 to carry vlan
> 3.
>
> So my question is again do i need to configure the spanning-tree mst 1
> port-priority on both the switches or just one will work.
>
> thanks
> /raghav
>
> On Wed, Jan 14, 2009 at 7:42 PM, Jonathan Greenwood II
> <gwood83@gmail.com> wrote:
> > It depends on which switch is the (root) for the particular instance in
> > question and what are you trying to manipulate far as which ports are
> > forwarding and blocking. I would spend sometime reviewing STP because
> the
> > concept doesn't change whether your using STP/MSTP/RSTP on modifying
> > port-priority or cost.
> >
> > HTH
> >
> > Jonathan
> >
> > On Wed, Jan 14, 2009 at 7:28 PM, Jason Madsen <madsen.jason@gmail.com>
> > wrote:
> >>
> >> configure spanning-tree (MST or any other...) on the "upstream" device.
> >>
> >> Jason
> >>
> >> On Wed, Jan 14, 2009 at 7:39 PM, Raghav Bhargava
> >> <raghavbhargava12@gmail.com
> >> > wrote:
> >>
> >> > Hi Experts,
> >> >
> >> > When configuring port priority for specific instances in MST between 2
> >> > Switches which have a dot1q trunk between them .
> >> > Do we need to configure the command spanning-tree mst 1 port-priority
> >> > x on both the switches or just 1 will work??
> >> >
> >> > --
> >> > Warm Regards
> >> > Raghav
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> _______________________________________________________________________
> >> > Subscription information may be found at:
> >> > http://www.groupstudy.com/list/CCIELab.html
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
> >> http://www.groupstudy.com/list/CCIELab.html
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
>
>
>
> --
> Warm Regards
> Raghav
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sun Mar 01 2009 - 09:43:38 ARST