Thanks peter and jurgen sharing valued information . i am also trying to find-out this host.
--- On Wed, 6/1/11, Jurgen Marenda <[email protected]> wrote: From: Jurgen Marenda <[email protected]> Subject: RE: [c-nsp] Problem VLAN Flapping between trunk port To: "'Peter Rathlev'" <[email protected]>, "'Md. Jahangir Hossain'" <[email protected]> Cc: [email protected] Date: Wednesday, June 1, 2011, 12:10 AM 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? _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
