Default Protected Port Configuration; Protected Port Configuration Guidelines; Configuring A Protected Port; Configuring Port Blocking - Cisco 3020 - Catalyst Blade Switch Configuration Manual

Configuring Port Blocking

Default Protected Port Configuration

The default is to have no protected ports defined.

Protected Port Configuration Guidelines

You can configure protected ports on a physical interface (for example, Gigabit Ethernet port 1) or an
EtherChannel group (for example, port-channel 5). When you enable protected ports for a port channel,
it is enabled for all ports in the port-channel group.

Configuring a Protected Port

Beginning in privileged EXEC mode, follow these steps to define a port as a protected port:
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3 switchport protected
Step 4
end
Step 5 show interfaces interface-id switchport
Step 6 copy running-config startup-config
To disable protected port, use the no switchport protected interface configuration command.
This example shows how to configure a port as a protected port:
Switch# configure terminal
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# switchport protected
Switch(config-if)# end
Configuring Port Blocking
By default, the switch floods packets with unknown destination MAC addresses out of all ports. If
unknown unicast and multicast traffic is forwarded to a protected port, there could be security issues. To
prevent unknown unicast or multicast traffic from being forwarded from one port to another, you can
block a port (protected or nonprotected) from flooding unknown unicast or multicast packets to other
ports.
These sections contain this configuration information:
•
•
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
19-6
Default Port Blocking Configuration, page 19-7
Blocking Flooded Traffic on an Interface, page 19-7
Chapter 19
Purpose
Enter global configuration mode.
Specify the interface to be configured, and enter interface
configuration mode.
Configure the interface to be a protected port.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Configuring Port-Based Traffic Control
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