Configuring the DSL Router
Address Resolution Protocol (ARP)
Address Resolution Protocol, as specified in RFC 826, is supported in the DSL router. The DSL router provides for a total of 265 ARP table entries. The timeout for completed and uncompleted ARP table entries is configurable.
NOTE:
The DSL router does not process ARP requests and ARP responses on its DSL interface when it is configured to support RFC 1483 PDU routing (Standard mode). See Routed vs. Bridged PDUs on page
The Command Line Interface provides the ability to:
HCreate up to 64 static ARP table entries to be retained across power cycles.
HDisplay the ARP table.
HDelete ARP table entries.
HDisplay and delete automatically added static ARP table entries by the DHCP server and relay functions. Refer to Dynamic Host Configuration Protocol (DHCP) Server on page
Proxy ARP
The DSL router supports Proxy ARP. Proxy ARP responses are based on the IP Routing table contents. The IP Routing table must have an entry for every host that is reachable on the Ethernet interface, including hosts for which the DSL router will not forward packets because of IP filters. If an ARP request is received on one interface for an IP address that is reachable on the other interface, the DSL router will respond with its own MAC address.
NOTE:
The Proxy ARP option is not available on the DSL interface when the DSL router is configured to support RFC 1483 PDU routing. See Routed vs. Bridged PDUs on page
The Command Line Interface provides the ability to enable and disable Proxy
ARP for each interface.
NOTES:
ÐWhen Basic NAT is enabled, the DSL interface (dsl1) must have Proxy ARP enabled if the dsl1 interface address is part of the Basic NAT global IP network address.
ÐProxy ARP and NAPT cannot be enabled at the same time.
August 2000 |
