You can use the BGP4+ multipath feature to enable load balancing different BGP4+ paths.
device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# maximum-paths 8
device(config-bgp-ipv6u)# maximum-paths use-load-sharing
The following example summarizes the commands in this procedure
device# configure terminal device(config)# router bgp device(config-bgp-router)# address-family ipv6 unicast device(config-bgp-ipv6u)# maximum-paths 8 device(config-bgp-ipv6u)# maximum-paths use-load-sharing