Configuring Broadcast Suppression On The Switch; Enabling Broadcast Suppression - Cisco WS-C6506 Software Manual

Chapter 35 Configuring Broadcast Suppression

Configuring Broadcast Suppression on the Switch

These sections describe how to configure broadcast suppression on the Catalyst 6500 series switches:
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•
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The switch supports multicast and unicast traffic storm control on Gigabit and 10 Gigabit Ethernet LAN
Note
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:
Task
Step 1 Enable the broadcast suppression threshold for
one or more ports as a percentage of the total
bandwidth.
Step 2 Verify the broadcast suppression configuration.
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.
On these modules, a level value of 0.33 percent or less suppresses all traffic:
Note
—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
-------- --------------- --------- ------- -------------------- ------------
3/1
3/2
3/3
3/4
3/5
OL-8978-04
Enabling Broadcast Suppression, page 35-3
Disabling Broadcast Suppression, page 35-5
Enabling the errdisable State, page 35-5
Broadcast-Limit Multicast Unicast Total-Drop
75.25 %
75.25 %
75.25 %
75.25 %
75.25 %
Command
set port broadcast mod/port threshold%
[violation {drop-packets | errdisable}]
[multicast {enable | disable}]
[unicast {enable | disable}]
show port broadcast [mod[/port]]
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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring Broadcast Suppression on the Switch
Action
0 drop-packets
0 drop-packets
2 drop-packets
0 drop-packets
0 drop-packets
35-3