Product specifications

Chapter 6: Connection Management Efficient Networks
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Router family
Command Line Interface Guide
Page 6-6 Efficient Networks
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ARP
ARP is a low-level protocol within TCP/IP that "maps" IP addresses to hardware MAC
addresses. ARP works by broadcasting an ARP request with the IP address out onto
the network. The node with that IP address responds to the request with the MAC
address of its Ethernet adapter. (The MAC address is hard-coded on the Ethernet
adapter). The node that sent the request updates its ARP table with a new mapping of
the IP-to-MAC address.
Multicast Forwarding Controls
The forwarding of multicast packets by an interface depends on the setting of the
multicast IP option for that interface. To turn on multicast forwarding for a remote
interface, use the command:
-> remote setipoptions multicast on <remotename>
If any remote interface has multicast forwarding enabled, then multicast forwarding is
automatically enabled on all Ethernet interfaces. However, multicast forwarding can
be turned off or turned on for an Ethernet interface using the command:
-> eth ip options multicast on | off <interface>
To see the current setting, use the eth list command and check the output line:
-> eth list
Multicast forwarding enabled....... no