[c-nsp] PAgP or LACP timers

[Arie Vayner (avayner)]

Ran,

I am not 100% sure this would help, but you may want to try and use UDLD
on the ports. The timer can be reduced down to 1 second.
I would recommend you run it in aggressive mode.

Take a look here:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12235se/scg/
swudld.htm 

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ran Liebermann
Sent: Tuesday, April 17, 2007 01:14 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] PAgP or LACP timers

Hi all,

I have a scenario in which there are two 3750 switches for the IBM blade
center.
I'd like to implement etherchannel between the switches so that 8 GE
ports will pass through 8 of the blade servers, while each blade is
acting as a bridge. So far so good.
Each of the blades is running an application, that when fails it also
disrupts the bridging capabilities of the server, therefore not allowing
frames from one side to the other.

Now, the thing is that whenever a blade server is inserted in the
chassis the ports on the switches become up, so in order to control
whether a port is a member of a channel-group I must deploy PAgP or
LACP.
However, the inherent timers of the protocols are somewhat slow, 30
seconds between keepalives, which is too long in order to detect a
failure.

My question is divided to two:
1. Is it possible to somehow change the timers of PAgP or LACP? (we
found an "lacp rate fast" command only on 6500).
2. Do you have a different suggestion for the above requirements?

Many thanks,
--
Ran.
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