![]() ![]() Link flaps, router crashes, and other unexpected events could impact the best path, so the routers must exchange information with each other so that the network topology updates during these types of events. Routers try to select the best loop-free path in a network based on the destination network. A router learns about unattached networks through static configuration or through dynamic routing protocols that distribute network topology information between routers. ![]() ![]() ![]() The following topics are covered in this chapter:īGP Messages and Inter-Router Communicationīasic BGP Configuration for IOS, IOS XR, and NX-OSĪ router’s primary function is to move packets from one network to a different network.
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