RE: Etherchannel issue...

Hello Scott, thanks for the e-mail. Yes, you're right it's not admin down but
an Etherchannel error causing the links to be down. I did not do a CDP
discovery, which
I should have.

I have since reloaded the switches & used the PAgP on both SW - desirable &
auto - and is good. Ideally, I would have loved to fix the problem than
reloading it. I listened to your audio material last night - which cleared a
few doubts. Again, thank you.

---------------------------------------------------------
Regards,

Jit

-----Original Message-----
From: Scott Morris [mailto:smorris_at_internetworkexpert.com]
Sent: Wednesday, 13 May 2009 12:32 AM
To: Jitendra Anbu
Cc: CCIE R/S, Groupstudy
Subject: Re: Etherchannel issue...

While the other side is down, your output in another post didn't show admin
down, so they aren't shut.

Post the "show run int (intf)" from each side here.

Are you sure these interfaces are physically connected to one another?
Default the interfaces and do "show cdp nei" to verify basic functionality
before adding channel group.

Scott

Jitendra Anbu wrote:

Hi Gurus,

Can someone help me to understand the problem bellow;

I created an EC between 3550 & 3750 (ports 23-24. Both pots were shut before

configuring). The 3550 was created as mode: desirable and the 3750 as mode:

ON. (I am hoping this is ok - so far)

On the 3750 I see the following error.

SW2(config-if-range)#do sh int gi1/0/23

GigabitEthernet1/0/23 is down, line protocol is down (err-disabled)

Whats causing this err-disable state?

The log looks like this

*Mar 1 08:12:37.200: %PM-4-ERR_DISABLE: channel-misconfig error detected on

Gi1/0/23, putting Gi1/0/23 in err-disable state

*Mar 1 08:12:37.200: %PM-4-ERR_DISABLE: channel-misconfig error detected on

Gi1/0/24, putting Gi1/0/24 in err-disable state.

The 3550 say both ports are down.

Whats the way around this? I tried a few things.... Change both ends to
mode:

ON but same issue. Shut no shut same issues. Can anyone help?

Thanking you all in advance.

Jit

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Received on Wed May 13 2009 - 09:25:54 ART