Re:Network Protocols
by dronemallone on Thursday June 08, 2017 @11:48PM
(#14519052)
BGP is a policy-based routing protocol, whereas OSPF/RIP are performance based. BGP is not "the" routing protocol, just that it's widely used because of its simplicity.
You should consider reading Kurose/Ross: http://eclass.uth.gr/eclass/modules/document/file.php/INFS13...
Maybe I don't understand the realities of networking as well as I though. But my understand was that once packets enter my ISP's network, on my home connection, the rest of the way they get routed to me with protocols other than BGP. That's quite a lot of routing being done with non-BGP protocols.
Between major networks, BGP.
Inside the major network to your cable headend or similar: OSPF or IS-IS or something else - in the largest ISPs, a combination of iBGP to get things to right area and then OSPF, IS-IS or EIGRP in medium areas.
Inside your house: almost always static routes, no protocol for exchanging reachability info.
BGP is the routing protocol on the internet, and it's a fairly common one to see inside enterprise networks as well - iBGP is for routing inside an AS. Describing OSPF, IS-IS, etc would have just made things a little more complicated without adding anything.