From: Moses Polalysa (mpurple7@yahoo.com)
Date: Mon Mar 24 2008 - 22:44:52 ART
Hi teammate,
Thanks for the responds, now it's clear. :)
Yes, there's a loop since I do all the 3 port-channels (to other 3 switches) in 1 switch first before I move to other switches.
The solution is: I creating one by one (from this side and then go to other side directly connected and back over and over again though all switches).
After creating port-channel in one side, go quick creating port-channel to other side or you will get MACFlap notification like previous I post.
Hmm.. a little bit not efficient that Cisco had made time but it's fine since we're already know the solution. Thank you very much for the responds. I appreciate.
Regards,
Moses
----- Original Message ----
From: Patrick Galligan <pgalligan@gmail.com>
To: Moses Polalysa <mpurple7@yahoo.com>
Sent: Tuesday, March 25, 2008 8:03:27 AM
Subject: Re: Weird problem: MAC Flapping
You are getting a loop, because one end has the port channel set and
the other does not. If you force the ports to be an etherchannel you
should fix it (channel-group 1 mode on). If you need to allow it to
negotiate because of the task requirements, you'll have to work out
why the negotiation is failing.
To check the etherchannel status on each switch: show ether summ
If you are doing this through a dot1q tunnel, you need to enable LACP
through an L2 protocol tunnel as well. I think the command is:
l2protocol-tunnel lacp
HTH
Cheers,
Patrick
On Tue, Mar 25, 2008 at 10:23 AM, Moses Polalysa <mpurple7@yahoo.com> wrote:
> Hi expert,
>
> I have a weird problem. I'm trying to create port-channel to to all directly 4 switches, when I add the ports into port-channel suddenly there is an error like this.
>
> 01:50:14: %SW_MATM-4-MACFLAP_NOTIF: Host 0030.9432.a420 in vlan 15 is flapping between port Fa0/24 and port Fa0/23
>
> Anyone can explain? What should I do? I tried many ways to creating the port-channel but the output is still same.
>
> Thanks in advance.
>
>
> Regards,
> Moses
>
>
>
>
>
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