Selecting an Appropriate Interior Routing Protocol

The selection of a routing protocol is based on the design goals and the physical topology of the network. Both EIGRP and OSPF are recommended as enterprise routing protocols.

When choosing routing protocols, you can use Table 7-3 as a decision table template. Decision tables are discussed in Chapter 2, "Applying a Methodology to Network Design." Additional rows can be added to specify other parameters that might be important in the specific network.

Table 7-3 Routing Protocol Selection Decision Table Template

Parameters

OSPF

EIGRP

Required Network Parameters

Size of network (small/medium/large/very large)

Large

Large

Speed of convergence (very high/high/medium/low)

High

Very high

Very good scalability (yes/no)

Yes

Yes

Support for VLSM (yes/no)

Yes

Yes

Support for mixed vendor devices (yes/no)

Yes

No

Multiple network layer protocol support (yes/no)

No

Yes

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