When two LDP neighbors negotiate a session and establish the TCP connection, which neighbor becomes the active TCP opener?

In LDP, when two routers attempt to establish a TCP session for label exchange, the router with the higher transport address (which is typically its router ID, often the highest loopback IP address) becomes the active TCP opener. This is a deterministic mechanism to avoid simultaneous connection attempts and ensure a single, successful TCP connection. The other router acts as the passive listener. The number of interfaces in the MPLS backbone or the number of LDP TCP neighbors are not factors in determining the active TCP opener. While the lowest IP address is an IP address, it is not the criteria used; the higher IP address (router ID) is the deciding factor.