Dear Giuseppe,

It's already there.

How to identify which PC / Device is creating this broadcast?

Regards,

Dear Giuseppe,
It's already there.
How to identify which PC / Device is creating this broadcast?
Regards,

Hi,

In order to see which host is genrating for that you need to have tools like sinffer pro which will give GUI mode for the whole LAN traffic and which host is genrating a Boardcast or multicast or any other sporious traffic inside the LAN by spamming the whole vlan traffic to a PC in which tool is installed.

and if you have configure broadcast strom on ports then by the following commands you can see the discard packets in thos interface in the switch from that you can see which host is connected to that particular ports where you are getting heavy packets are getting discarded.

Switch# show interfaces [{type1 slot/port} | {port-channel number}] counters broadcast

Switch# show interfaces [{type1 slot/port} | {port-channel number}] counters multicast

Switch# show interfaces [{type1 slot/port} | {port-channel number}] counters unicast

There is a single counter for all suppressed traffic. These commands all display the same discard count, which shows the total number of packets discarded for all three traffic storm control modes, on all interfaces or on the specified interface.

Hope to Help !!

Ganesh.H

Dear all,

What should be the uper limit and lower limit

for broadcast strom control .....?

regards,

Dear all,
What should be the uper limit and lower limit
for broadcast strom control .....?
regards,

Hi,

On each interface, a maximum threshold can be configured in bits or packets per second, or as a percentage of the interface bandwidth. If incoming traffic of the specified type exceeds its threshold during a polling interval (one second), traffic is blocked until the incoming rate drops below the configured falling interval.

Switch(config-if)# storm-control broadcast level bps 1m 500k

In the above command, we have configured storm control for broadcast traffic with a 1 Mbps rising threshold and a 500 Kbps falling threshold. Note that specifying a falling threshold is optional; if omitted, the falling threshold will default to the value of the rising threshold (effectively removing it).

show storm-control displays interfaces configured with storm control and the state of each:

Hope to help !!

Remember to rate the helpful post

Ganesh.H

Dear all,

I have checked using sniffer but broadcast sent is normal 0.21 %  .

Than What could be the reason?

ls help.

Regards,

Dear All,

I have checked everything but yet I am facing the problem.

I m\am clearing more by providing topology info and sh cmd info. for  your refference.

I have a doubt of broadcast but using sniffer I have not found any broadcast. It's only 0.21%.

one more thing the port on which broadcast storm control is applied is 1 Gbps and storm control thresold is 10 i.e. 10% =====> 100 Mbps. So broadcast more than 100 Mbps will be filtered. M I right ? ??????????????????????

Should we keem thresold level lower or say 1%?

Please suggest.

Regards,