Cisco WS-C6506

35-3
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 35 Configuring Broadcast Suppression
Configuring Broadcast Suppression on the Switch
Configuring Broadcast Suppression on the Switch
These sections describe how to configure broadcast suppression on the Catalyst 6500 series switches:
• Enabling Broadcast Suppression, page 35-3
• Disabling Broadcast Suppression, page 35-5
• Enabling the errdisable State, page 35-5
Note The switch supports multicast and unicast traffic storm control on Gigabit and 10 Gigabit Ethernet LAN
ports. Most FastEthernet switching modules do not support multicast and unicast traffic storm control,
with the exception of WS-X6148A-RJ-45 and the WS-X6148-SFP.
Enabling Broadcast Suppression
To enable broadcast suppression for one or more ports, perform this task in privileged mode:
Note Although you can specify the broadcast suppression threshold to 0.01 percent, not all modules adjust to
that level of precision. Most thresholds vary between 0.01 percent and 0.05 percent. If you specify a finer
threshold, the threshold percent adjusts as closely as possible.
Note On these modules, a level value of 0.33 percent or less suppresses all traffic:
—WS-X6704-10GE
—WS-X6748-SFP
—WS-X6724-SFP
—WS-X6748-GE-TX
This example shows how to enable bandwidth-based broadcast suppression and verify the configuration:
Console> (enable) set port broadcast 3/1-6 75.25%
Ports 3/1-6 broadcast traffic limited to 75.25%.
On broadcast suppression ports 3/1-6 are configured to drop-packets.
Console> (enable) show port broadcast 3
Port Broadcast-Limit Multicast Unicast Total-Drop Action
-------- --------------- --------- ------- -------------------- ------------
3/1 75.25 % - - 0 drop-packets
3/2 75.25 % - - 0 drop-packets
3/3 75.25 % - - 2 drop-packets
3/4 75.25 % - - 0 drop-packets
3/5 75.25 % - - 0 drop-packets
Task Command
Step 1
Enable the broadcast suppression threshold for
one or more ports as a percentage of the total
bandwidth.
set port broadcast mod/port threshold%
[violation {drop-packets | errdisable}]
[multicast {enable | disable}]
[unicast {enable | disable}]
Step 2
Verify the broadcast suppression configuration. show port broadcast [mod[/port]]