[c-nsp] Problem VLAN Flapping between trunk port

[Jurgen Marenda]

Also make sure your virtual mashines 
do not have the same MAC Adresses.

Juergen.

> On Tue, 2011-05-31 at 22:11 -0700, Md. Jahangir Hossain wrote:
> ...
> > *Mar  1 12:43:54: %SW_MATM-4-MACFLAP_NOTIF: Host 0018.d17b.96d7 in
> > vlan 104 is flapping between port Gi1/0/28 and port Gi1/0/27
> 
> What's behind these ports?
> 
> The switch is complaining that the MAC address keeps moving. 
> It could be
> a loop, but most often (in my experience) it's "misconfigured" hosts,
> e.g. a host with dual NICs that's using some kind of load-sharing
> between ports. I also seem to remember seeing it when IP phones roam
> between wireless access points.
> 
> >From the port configuration it must be something you trust 
> not to bridge
> itself. A VMware server maybe?