Accton Technology ES4710BD manual Ip proxy-arp, Show arp, Command ip proxy-arp no ip proxy-arp

ES4710BD 10 Slots L2/L3/L4 Chassis Switch

17.3.2.2.2ip proxy-arp

Command: ip proxy-arp no ip proxy-arp

Function: Enables proxy ARP for VLAN interface; the “no ip proxy-arp” command disables proxy ARP.

Default: Proxy ARP is disabled by default.

Command mode: VLAN Interface Mode

Usage Guide: When an ARP request is received on the layer 3 interface, requesting an IP address in the same IP segment of the interface but not the same physical network, and the proxy ARP interface has been enabled, the interface will reply to the ARP with its own MAC address and forward the actual packets received. Enabling this function allows machines to physically be separated but in the same IP segment and communicate via the proxy ARP interface as if in the same physical network. Proxy ARP will check the route table to determine whether the destination network is reachable before responding to the ARP request; ARP request will only be responded if the destination is reachable. Note: the ARP request matching default route will not use proxy.

Example: Enabling proxy ARP for VLAN 1. Switch(Config-If-Vlan1)#ip proxy-arp

17.3.3 ARP Forwarding Troubleshooting Help

17.3.3.1Monitor and Debug Commands

17.3.3.1.1show arp

Command: show arp [<ip-addr>][<vlan-id>][<hw-addr>][type {staticdynamic}][count] }

Function: Displays the ARP table.

Parameters: <ip-addr>is a specified IP address; <vlan-id>stands for the entry for the identifier of specified VLAN; <hw-addr>for entry of specified MAC address; “static” for static ARP entry; “dynamic” for dynamic ARP entry; “count” displays number of ARP entries.

Command mode: Admin Mode

Usage Guide: Displays the content of current ARP table such as IP address, MAC address, hardware type, interface name, etc.

Example:
Switch#sh arp
Total arp items: 3, matched: 3, Incomplete: 0
Address	Hardware Addr	Interface	Port	Flag
50.1.1.6	00-0a-eb-51-51-38 Vlan50		Ethernet3/11	Dynamic
		374