how to block a device which is generating traffic?

[srinuamujuri27]

HI,

In my lan infrastrucure one device (laptop having null mac address) is generating unnecessary traffic, switches broadcasting this traffic to every port.

remaining users getting 100% receive throughput in their laptops. so they are not able to access network.

any one please help me how to block this traffic in switch.

Thanks 

[Collin Clark]

shut the port down with "shutdown" command 

[srinuamujuri27]

thanks for your response.

if i shut the port what if that person connects to another port. I want the solution to block broadcast  traffic from that device which can connect any where in my lan segment.

[Collin Clark]

You can configure broadcast storm control-

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_22ea/SCG/scg/swtrafc.html#wp1229854

[srinuamujuri27]

I tried broadcast storm control but no use problem still persist.

I applied

storm-control broadcast level 1

on all the ports.

[Suresh Vinayagam Subramanian]

Hi Sri,

Span that port and see what kind of traffic you are receiving from that laptop . Also check if  that mac address keep changing or stays same mac address every time.

Analysis the span traffic will give more details about the problem .

HTH
Regards,
VS.Suresh.
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