Arp Configuration; Arp Local Proxy Configuration - Lenovo RackSwitch G8264 Command Reference Manual

ARP Configuration

ARP Local Proxy Configuration

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G8264 Command Reference for ENOS 8.4
Address Resolution Protocol (ARP) is a protocol used by the Internet Protocol (IP),
specifically IPv4. ARP resolves a physical address from an IP address. ARP queries
machines on the local network for their physical addresses. ARP also maintains IP
to physical address pairs in its cache memory. In any IP communication, the ARP
cache is consulted to see if the IP address of the computer or the router is present in
the ARP cache. Then the corresponding physical address is used to send a packet.
Table 267.
ARP Configuration Options
Command Syntax and Usage
ip arp rearp <2‐120>
Defines re‐ARP period, in minutes, for entries in the switch arp table. When
ARP entries reach this value the switch will re‐ARP for the address to attempt
to refresh the ARP cache.
The default value is 5 minutes.
Command mode: Global configuration
show [ip] arp
Displays the current ARP configurations.
Command mode: All
By using ARP local proxy feature, the router mediates the ARP traffic
performed within a subnet. Each ARP request is received by the router. In
response, the router sends its own MAC address. Any traffic between hosts is
forwarded via the routerʹs layer 3 interface.
Note: For a routed interface, enabling ARP local proxy feature requires disabling
all ICMP redirects.
Table 268.
ARP Local Proxy Configuration Options
Command Syntax and Usage
[no] ip local­proxy­arp
Enables or disables the ARP local proxy.
Command mode: Interface IP/Interface Port
show interface ip [<1‐128>]
Displays the current interface settings.
Command mode: All