Operation Manual – IP Routing-GR Overview
H3C S5500-EI Series Ethernet Switches
Chapter 1 IP Routing Overview
1-3
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
11.0.0.0
16.0.0.0
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
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
Figure 1-1
A sample routing table
1.2 Routing Protocol Overview
1.2.1 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.
1.2.2 Classification of Dynamic Routing Protocols
Dynamic routing protocols can be classified based on the following standards:
