- It is an inter-domain protocol used to exchange network reachability information between two or more BGP routers (also called as BGP speakers).
- It is used to enable two different autonomous systems to exchange the routing information in such a way that an IP traffic can flow across the autonomous system border.
- Each BGP router can establish a TCP connection with one or more BGP routers.
- If two routers are connected in the same subnetwork, they are considered as neighbors.
- If two routers are connected in different autonomous systems, they are allowed to exchange the routing information. BGP uses TCP/IP protocol to create reliable connection in sessions.
- BGP connections inside an autonomous system are called as internal BGP and connection between two different autonomous systems are called as external BGP.
RIP vs OSPF
| RIP | OSPF |
|---|---|
| It is easy to configure. | It needs network design and planning. Hence, OSPF is complicated to configure. |
| RIP is slow to adjust link failures. | OSPF is quick to adjust link failures. |
| System with only one network interface can run RIP in passive mode. | Passive mode is not available in OSPF. |
| It is a distance vector routing protocol. | It is a link state routing protocol. |
