Routing Protocol Overview 243
Figure 63 A sample routing table
Routing Protocol
Overview
Static Routing and
Dynamic Routing
Static routing is easy to configure and requires less system resources. It works well
in small, stable networks with simple topologies. Its major drawback is that you
must perform routing configuration again whenever the network topology
changes; it cannot adjust to network changes by itself.
Dynamic routing is based on dynamic routing protocols, which can detect network
topology changes and recalculate the routes accordingly. Therefore, dynamic
routing is suitable for large networks. Its disadvantages are that it is complicated
to configure, and that it not only imposes higher requirements on the system, but
also eats away a certain amount of network resources.
Classification of
Dynamic Routing
Protocols
Dynamic routing protocols can be classified based on the following standards:
Destination Network Next hop Interface
11.0.0.0 11.0.0.1 2
12.0.0.0 12.0.0.1 1
13.0.0.0 12.0.0.2 1
14.0.0.0 14.0.0.4 3
15.0.0.0 14.0.0.2 3
16.0.0.0 14.0.0.2 3
17.0.0.0 11.0.0.2 2
Router A
Router B
Router H
Router E
16.0.0.2
17.0.0.3
15.0.0.0
12.0.0.0
17.0.0.0
11.0.0.016.0.0.0
13.0.0.0
14.0.0.0
Router C
Router D
Router F
Router G
11.0.0.1
12.0.0.1
12.0.0.2
15.0.0.1
15.0.0.2
17.0.0.1
16.0.0.1
13.0.0.1
13.0.0.2
14.0.0.1
14.0.0.2
14.0.0.3
14.0.0.4
17.0.0.2
11.0.0.2
13.0.0.3
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