Quick Reference Guide

390 | ACL Commands
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storm-control broadcast
This command enables broadcast storm recovery mode. If the mode is enabled, broadcast storm
recovery with high and low thresholds is implemented.
Syntax
[no] storm-control broadcast
The no version of this command disables broadcast storm recovery mode.
The threshold implementation follows a percentage pattern. If the broadcast traffic on any Ethernet
port exceeds the high threshold percentage (as represented in the Table 21-27) of the link speed, the
switch discards the broadcast’s traffic until the traffic returns to the low threshold percentage or less.
The full implementation is depicted in the table below.
Default
disabled
Mode
Global Config
Related
Commands
storm-control flowcontrol
This command enables 802.3x flow control for the switch.
Syntax
[no] storm-control flowcontrol
The no version of this command disables 802.3x flow control for the switch.
Default
disabled
Mode
Global Config
Table 21-27. Broadcast Storm Recovery Thresholds
Link Speed High Low
10M 20 10
100M 5 2
1000M 5 2
show storm-control Shows the storm control configuration.
show interface ethernet
The report generated by the
show interface ethernet command
contains broadcast storm statistics.
Note: This command only applies to full-duplex mode ports.
Note: 802.3x flow control works by pausing a port when the port becomes
oversubscribed and dropping all traffic for small bursts of time during the congestion
condition. This can lead to high-priority and/or network control traffic loss.