Configuring Layer 3 Protocol Filtering On A Layer 2 Lan Interface; Verifying Layer 3 Protocol Filtering Configuration - Cisco 6500 Series Software Configuration Manual

Chapter 27 Configuring Layer 3 Protocol Filtering on Supervisor Engine 1
This example shows how to enable Layer 3 protocol filtering globally:
Router# configure terminal
Router(config)# protocol-filtering

Configuring Layer 3 Protocol Filtering on a Layer 2 LAN Interface

To configure Layer 3 protocol filtering on a Layer 2 LAN port, perform this task:
Command
Step 1
Router(config)# interface {{type
{port-channel number}}
Step 2
Router(config-if)# switchport protocol {appletalk
| ip | ipx | group} {on | off | auto}
Router(config-if)# no switchport protocol
{appletalk | ip | ipx | group}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
This example shows how to configure the protocol membership of Fast Ethernet port 5/8 to allow IPX
packets only, and verify the configuration:
Router(config)# interface fastethernet 5/8
Router(config-if)# switchport protocol appletalk off
Router(config-if)# switchport protocol ip off
Router(config-if)# switchport protocol ipx on

Verifying Layer 3 Protocol Filtering Configuration

To verify Layer 3 protocol filtering configuration, perform this task:
Command
Router# show protocol-filtering interface
1
{{type slot/port} | {port-channel number}}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
This example shows how to verify the Layer 3 protocol filtering configuration of Fast Ethernet port 5/8:
Router# show protocol-filtering interface fastethernet 5/8
Interface
--------------------------------------------------------------------------
Fa5/8
Router#
The show protocol filtering command shows only ports that have at least one protocol set to the
Note
nondefault configuration.
78-14099-04
1
slot/port} |
Purpose
Verifies the interface filtering configuration.
IP Mode IPX Mode
OFF ON
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
Configuring Layer 3 Protocol Filtering
Purpose
Selects the interface to configure.
Configures Layer 3 protocol filtering on the LAN port.
Clears Layer 3 protocol filtering configuration on the
LAN port.
Group Mode
OFF
Other Mode
OFF
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