LDP route injection

By default, LDP advertises all /32 prefixes that are learned from all the loopback interfaces to all other LDP peers. LDP route injection enables LDP to advertise other prefixes that are learned by IGP. When you enable route injection, it references prefix lists for permitted and denied prefixes. When IGP learns these prefixes, the device injects them into LDP and advertises the corresponding labels to the LDP peers.