Routing Protocol Overview; Static Routing And Dynamic Routing; Classification Of Dynamic Routing Protocols - H3C S5600 SERIES Operation Manual

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Routing Protocol Overview

Static routing is easy to configure and requires less system resources. It works well in small, stable

networks with simple topologies. It cannot adapt itself to any network topology change automatically so

that you must perform routing configuration again whenever the network topology changes.

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. It is

complicated to configure, and it not only imposes higher requirements on the system than static routing,

but also occupies a certain amount of network resources.

Dynamic routing protocols can be classified based on the following standards:

Operational scope

Interior Gateway Protocols (IGPs): Work within an autonomous system, typically including RIP,

OSPF, and IS-IS.

Exterior Gateway Protocols (EGPs): Work between autonomous systems. The most popular one is

An autonomous system refers to a group of routers that share the same routing policy and work under

the same administration.

Routing algorithm

Distance-vector protocols: RIP and BGP. BGP is also considered a path-vector protocol.

Link-state protocols: OSPF and IS-IS.

The main differences between the above two types of routing algorithms lie in the way routes are

discovered and calculated.

Type of the destination address

Unicast routing protocols: RIP, OSPF, BGP, and IS-IS.

Multicast routing protocols: PIM-SM and PIM-DM.

This chapter focuses on unicast routing protocols. For information on multicast routing protocols, refer

to the part discussing Multicast.

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