Why BGP is used over OSPF?

Why BGP is used over OSPF? 

Routing protocols are going to be represented a set of rules or algorithms that instruct routers on about how to communicate with each other, so they could redirect traffic to the best path. There are several routing protocols, and the type of routing protocol which would be chosen is considered essential for every network administrator. We would now provide a better explanation on about how to use the OSPF and BGP routing protocols and also about how to choose between OSPF vs BGP according to your needs.

OSPF vs BGP: What Is the Difference?

First things First, we need to understand the difference between the BGP and OSPF. The main difference between OSPF and BGP is that the OSPF is considered to be an intra-domain routing protocol which would be utilizing the link state routing, and the routing operation is performed inside an autonomous system while BGP is considered to be the inter-domain routing protocol that would be utilizing the path vector routing, with the routing operations that would be performed between two autonomous systems. 

Some other differences between BGP and OSPF include:

The OSPF would be following a hierarchical structure whereas BGP would be usually adopting the mesh structure. OSPF would require intensive use of memory as well as CPU resources. With BGP on the other hand, the size of the routing table is going to be dictated the required device resources. BGP is considered to be more flexible as well as scalable than OSPF and it would be also used on a larger network. OSPF would be used to determine the fastest route whereas the BGP would be putting emphasis on determining the best path.

Why Choose BGP over OSPF?

Well, Because OSPF stub areas which would be a total mess to configure. One host would be going crazy would impact at least all other hosts in a similar area. Definitely it wouldn’t be as bad as running servers in the backbone area but still. Maybe it is not considered to be relevant if you’re running the same version of Quagga on both ends.

Well, you would be able to control the summarization of prefixes from the totally stubby area into backbone area theoretically, not sure many vendors would actually going to implement that, but within the area, you would have to still trust everyone. That might not be considered to be quite a problem if you control all the hosts, but would be considered as a huge deal if you don’t. 

OSPF vs BGP: How to Choose?

If you would be conducting internal routing, as the routing within a site, company, or campus, you would be willing to use OSPF. BGP would be typically needed at a site edge, where you would be a route out to the public internet. If you are looking at building in-site with multiple homes, you would have to consider wishing to consider BGP. 

Moreover, for an enterprise network, you should go for the OSPF as your routing protocol. As developed as well as mature protocol, OSPF is considered to be supported by the vast majority of network vendors. As a service provider would be adopting the BGP to carry your customers' routes. Generally, most of the service providers would be using the IGP to carry Infrastructure IPs as well as BGP to carry customer routes.

Now, you have gained all the knowledge about why to choose the BGP protocols over the OSPF. Also, if you wish to gain more information regarding the same and also if you wish to have more help with lots of IT related Certification, you should choose SPOTO for the same.