User's Manual

Table Of Contents
19-205
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
19.5.6 show arp
Command:
show arp [<ipaddress>] [<vlan-id>] [<hw-addr>] [type {static | dynamic}] [count] [vrf word]
Function:
Displays the ARP table.
Parameters:
<ipaddress> 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; word is the specified vrf name.
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#show arp
ARP Unicast Items: 7, Valid: 7, Matched: 7, Verifying: 0, Incomplete: 0, Failed: 0, None: 0
Address Hardware Addr Interface Port Flag
50.1.1.6 00-0a-eb-51-51-38 Vlan50 Ethernet1/0/11 Dynamic
50.1.1.9 00-00-00-00-00-09 Vlan50 Ethernet1/0/1 Static
150.1.1.2 00-00-58-fc-48-9f Vlan150 Ethernet1/0/4 Dynamic
Displayed information
Explanation
Total arp items
Total number of ARP entries.