From: Joseph Brunner (joe@affirmedsystems.com)
Date: Thu Oct 23 2008 - 02:25:15 ARST
Hello,
This MAC_FLAP_NOTIF message indicates a mac learning loop. This will happen
when STP has failed to block port, etc.
In your case I suspect you need to connect the server to 2-4 ports on the
SAME CATALYST and HARD CODE the channel settings, not most servers use LACP
Do not connect the server to two catalyst in teaming mode "load balancing"
only do this in mode "failover". Our your bound to have loop issues!
i.e.
int ra g0/1-2
channel-group 12 mode on
channel-protocol lacp
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Kelvin Yeo
Sent: Thursday, October 23, 2008 12:03 AM
To: 'Cisco certification'
Subject: Server Teaming on Catalyst
Guys,
A server with teaming setup and uplink to my 2 core switch is receiving MAC
address flapping on the switch. It reported similar MAC learned from 2
ports. I believe this is fine since frames destined to the server will still
reach it. It there a proper feature I can use to fine-tune this scenario?
And disabled this flapping loggings..
Rdgs,
Yeo
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Version: 7.5.524 / Virus Database: 270.6.13/1642 - Release Date: 29/08/2008
18:12
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