System information

BSR 64000 Configuration and Management Guide
5-14
4. To enable an interface for data processing without an explicit IP address, use the
ip unnumbered command in Interface Configuration mode, as shown below:
MOT(config-if)#ip unnumbered {loopback <n> | pos <slot>/<interface> |
serial <slot>/<interface> | ethernet <slot>/<interface> gigaether | <slot>/
<interface>}
where:
loopback is the loopback interface on the POS module.
n is the loopback interface from 1 to 16.
pos is POS interface the on the POS module.
serial is the Serial interface on the POS module.
ethernet is the loopback interface on the 10/100 Ethernet module or Ethernet
management interface or serial interfaces on the SRM.
gigaether is the loopback interface on the Gigabit Ethernet module.
slot identifies the module slot number.
interface identifies the BSR interface number.
Configuring the Address Resolution Protocol
Since no relationship exists between an Ethernet (MAC) address and an Internet
address, a router uses the Address Resolution Protocol (ARP) to send a packet across
the network to a host with a known Internet address. A host that uses ARP maintains a
cache of Internet-to-Ethernet address mappings. To keep the cache from growing too
large, dated entries are removed. Before transmitting a packet, the host checks its
cache for the Internet-to-Ethernet address mapping. If the mapping is not found, the
host sends an ARP request.
To add a permanent ARP entry for an interface on the BSR, use the steps in this
section:
1. To add an entry to the ARP cache, use the arp command in Global Configuration
mode, as shown in the example below:
MOT(config)#arp <A.B.C.D> <mac-address> <type> [alias]
where: