You configure a BGP peer as a route-reflector client from the device that is the route reflector.
device# configure terminal
device(config)# router bgp
device(config-bgp-router)# local-as 1000
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 route-reflector-client
The following example summarizes the commands in this procedure.
device# configure terminal device(config)# router bgp device(config-bgp-router)# local-as 1000 device(config-bgp-router)# address-family ipv6 unicast device(config-bgp-ipv6u)# neighbor 2001:db8:e0ff:783a::4 route-reflector-client