BGP can advertise a stable route that does not need to exist in routing table.
device# configure terminal
device(config)# router bgp
device(config-bgp-router)# local-as 1000
device(config-bgp-router)# address-family ipv4 unicast
device(config-bgp-ipv4u)# static-network 10.11.12.0/32 distance 300
device# configure terminal device(config)# router bgp device(config-bgp-router)# local-as 1000 device(config-bgp-router)# address-family ipv4 unicast device(config-bgp-ipv4u)# static-network 10.11.12.0/32 distance 300