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This chapter describes how to identify and resolve problems related to storm control. This chapter contains the following sections:
A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. You can use the traffic storm control feature to prevent disruptions from a broadcast, multicast, or unknown-unicast traffic storm.
Storm Control Troubleshooting Commands
Use the following commands to display detailed storm control statistics on an interface:
show storm-control statistics interface interface-type module-number/port-number
show storm-control statistics module module-number
|
Command |
Description |
|---|---|
|
vemcmd show storm stats |
Displays all statistics related to the broadcast, multicast, and unknown unicast traffic. |
|
vemcmd show storm-rate ltl ltl |
Displays the configured storm rate on a VEM. |
|
vemcmd show storm status |
Displays the storm control status of whether the port is dropping or allowing traffic on a VEM. |
To debug storm control on VEM, run the following commands:
| Step 1 |
vemlog clear |
| Step 2 |
vemlog start |
| Step 3 |
vemlog debug sfstormcontrol all |
| Step 4 |
vemlog show all |
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