Configuring Small-Frame Arrival Rate - Cisco Catalyst 2975 Software Configuration Manual

Chapter 23 Configuring Port-Based Traffic Control
Command
Step 6
show storm-control [interface-id]
[broadcast | multicast | unicast]
Step 7
copy running-config startup-config
To disable storm control, use the no storm-control {broadcast | multicast | unicast} level interface
configuration command.
This example shows how to enable unicast storm control on a port with an 87-percent rising suppression
level and a 65-percent falling suppression level:
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# storm-control unicast level 87 65
This example shows how to enable broadcast address storm control on a port to a level of 20 percent.
When the broadcast traffic exceeds the configured level of 20 percent of the total available bandwidth
of the port within the traffic-storm-control interval, the switch drops all broadcast traffic until the end
of the traffic-storm-control interval:
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# storm-control broadcast level 20

Configuring Small-Frame Arrival Rate

Incoming VLAN-tagged packets smaller than 67 bytes are considered small frames. They are forwarded
by the switch, but they do not cause the switch storm-control counters to increment. In Cisco IOS
Release 12.2(44)SE and later, you can configure a port to be error disabled if small frames arrive at a
specified rate (threshold).
You globally enable the small-frame arrival feature on the switch and then configure the small-frame
threshold for packets on each interface. Packets smaller than the minimum size and arriving at a
specified rate (the threshold) are dropped since the port is error disabled.
If the errdisable recovery cause small-frame global configuration command is entered, the port is
re-enabled after a specified time. (You specify the recovery time by using errdisable recovery global
configuration command.)
OL-19720-02
Purpose
Verify the storm control suppression levels set on the interface for the
specified traffic type. If you do not enter a traffic type, broadcast storm
control settings are displayed.
(Optional) Save your entries in the configuration file.
Catalyst 2975 Switch Software Configuration Guide
Configuring Storm Control
23-5