Resuming Normal Forwarding On A Port; Enabling A Network Port - Cisco WS-C2950-24 Configuration Manual

Chapter 7 Configuring the Switch Ports

Resuming Normal Forwarding on a Port

Command
Step 1 configure terminal
Step 2
interface interface
Step 3
no port block multicast
Step 4 no port block unicast
Step 5
end
Step 6
show port block {multicast |
unicast} interface

Enabling a Network Port

Caution
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Beginning in privileged EXEC mode, follow these steps to resume normal
forwarding on a port:
Purpose
Enter global configuration mode.
Enter interface configuration mode, and enter the port to
configure.
Enable unknown multicast forwarding to the port.
Enable unknown unicast flooding to the port.
Return to privileged EXEC mode
Verify your entries, entering the appropriate command
once for the multicast option and once for the unicast
option.
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
A network port cannot link cluster members.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
Configuring Flooding Controls
"Changing the Password" section on page 6-15.
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