Enabling A Network Port; Disabling A Network Port - Cisco WS-C2955T-12 Software Manual

Configuring Flooding Controls
Command
Step 5 end
Step 6
show port block {multicast |
unicast} interface

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
Passwords and Privilege Levels" section on page
Caution A network port cannot link cluster members.
Beginning in privileged EXEC mode, follow these steps to define a network port:
Command
Step 1
configure terminal
Step 2
interface interface
Step 3 port network
Step 4 end
Step 5 show running-config

Disabling a Network Port

Beginning in privileged EXEC mode, follow these steps to disable a network port:
Command
Step 1
configure terminal
Step 2 interface interface
Step 3
no port network
Step 4
end
Step 5
show running-config
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
7-6
Purpose
Return to privileged EXEC mode
Verify your entries, entering the appropriate command once for the
multicast option and once for the unicast option.
6-11.
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.
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.
Chapter 7 Configuring the Switch Ports
"Assigning
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