Security
Storm Control
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4 351
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• Shutdown on Storm—Select to shutdown a port when a storm occurs on the port. If
this is not selected extra traffic is discarded.
Broadcast Storm Control
• Storm Control State—Select to enable Storm Control for Broadcast packets.
• Rate Threshold—Enter the maximum rate at which unknown packets can be
forwarded. This value can be entered by Kbits/sec or By percentage of the total
available bandwidth.
• Trap on Storm—Select to send a trap when a storm occurs on a port. If this is not
selected, the trap is not sent.
• Shutdown on Storm—Select to shutdown a port when a storm occurs on the port. If
this is not selected extra traffic is discarded.
STEP 4 Click Apply. Storm control is modified, and the Running Configuration file is updated.
Storm Control Statistics
To view Storm Control statistics:
STEP 1 Click Security > Storm Control > Storm Control Statistics.
STEP 2 Select an interface.
STEP 3 Enter the Refresh Rate—Select the how often the statistics should be refreshed. The available
options are:
• No Refresh—Statistics are not refreshed.
• 15 Sec—Statistics are refreshed every 15 seconds.
• 30 Sec—Statistics are refreshed every 30 seconds.
• 60 Sec—Statistics are refreshed every 60 seconds.
The following statistics are displayed for Unknown Unicast, Multicast and Broadcast storm
control:
• Multicast Traffic Type—(Only for Multicast traffic) Registered or Unregistered.
• Bytes Passed—Number of bytes received.
• Bytes Dropped—Number of bytes dropped because of storm control.
• Last Drop Time—Time that the last byte was dropped.
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