HSRP routers learn a group's Hellotime or Holdtime from
hello messages.
The Hellotime is used to determine the frequency of
generating hello messages when this router becomes the
active or standby router. The Holdtime is the interval
between the receipt of a Hello message and the presumption
that the sending router has failed.
If this object is TRUE, the cHsrpGrpConfiguredHelloTime and
cHsrpGrpConfiguredHoldTime will be used. If it is FALSE,
the Hellotime and Holdtime values are learned.