806
Configuring IP Unicast Routing
Configuring IP Addressing
DETAILED STEPS
To disable an encapsulation type, use the no arp arpa or no arp snap interface configuration command.
EXAMPLE
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface gi0/2
Switch(config-if)# arp arpa
Switch(config-if)# end
Enabling Proxy ARP
By default, the switch uses proxy ARP to help hosts learn MAC addresses of hosts on other networks or subnets. Follow
these steps to enable proxy ARP if it has been disabled.
BEFORE YOU BEGIN
Review the Configuring Address Resolution Methods, page 803.
DETAILED STEPS
To disable proxy ARP on the interface, use the no ip proxy-arp interface configuration command.
Command Purpose
1. configure terminal Enter global configuration mode.
2. interface interface-id Enter interface configuration mode, and specify the
Layer 3 interface to configure.
3. no shutdown Enable the interface if necessary. By default, UNIs
and ENIs are disabled and NNIs are enabled.
4. arp {arpa | snap} Specify the ARP encapsulation method:
arpa—Address Resolution Protocol
snap—Subnetwork Address Protocol
5. end Return to privileged EXEC mode.
6. show interfaces [interface-id] Verify ARP encapsulation configuration on all
interfaces or the specified interface.
7. copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
1. configure terminal Enter global configuration mode.
2. interface interface-id Enter interface configuration mode, and specify the
Layer 3 interface to configure.
3. no shutdown Enable the interface if necessary. By default, UNIs and
ENIs are disabled and NNIs are enabled.
4. ip proxy-arp Enable proxy ARP on the interface.
5. end Return to privileged EXEC mode.
6. show ip interface [interface-id] Verify the configuration on the interface or all interfaces.
7. copy running-config startup-config (Optional) Save your entries in the configuration file.
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