From: Nadeem Ansari (nadeem.ansari574@gmail.com)
Date: Tue Mar 17 2009 - 08:37:44 ART
This is not normal it may be due to any convergance taking place in switch
topology and responsible protocol is STP.
Need to check STP topology changes wether is there any blocked port transit
in to forwarding state for matter of time
Regards
Nadeem
On Tue, Mar 17, 2009 at 4:50 PM, Antonio Soares <amsoares@netcabo.pt> wrote:
> I don't think this is normal. These type of messages are usually associated
> with a STP loop. Disable the redundant links in your
> Port-Channel and see what happens. But first check the cpu occupation on
> both switches: show proc cpu | ex 0.00.
>
>
> Regards,
>
> Antonio Soares, CCIE #18473 (R&S)
> amsoares@netcabo.pt
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> joe_astorino@comcast.net
> Sent: segunda-feira, 16 de Margo de 2009 18:59
> To: CCIE, R/S OSL; CCIE R/S, Groupstudy
> Subject: Fallback Bridging Console Message: Is This Normal?
>
> I have 2 switches trunked together in this lab scenario. The scenario
> instructs me to do fallback bridging for VLANs 999 and 1000.
> On SW 1 I configured an SVI for each vlan, and configured the fallback
> bridging. On the first switch, I now continually get the
> below output: Note, the switches are linked via po12 port-channel. My first
> thought is that this is absolutely normal because the
> VLANs are bridged, but I wanted to make sure. It definitely is an annoyance
> when trying to finish the rest of the lab (I always turn
> on "logging con deb" so I can see everything necessary in the lab)
>
>
> 6d16h: %SW_MATM-4-MACFLAP_NOTIF: Host 000b.46e2.6997 in bridge group 1 is
> flapping between port Po12 (Vl1000) and port Po12 (Vl999)
> Cat1#
> 6d16h: %SW_MATM-4-MACFLAP_NOTIF: Host 000b.46e2.6997 in bridge group 1 is
> flapping between port Po12 (Vl999) and port Po12 (Vl1000)
>
>
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