Configuring proxy ARP

To configure proxy ARP, you can configure:

• A prefix list in the config>router>policy-options>prefix-list context.

• A route policy statement in the config>router>policy-options>policy-statement context and apply the specified prefix list.

  • In the policy statement entry>to context, specify the host source address(es) for which ARP requests can or cannot be forwarded to non-local networks, depending on the specified action.

  • In the policy statement entry>from context, specify network prefixes that ARP requests to be forwarded or not forwarded depending on the action if a match is found. For more information about route policies, see the 7450 ESS, 7750 SR, 7950 XRS, and VSR Unicast Routing Protocols Guide.

• Apply the policy statement to the proxy-arp configuration in the config>router>interface context.

- config>router# policy-options
    - begin
    - commit
    - prefix-list name
        - prefix ip-prefix/mask [exact | longer | through length | prefix-length-range length1-length2]

To configure the policy statement specified in the proxy-arp-policy policy-statement command:

- config>router# policy-options
    - begin
    - commit
    - policy-statement name
        - default-action {accept | next-entry | next-policy | reject}
        - entry entry-id
            - action {accept | next-entry | next-policy | drop | reject} 
            - to
                - prefix-list name [name]
            - from
                - prefix-list name [name]

The following example shows the prefix list and policy statement configuration:

A:ALA-49>config>router>policy-options# info
----------------------------------------------
            prefix-list "prefixlist1"
                    prefix 10.20.30.0/24 through 32
            exit
            prefix-list "prefixlist2"
                    prefix 10.10.10.0/24 through 32
            exit
...
            policy-statement "ProxyARPpolicy"
                entry 10
                    from
                        prefix-list "prefixlist1"
                    exit
                    to
                        prefix-list "prefixlist2"
                    exit
                    action reject
                exit
                default-action accept
                exit
            exit
...
----------------------------------------------
A:ALA-49>config>router>policy-options# 

Use the following CLI to configure proxy ARP:

- config>router>interface interface-name
    - local-proxy-arp
    - proxy-arp-policy policy-name [policy-name]
    - remote-proxy-arp

The following example shows a proxy ARP configuration:

A:ALA-49>config>router>if# info
----------------------------------------------
            address 192.0.2.59/24
            local-proxy-arp
            proxy-arp
                policy-statement "ProxyARPpolicy"
            exit
----------------------------------------------
A:ALA-49>config>router>if#