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New Member

I am getting HOSTFLAPPING error

18:27:43: %C4K_EBM-4-HOSTFLAPPING: Host 02:01:00:00:00:00 in vlan 1 is flapping

between port Te5/2 and port Te5/1

kindly provide the solution ASAP.

Please help

2 REPLIES
Bronze

Re: I am getting HOSTFLAPPING error

Cisco's Output Interpreter gives this:

%C4K_EBM-4-HOSTFLAPPING (x1):Host [mac-addr] in vlan [dec] is flapping between

port [char] and port [char]

Explanation: The specified host is detected as a source address on multiple ports.

Typically, a host is supposed to be learned on only one port. A spanning tree

loop is the most common cause of this condition. All traffic from the specified

host is temporarily dropped. After 15 seconds, forwarding is reenabled. If the

problem persists, the traffic from the problem host continues to be dropped indefinitely.

Recommended Action: Make sure that spanning tree is enabled to prevent spanning

tree loops. If you have spanning tree disabled, make sure that you have no spanning

tree loops in your network.

New Member

Re: I am getting HOSTFLAPPING error

Hi,

If i am right you are doing some Microsoft Network Load Balancing and it is connected to the port Te5/2 and port Te5/1 ,it seems there is some Teaming issue with the Server ,get it checked from the server team .

Chao

Vishwa

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