Resuming Normal Forwarding On A Port - Cisco 2950 - Catalyst Switch Configuration Manual

Configuring Port Blocking
Beginning in privileged EXEC mode, follow these steps to disable the flooding of multicast and unicast
packets to an interface:
Command
Step 1 configure terminal
Step 2
interface interface-id
Step 3
switchport block multicast
Step 4 switchport block unicast
Step 5 end
Step 6
show interfaces interface-id switchport
Step 7
copy running-config startup-config
To return the interface to the default condition where no traffic is blocked, use the no switchport block
{multicast | unicast} interface configuration commands.
This example shows how to block unicast and multicast flooding on a port:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# switchport block multicast
Switch(config-if)# switchport block unicast
Switch(config-if)# end

Resuming Normal Forwarding on a Port

Beginning in privileged EXEC mode, follow these steps to resume normal forwarding on a port:
Command
Step 1 configure terminal
Step 2
interface interface-id
Step 3
no switchport block multicast
Step 4
no switchport block unicast
Step 5 end
Step 6
show interfaces interface-id switchport
Step 7
copy running-config startup-config
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
22-6
Purpose
Enter global configuration mode.
Specify the interface to configure and enter interface
configuration mode.
Block unknown multicast forwarding to the port.
Block unknown unicast forwarding to the port.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Specify the interface to configure and enter interface configuration
mode.
Enable unknown multicast flooding to the port.
Enable unknown unicast flooding to the port.
Return to privileged EXEC mode
Verify your entries.
(Optional) Save your entries in the configuration file.
Chapter 22 Configuring Port-Based Traffic Control
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