Configuring Small-Frame Arrival Rate - Cisco ME 3400 Software Configuration Manual
Ethernet access switch
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- Command reference manual (950 pages) ,
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- Getting started manual (33 pages)
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Chapter 22
Configuring Port-Based Traffic Control
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 gigabitethernet0/1
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 gigabitethernet0/1
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. 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.)
Beginning in privileged EXEC mode, follow these steps to configure the threshold level for each
interface:
Command
Step 1
configure terminal
Step 2
errdisable detect cause small-frame
Step 3
errdisable recovery interval interval
Step 4
errdisable recovery cause small-frame
Step 5
interface interface-id
Step 6
small violation-rate pps
Step 7
end
Step 8
show interfaces interface-id
Step 9
copy running-config startup-config
OL-9639-07
Purpose
Enter global configuration mode.
Enable the small-frame rate-arrival feature on the switch.
(Optional) Specify the time to recover from the specified
error-disabled state.
(Optional) Configure the recovery time for error-disabled ports to
be automatically re-enabled after they are error disabled by the
arrival of small frames
Enter interface configuration mode, and specify the interface to be
configured.
Configure the threshold rate for the interface to drop incoming
packets and error disable the port. The range is 1 to 10,000 packets
per second (pps)
Return to privileged EXEC mode.
Verify the configuration.
(Optional) Save your entries in the configuration file.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
Configuring Storm Control
22-5
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Troubleshooting
