From: shiran guez (shiranp3@gmail.com)
Date: Sun Dec 09 2007 - 12:45:33 ART
I think still uplinkfast, it doesn't say in your case to not disable the fwd
delay for other vlan.
it is a little confusing and make you think may be there is something you
missing here but I think that other then uplinkfast there is no more
suitable answer for this.
On Dec 9, 2007 5:00 PM, Rajat Chauhan <rachauha@cisco.com> wrote:
> Pardon me, its "decrease" and not "disable" in the first line.
>
> rajat
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Rajat Chauhan
> Sent: Sunday, December 09, 2007 8:28 PM
> To: ccielab@groupstudy.com; cisco@groupstudy.com
> Subject: Q.Uplinkfast on two vlans
>
> Hi Experts,
>
>
>
> If the question asks to disable the forwarding delay in case of uplink
> failure for 2 vlans, we use uplinkfast for that. However, uplinkfast is
> enabled globally and for all vlans. So please suggest the best option:
>
>
>
> 1. Enable uplinkfast globally, ignoring the fact that the question
> asks
> for 2 vlans.
>
>
>
> 2. Make priority for other vlans 0 so that this switch becomes the
> root
> for them and uplnkfast can run for the only remaining 2 vlans. But again,
> that's wrong cos some where it may be most likely mentioned to make
> specific
> switches as root.
>
>
>
> 3. Disable stp for other vlan (except these two), again seems a
> drastic
> one, considering we have 3 trunks carrying these vlans
>
>
>
> 4. Manually increase vlan priority to 49152 and port cost to 3000 for
> these 2 vlans, but that doesn't takes care of the multicast frame that
> switch sends to age out (rather change) the CAM entries to point to
> correct
> uplink switch.
>
>
>
> Please suggest.
>
>
>
> Thanks
>
>
>
> Rajat Chauhan
>
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-- Shiran Guez MCSE CCNP NCE1 http://cciep3.blogspot.com http://www.linkedin.com/in/cciep3
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