RE: address flapping

also you might want to check if any of those 2 interfaces are flapping their
layer 2 link, or if they are presenting duplex or speed mismatches, cause that
could be causing your flap assuming one of them is an alternate path to get to
that mac.
as Shashid said, I agree that it looks to me like an STP or SLB issue.

HTH

Fed.

> Date: Mon, 5 Apr 2010 22:06:45 +0300
> Subject: Re: address flapping
> From: shahid1357_at_gmail.com
> To: faizankhurshid921_at_hotmail.com
> CC: ccielab_at_groupstudy.com
>
> Hi Faizan ,
>
> This is abnormal behavior
>
> 1) are you using server loadbalancer ?Two NIC card in one server which r
> cnnected to two different swtches
> 2)check spanning-tree ?
> seems to be flapping of mac or hardware defect
>
> thanks
>
>
>
>
> On Mon, Apr 5, 2010 at 8:41 PM, faizan khurshid <
> faizankhurshid921_at_hotmail.com> wrote:
>
> > HEY
> >
> > Expert i need your help. CAt OS 4500 version 6.3 using as a Core
.fiber
> > connectivty established between access Swicthes
> >
> >
> > Vlan 1 is running across all network
> >
> > CAT OS 4500 servers and users are connected on it
> >
> >
> > access switches are 2950 where only user are connected
> >
> > Due to following are the error netwrok outages occuring
> >
> >
> > %SYS-4-pb-WARN:1/Host 00:0b:db:c2:18:53 is flapping between 3/1 and 4/7
> >
> > %SYS-4-pb-WARN:1/Host 00:0a:b7:e7:6d:80 is flapping between 2/1 and 4/8
> >
> > 3/1 and 2/1 are trunk port of Cat OS connected to access swicthes 01
and
> > 03
> > respectivley
> >
> > here is the link of network diagram
> >
> > http://img263.yfrog.com/i/oupn.jpg/
> >
> >
> >
> >
> >
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Received on Mon Apr 05 2010 - 22:29:50 ART