LevelOne GTL-2691 - Manual (Page 630)

C HAPTER 18 | General IP Routing
Address Resolution Protocol
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Figure 383: Configuring General Settings for ARP
C ONFIGURING S TATIC
ARP A DDRESSES
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 R EFERENCES
◆ "arp" on page 1399
C OMMAND U SAGE
◆ 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.
◆ You can define up to 128 static entries in the ARP cache.
◆ 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.
◆ Static entries will not be aged out or deleted when power is reset. You
can only remove a static entry via the configuration interface.
◆ Static entries are only displayed on the Show page for VLANs that are
up. In other words, static entries are only displayed when configured
for the IP subnet of an existing VLAN, and that VLAN is linked up.
P ARAMETERS
These parameters are displayed:
◆ 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)