Concept and advantages and disadvantages of Dynamic Routing Protocol

Source: Internet
Author: User

Concept and advantages and disadvantages of Dynamic Routing Protocol
Understand the dynamic routing protocol:

What is dynamic routing protocol: the routing protocol is used to exchange route information between routers. Dynamic Routing Protocols include the Internal Gateway Protocol (IGP) and the external Gateway Protocol (EGP ). Through the routing protocol, the router can dynamically share information about the remote network. The routing protocol can determine the optimal path to each network, and then add the path to the routing table. The dynamic routing protocol can automatically detect remote networks. The main advantage is that as long as the network topology structure changes, routers exchange route information with each other, not only can automatically obtain new networks, you can also find the backup path when the current network connection fails.

Dynamic Routing Protocols have been applied to networks since the beginning of the 1980s S. The first version of the RIP Protocol was published in 1982. However, some of the basic algorithms were applied to ARPANET as early as 1969. With the continuous development of network technology, the more complex the network, and the emergence of new routing protocols.

Network discovery and route table maintenance:

Dynamic Routing Protocol Purpose: Exchange route information and add the best route to the routing table. The routing protocol is used as follows:

1. Remote network discovery

2. Maintain the latest route information

3. Select the Optimal Path to the target network

4. Find the new optimal path when the current path cannot be used

What are the components of the routing protocol:

1. Data Structure-Some routing protocols use Route tables and/or databases to complete the routing process. This information is stored in memory.

2. algorithm-an algorithm is a certain number of steps used to complete a task. The routing protocol uses algorithms to route information and determine the optimal path.

3. Routing Protocol Message-routing protocol uses various messages to identify neighboring routers, exchange routing information, and obtain and maintain accurate network information through other tasks.

The dynamic routing protocol runs as follows:

(The running process of the dynamic routing protocol is determined by the routing protocol type and protocol itself) 1. The router sends and receives routing messages through its interface.

2. the router shares the route message and route information with other routers using the same routing protocol.

3. The vro learns about the remote network by exchanging route information.

4. If the vro detects a change in the network topology, the routing protocol can notify other vrouters of this change.

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