Finishing the router configuration
36
PR2000 Installation Guide
5 Finishing the router configuration
In this Chapter
This chapter explains how to configure most of the remaining parameters
required for basic router operation. At the end of this chapter, your router should
be functional.
5.1 Configuring Static and Default Routes
A router forwards data packets based on entries in the routing table. There are
two types of route entries in the PR2000 routing table: Dynamic (learned by the
PR2000 from information received through a routing protocol such as RIP or
OSPF) and Static (entered manually by the router administrator).
Upon receipt of a packet, a router looks at the destination IP address (or IPX
network number) and, based on information in its routing table, forward the
packet to the correct interface.
To list all the entries in the routing table, select Info->Show Routing Table
from the main menu. This lists all current entries in the routing table (if both IP
and IPX networking protocols are enabled, you will also need to select what
routing table to list). The PR2000 knows the routes for the networks it is directly
connected to. It also knows the routes received from other routers/servers
through a routing protocol. You can also add/modify/delete additional entries.
In the routing table listing, besides the information on the destination address
and the subnet mask for the entry, there is additional information about each
route. Gateway shows the IP address of the gateway or “Deliver directly” if the
destination is specified as a local interface. Interface specifies the interface the
gateway can be reached by. Metric expresses the metric for that route. Circuit
indicates whether the route belongs to a multilink circuit or not. Type specifies
the origin of that route: “S” for Static, “C” for Connected, “R” for RIP, “O IA” for
OSPF intra-area, “O E1” OSPF External type 1, “O E2” for OSPF External type
2.
In a small configuration where the PR2000 is connecting a LAN to a remote
central site or ISP, you normally will not need to configure more than one static
route. All you will need to do is add a "default gateway route" by entering a
