Features of the Border Gateway Protocol

In the previous article, we introduced the features of the IS-IS protocol. Next we will summarize some of the features of the BGP Border Gateway Protocol. Hope to help you. Let's take a look at the text.

Border Gateway Protocol (BGP)

It is ideal for replacing the old-fashioned external Gateway Protocol (EGP). BGP provides routes between autonomous systems (, it is a standard Router Protocol on the Internet. This refers to external BGP. When the BGP Border Gateway Protocol is used to provide routes within the autonomous system, it refers to the internal BGP. BGP is not a Router Protocol provided for inexperienced people. It has good reasons to require all manual configuration. You will not only affect yourself, it will also affect me. To diagnose BGP faults, if the routes are not in the BGP table, they have no way to enter the route table. Always make sure your neighbors are talking to you. One of the most useful commands in BGP troubleshooting can be seen in the ip BGP summary ｡

The BGP Border Gateway Protocol has the following features:

1. open protocols ｡

2. Suitable for ultra-large interconnected networks ｡

3. Design and setup are not as easy as other protocols. Everything should be set manually, including neighbors ｡

4. Advanced distance vector or path vector Router Protocol ｡

5. EGP ｡

6. TCP port 179 ｡

7. The internal management distance is 200, and the external management distance is 20 ｡

8. The measurement criteria include many factors, such as MED, origin, autonomous system channels, next hop, and community ｡

9. do not require a unique route ｡

10. hierarchical structure developed by users ｡

11. automatic and manual summarization ｡

12. Policy-based routing ｡

These are all the features of the BGP Border Gateway Protocol.