S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m
Configuring Advanced BGP
This chapter describes how to configure advanced features of the Border Gateway Protocol (BGP) on the
Cisco NX-OS switch.
This chapter includes the following sections:
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Information About Advanced BGP
BGP is an interdomain routing protocol that provides loop-free routing between organizations or
autonomous systems. Cisco NX-OS supports BGP version 4. BGP version 4 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 switches called BGP peers. When connecting to an external organization, the router
creates external BGP (eBGP) peering sessions. BGP peers within the same organization exchange
routing information through internal BGP (iBGP) peering sessions.
This section includes the following topics:
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Information About Advanced BGP, page 6-1
Licensing Requirements for Advanced BGP, page 6-9
Prerequisites for BGP, page 6-9
Guidelines and Limitations for BGP, page 6-10
Default Settings, page 6-10
Configuring Advanced BGP, page 6-10
Verifying the Advanced BGP Configuration, page 6-38
Displaying BGP Statistics, page 6-39
Related Topics, page 6-39
Additional References, page 6-40
Feature History for BGP, page 6-40
Peer Templates, page 6-2
Authentication, page 6-2
Route Policies and Resetting BGP Sessions, page 6-3
eBGP, page 6-3
iBGP, page 6-3
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
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