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10-1
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
10
Configuring Basic BGP
This chapter describes how to configure Border Gateway Protocol (BGP) on a Cisco NX-OS device.
This chapter includes the following sections:
• Information About Basic BGP, page 10-1
• Licensing Requirements for Basic BGP, page 10-7
• Prerequisites for BGP, page 10-7
• Guidelines and Limitations for BGP, page 10-8
• CLI Configuration Modes, page 10-8
• Configuring Basic BGP, page 10-10
• Verifying Basic BGP Configuration, page 10-21
• Displaying BGP Statistics, page 10-23
• Basic BGP Example Configuration, page 10-23
• Related Topics, page 10-23
• Where to Go Next, page 10-24
• Default Settings, page 10-24
• Additional References, page 10-24
• Feature History for BGP, page 10-25
Information About Basic BGP
Cisco NX-OS supports BGP version 4, which includes multiprotocol extensions that allow BGP to carry
routing information for IP multicast routes and multiple Layer 3 protocol address families. BGP uses
TCP as a reliable transport protocol to create TCP sessions with other BGP-enabled devices.
BGP uses a path-vector routing algorithm to exchange routing information between BGP-enabled
networking devices or BGP speakers. Based on this information, each BGP speaker determines a path
to reach a particular destination while detecting and avoiding paths with routing loops. The routing
information includes the actual route prefix for a destination, the path of autonomous systems to the
destination, and additional path attributes.
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