Specifications

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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 5 Configuring Basic BGP
CLI Configuration Modes
Global Configuration Mode
Use global configuration mode to create a BGP process and configure advanced features such as AS
confederation and route dampening. For more information, see Chapter 6, “Configuring Advanced
BGP.”
This example shows how to enter router configuration mode:
switch# configuration
switch(config)# router bgp 64496
switch(config-router)#
BGP supports Virtual Routing and Forwarding (VRF). You can configure BGP within the appropriate
VRF if you are using VRFs in your network. See the “Configuring Virtualization” section on page 6-37
for more information.
This example shows how to enter VRF configuration mode:
switch(config)# router bgp 64497
switch(config-router)# vrf vrf_A
switch(config-router-vrf)#
Address Family Configuration Mode
You can optionally configure the address families that BGP supports. Use the address-family command
in router configuration mode to configure features for an address family. Use the address-family
command in neighbor configuration mode to configure the specific address family for the neighbor.
You must configure the address families if you are using route redistribution, address aggregation, load
balancing, and other advanced features.
This example shows how to enter address family configuration mode from the router configuration
mode:
switch(config)# router bgp 64496
switch(config-router)# address-family ipv4 unicast
switch(config-router-af)#
This example shows how to enter VRF address family configuration mode if you are using VRFs:
switch(config)# router bgp 64497
switch(config-router)# vrf vrf_A
switch(config-router-vrf)# address-family ipv4 unicast
switch(config-router-vrf-af)#
Neighbor Configuration Mode
Cisco NX-OS provides the neighbor configuration mode to configure BGP peers. You can use neighbor
configuration mode to configure all parameters for a peer.
This example shows how to enter neighbor configuration mode:
switch(config)# router bgp 64496
switch(config-router)# neighbor 192.0.2.1
switch(config-router-neighbor)#
This example shows how to enter VRF neighbor configuration mode: