From: Charles Henson (chenson@gmail.com)
Date: Thu Oct 23 2008 - 15:22:37 ARST
it also depends on the server vendor and teaming method used. Dell is
different than HP etc. Some "teaming" methods are active/passive while
others are truly a single logical interface. Make sure you understand
what the server is attempting to do.
On 10/22/08, Joseph Brunner <joe@affirmedsystems.com> wrote:
> 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
>
> Internal Virus Database is out-of-date.
> Checked by AVG.
> Version: 7.5.524 / Virus Database: 270.6.13/1642 - Release Date: 29/08/2008
> 18:12
>
>
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