TDP default behavior

Folks ,
on ATM cell mode , does the TDP establish the session from the loopback or
from the interface ??
 
my understanding is that both LDP and TDP establish the TCP session from the
loopbacks by default ( so the loopback should be known to both sides for the
session to come up )
 
but on ATM cell mode , even though the loopback of the other end is not known
on each router , the session is coming up normally ?
 
am i missing something ?
 
thanks in advace
 

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Received on Mon Apr 20 2009 - 01:33:37 ART