The difference between BGP and IGP

• is to realize the exchange and learning of routing information.

• The ability to implement routing

• BGP typically used in large networks, which can accommodate more routing information; IGP protocol, the amount of storage for routing entries is limited, such as OSPF agreement, which can only accommodate 1W routing;

• IGP is the internal gateway protocol, as internal implementation of routing information exchange; BGP is the Border Gateway protocol, as to realize the exchange of routing information;

• BGP the implementation, need IGP as the basis of its underlying communication;

• BGP is to establish a reliable TCP based on, the port number is 179 ;

• IGP The design focus is on routing learning and switching, discovering routes, etc., while BGP is designed primarily to control the propagation of routes, i.e. path selection, BGP There are a wealth of routing strategies that BGP is a routing protocol, rather than BGP is a path selection protocol;

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The difference between BGP and IGP