From: Cielieska Nathan (ncielieska@gmail.com)
Date: Sun Jan 13 2008 - 02:49:16 ARST
I would highly recommend against this in a production environment but
maybe a forward delay/maxage timer reduce?
So By default on failure the switch has to wait 20 seconds for max
age and 15 seconds for forward delay on listening/learning for a
total of 50 seconds. Uplink fast cuts it by 30 seconds making it 20
seconds to converge.
Do this on a root bridge or a potential root bridge for your two
vlans (the values are carried down by BPDU's):
spanning-tree vlan 1 max-age 10
spanning-tree vlan 1 forward-delay 7
Something like this would give you 10 + 7 + 7 = 24. 24 seconds might
be acceptable
etc. etc..
Its a fine line though.. some STP internal processes depend on these
values to be close to a certain range of time. Only your requirements
would dictate how low/high you can set these.
I would verify it is configured on all switches
On Jan 11, 2008, at 8:23 AM, Mark N wrote:
> Folks, I have a tough one I need some help with:
>
> Lets say you have an access switch that connects to two core
> switches. You would like to maximize failover time for two vlans
> and ONLY two vlans. Since uplinkfast is global and effects all
> vlans, what is a viable solution?
>
>
> Thanks,
>
> Mark
>
>
>
>
> ---------------------------------
> Looking for last minute shopping deals? Find them fast with Yahoo!
> Search.
>
> ______________________________________________________________________
> _
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Feb 01 2008 - 10:37:59 ARST