[nsp] etherchannel link down time detection

[Wojtek Zlobicki]

Turn on portfast .  Just make sure you test thoroughly, I have found one
version of CatOS where portfact and Etherchannel don't mix.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Don Bowman
Sent: Wednesday, December 10, 2003 8:16 PM
To: cisco-nsp at puck.nether.net
Subject: [nsp] etherchannel link down time detection



i have an application where two catalyst 6509
are connected via an etherchannel of 2 ports.
On each link in this etherchannel is a hub
(a different hub on each) to facilitate packet
snooping.

The problem is, that if one of the wires
from one of the cat6k fails, that link of
the etherchannel takes a long time to determine
its down, since the link state doesn't change.

 |----|        |----|
 |    |---[]---|    |
 |    |        |    |
 |    |---[]---|    |
 ------        ------

I thought that i could solve this with UDLD,
but it doesn't seem to affect it.

Does anyone have a suggestion on how to 
make the convergence time of a link failure in
this mode be the same as if the hub were not there?

--don
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