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3. Configuring the DSL Router
6300-A2-GB20-10 November 2003
3-5
Network Considerations
The routers can be configured to function in a variety of network environments.
The following sections provide descriptions of some of the router’s features:
Address Resolution Protocol (ARP) on page 3-5
Proxy ARP on page 3-6
Network Address Translation (NAT) on page 3-7
— Basic NAT
— Network Address Port Translation (NAPT/PAT)
— Simultaneous Basic NAT and NAPT
Dynamic Host Configuration Protocol (DHCP) Server on page 3-9
DHCP Relay Agent on page 3-10
Security on page 3-11
— IP Protocol Type Filtering
— Ethernet Type Filtering
— Land Bug/Smurf Attack Prevention
Routed vs. Bridged PDUs on page 3-13
PPPoE Client Support on page 3-14
Address Resolution Protocol (ARP)
Address Resolution Protocol, as specified in RFC 826, is supported in the router.
Up to 265 ARP Table entries are supported, and a timeout period for complete and
incomplete ARP Table entries can be configured.
NOTE:
ARP is not available on the DSL interface when PPPoE is enabled for the
ReachDSL Router.
ARP requests and responses are not processed on the DSL interface when the
interface is configured to support RFC 1483 PDU routing (Standard mode). Refer
to Routed vs. Bridged PDUs on page 3-13 for more information.