This is the round trip delay of the link in milliseconds. This value
represents a nominal delay for connectionless traffic.
Connectionless traffic is biased away from trunks carrying path-
oriented traffic by increasing this value. The value of this attribute is
a function of the percentage of reserved path-oriented bandwidth
and takes a maximum value of 1500 msec for 100% path-oriented
trunks. If an override delay is specified, it will be used instead.