LDP session issues

[Rickdatech]

I use a cpipe service using LDP. Recently a carrier Ethernet provider using vpls had to enable per-service-hasing before my both (targeted & linked) ldp sessions would establish.

The documentation talks about using this particular hashing in relation to LAG, and VPLS. AS I understand it, the hashing is used to make sure services (since session information is not available mpls) flow over the same path so frames don't get out of order.

My question is: will frames being out of order prevent LDP from establishing?

Rick

[Rickdatech]

I found the answer in RFC5036:

Correct operation of LDP requires reliable and in-order delivery of
messages. To satisfy these requirements, LDP uses the TCP transport
for Session, Advertisement, and Notification messages, i.e., for
everything but the UDP-based discovery mechanism.