topic Re: Host Flapping in Switching

Host Flapping

vinothlb1 — Wed, 06 Mar 2019 08:00:52 GMT

I m getting following error in my L# switch. How to rectify the problem.. which leads my network slow..

%C4K_EBM-4-HOSTFLAPPING: Host 02:01:00:00:00:00 in vlan 1 is flapping between port Gi5/2 and port Gi 4/22

Re: Host Flapping

n.nandrekar — Sun, 06 Jul 2008 17:09:35 GMT

Hi!

this could mean that the same host mac address frames are being recieved on both the interfaces, pointing to a probable loop in the network.

Regards,

niranjan

Re: Host Flapping

vinothlb1 — Mon, 07 Jul 2008 13:18:41 GMT

How to rectify the problem...

Re: Host Flapping

n.nandrekar — Mon, 07 Jul 2008 13:28:45 GMT

what is the topology connected to both the posts? are those 2 ports indirectly connected through hub/switch?

Re: Host Flapping

Pravin Phadte — Mon, 07 Jul 2008 13:33:06 GMT

Hi,

Plz let us know what is connected to this switch ports.

also the running confg for both would be helpful.

regards,

pravin

Re: Host Flapping

cowetacoit — Mon, 07 Jul 2008 16:42:47 GMT

I had a similar problem once. It was a couple servers that had Teamed NIC's. It wasn't configured properly on the broadcom software. If your network is slow it sounds like it could be a network loop.

Re: Host Flapping

Pravin Phadte — Mon, 07 Jul 2008 16:47:34 GMT

It can also be possible if the servers connected to the switch ports are set for load balancing.

Regards,

Pravin

Re: Host Flapping

vinothlb1 — Tue, 08 Jul 2008 03:18:18 GMT

Both gigabit ports are connected to L3 switch.

Gi/7 connected to my antivirus server. Gi/14 connected to fileserver.. .There is no load balance..