C
HAPTER
17
| General IP Routing
Address Resolution Protocol
– 444 –
CONFIGURING STATIC
ARP ADDRESSES
For devices that do not respond to ARP requests or do not respond in a
timely manner, traffic will be dropped because the IP address cannot be
mapped to a physical address. If this occurs, use the IP > ARP (Configure
Static Address – Add) page to manually map an IP address to the
corresponding physical address in the ARP cache.
CLI REFERENCES
â—† "arp" on page 1011
COMMAND USAGE
â—† The ARP cache is used to map 32-bit IP addresses into 48-bit hardware
(that is, Media Access Control) addresses. This cache includes entries
for hosts and other routers on local network interfaces defined on this
router.
â—† You can define up to 128 static entries in the ARP cache.
â—† A static entry may need to be used if there is no response to an ARP
broadcast message. For example, some applications may not respond
to ARP requests or the response arrives too late, causing network
operations to time out.
â—† Static entries will not be aged out or deleted when power is reset. You
can only remove a static entry via the configuration interface.
PARAMETERS
These parameters are displayed in the web interface:
◆ IP Address – IP address statically mapped to a physical MAC address.
(Valid IP addresses consist of four numbers, 0 to 255, separated by
periods.)
◆ MAC Address – MAC address statically mapped to the corresponding
IP address. (Valid MAC addresses are hexadecimal numbers in the
format: xx-xx-xx-xx-xx-xx)
WEB INTERFACE
To map an IP address to the corresponding physical address in the ARP
cache using the web interface:
1. Click IP, ARP.
2. Select Configure Static Address from the Step List.
3. Select Add from the Action List.
4. Enter the IP address and the corresponding MAC address.
5. Click Apply.
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