Cisco WS-C2960S-24PD-L Software Guide - Page 204
Enabling a Network Port, Disabling a Network Port
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Configuring Flooding Controls Chapter 7 Configuring the Switch Ports Step 5 Step 6 Command end show port block {multicast | unicast} interface Purpose Return to privileged EXEC mode Verify your entries, entering the appropriate command once for the multicast option and once for the unicast option. Enabling a Network Port Network ports are assigned per VLAN and can reduce flooded traffic on your network. The switch forwards all traffic with unknown destination addresses to the network port instead of flooding the traffic to all ports in the VLAN. When you configure a port as the network port, the switch deletes all associated addresses from the address table and disables learning on the port. If you configure other ports in the VLAN as secure ports, the addresses on those ports are not aged. If you move a network port to a VLAN without a network port, it becomes the network port for the new VLAN. You cannot change the settings for unicast and multicast flooding on a network port. You can assign only one network port per VLAN. For the restrictions that apply to a network port, see the "Assigning Passwords and Privilege Levels" section on page 6-11. Caution A network port cannot link cluster members. Beginning in privileged EXEC mode, follow these steps to define a network port: Step 1 Step 2 Step 3 Step 4 Step 5 Command configure terminal interface interface port network end show running-config Purpose Enter global configuration mode. Enter interface configuration mode, and enter the port to be configured. Define the port as the network port. Return to privileged EXEC mode. Verify your entry. Disabling a Network Port Beginning in privileged EXEC mode, follow these steps to disable a network port: Step 1 Step 2 Step 3 Step 4 Step 5 Command configure terminal interface interface no port network end show running-config Purpose Enter global configuration mode. Enter interface configuration mode, and enter the port to be configured. Disable the port as the network port. Return to privileged EXEC mode. Verify your entry. Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide 7-6 78-6511-08