Verifying Configuration - Cisco Catalyst 2000 Configuration Handbook

170 Cisco LAN Switching Configuration Handbook

Verifying Configuration

After you configure broadcast suppression, use the following commands to verify the
configuration and operation on the switch:
(privileged) show interfaces
(privileged) show interfaces
(privileged) show interfaces counters storm-control [module slot_number]
Feature Example
For a 6500, this example shows how to enable one-quarter-percent broadcast suppression
on interface FastEthernet 3/1 and verify the configuration: When enabling broadcast sup-
pression, you can specify the threshold in hundredths of a percent:
■ Enter 0.00 to suppress all broadcasts.
Enter 0.01 for 0.01% (1/100th percent).
■
Enter 0.50 for 0.50% (one-half percent).
■
■ Enter 1 or 1.00 for 1% (one percent).
The threshold range is 0.00–100.00.
6500# configure terminal
6500(config)# interface fastethernet 3/1
6500(config-if)# broadcast suppression 0.25
6500(config-if)# end
6500# show running-config interface fastethernet 3/1 | include suppression
broadcast suppression 0.25
Router# copy running-config startup-config
11-2: Protocol Filtering
Protocol filtering can be configured on Catalyst 4500 and 6500 series switches.
■
Protocol filtering does not require any special feature cards on the switch to operate.
■
Protocol filtering enables you to configure a port to filter or block flood (broadcast,
■
multicasts, and unknown unicasts) traffic based on protocols.
■ Protocol filtering is supported only on Layer 2 access ports and cannot be config-
ured on trunk links or Layer 3 ports.
Protocol filtering supports blocking of IP, IPX, AppleTalk, VINES, and DECnet traf-
■
fic. All other protocols are not affected by protocol filtering.
Administrative protocols such as Spanning Tree Protocol (STP), Cisco Discovery
■
Protocol (CDP), and VLAN Trunking Protocol (VTP) are not blocked by protocol
filtering.
switchport
counters storm-control