Hello folks,
As we know, both OSPF and BGP are dynamic routing protocols that could provide a self-adaption forwarding routing table and make self convergence possible when the network topology changes. The OSPF and BGP are the commonly used dynamic protocols, they are usually compared with each other in the live network to determine which one should be used in the network. In this post, we’ll introduce the difference between OSPF and BGP.
OSPF spreads LSAs in the area to synchronize the link-state information, the OSPF router takes itself as the root and runs the SPF algorithm to calculate out the routing information while the BGP spreads the routing information between the different ASs.
Unlike the OSPF spreads the packets to the multicast address which is 224.0.0.5/6, the BGP packets are based on TCP protocol port 179, and it sends the update information to the unicast address.
BGP could accommodate more routing entries than the OSPF does.
BGP provides the most routing control methods in all the routing protocols based on the BGP-rich attributes and community properties.
This could allow you to control the route path most accurately.
With that being said, the following conditions should be considered when choosing which protocols should be used.
the number of routing entries.
BGP could maintain lots more route entries than the OSPF does.
the performance of the router.
BGP requires a higher performance of the router than the OSPF does.
the scale of the network.
BGP could maintain a larger scale of the network than the OSPF does.
others
BGP needs to apply for the AS number from the specific organization, while the OSPF AS number could be defined by the users themselves.
That’s all for this post, if you have any questions, feel free to describe it.
If you wanna learn more, please visit our collection BGP - From junior to expert
Thanks.
