Configure ARP Cache Entries

Chapter 3: IP Routing Configuration Guide

•802.3 SNAP: SNAP IEEE 802.3 encapsulation, in which the type code becomes the frame length for the IEEE 802.2 LLC encapsulation (destination and source Service Access Points, and a control byte)

To configure IP encapsulation, enter one of the following commands in Configure mode.

Configure Ethernet II	interface	create	ip		<InterfaceName> output-mac-
encapsulation.	encapsulation			ethernet_II

Configure 802.3	interface	create	ip		<InterfaceName> output-mac-
SNAP encapsulation.	encapsulation			ethernet_snap

Configure Address Resolution Protocol

The SSR allows you to configure Address Resolution Protocol (ARP) table entries and parameters. ARP is used to associate IP addresses with media or MAC addresses. Taking an IP address as input, ARP determines the associated MAC address. Once a media or MAC address is determined, the IP address/media address association is stored in an ARP cache for rapid retrieval. Then the IP datagram is encapsulated in a link-layer frame and sent over the network.

You can add and delete entries in the ARP cache. To add or delete static ARP entries, enter one of the the following commands in Configure mode:

Add a static ARP entry.	arp	add <host> mac-addr<MAC-addr>
		exit-port <port>

Clear a static ARP entry.	arp	clear <host>

Configure Proxy ARP

The SSR can be configured for proxy ARP. The SSR uses proxy ARP (as defined in RFC 1027) to help hosts with no knowledge of routing determine the MAC address of hosts on other networks or subnets. Through Proxy ARP, the SSR will respond to ARP requests from a host with a ARP reply packet containing the SSR MAC address. Proxy ARP is enabled by default on the SSR.

To disable proxy ARP, enter the following command in Configure mode:

Disable Proxy ARP on an interface.

ip disable-proxy-arp interface <InterfaceName>all

48	SmartSwitch Router User Reference Manual

9032578-02 specifications

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Cabletron Systems 9032578-02 Configure Address Resolution Protocol, Configure ARP Cache Entries

Models: 9032578-02

Configure Address Resolution Protocol