Like @lagapidis, I tried to figure this out but I can’t find anything why they used UDP 4343. The official LISP ports that were assigned by IANA are 4341 and 4342. I guess they wanted to stay away from those two for EIGRP OTP, which is why they used 4343 instead.
Unicall seems to be an old protocol:
So there’s probably no harm using UDP 4343 instead.