Generating Routing Table Information - 3Com CoreBuilder 2500 User Manual

Figure 6-4 shows an example of a typical routing information table.
Routing table
Interface Address
1 1
2 45469f30
2 45469f33
Figure 6-4 Sample Routing Table

Generating Routing Table Information

The routing information table is updated statically or dynamically.
Static Update You manually configure a static route. Static routes are
useful in environments where no routing protocol is used or where you
want to override a routing protocol's generated route.
Because static routes do not automatically change in response to network
topology changes, manually configure only a small number of reasonably
stable routes. Static routes do not change until you change them, and
they do not time out.
Dynamic Update A router uses RIP to exchange its routing table with
other routers at regular intervals. This automatic method of learning
routes helps you to keep up with a changing network environment and
allows you to reconfigure routes quickly and reliably. Interior Gateway
Protocols (IGPs), which operate within intranetworks, provide this
automated learning. The CoreBuilder 2500 system uses RIP (one of the
most widely used IGPs) to dynamically build routing tables.
RIP operates with active and passive network devices. Active devices,
usually routers, broadcast their RIP messages to all devices in a network;
they update their own routing tables when they receive a RIP message.
Passive devices, usually hosts, listen for RIP messages and update their
routing tables; they do not send RIP messages.
An active router sends a RIP message every 60 seconds. This message
contains the network number for each destination network and the
number of hops to reach it. In RIP, each router through which a packet
must travel to reach a destination counts as one network hop.
Elements of IPX Routing
Hops Ticks Node
1 1 00-00-00-00-00-00
1 1 00-00-00-00-00-00
2 3 08-00-17-04-33-45
6-9
Age
0
0
40