EIGRP Basic DUAL rule

Hi All,

  I was going though the "EIGRP Network Design solutions" and have couple of
questions based on the below lines.Kindly help me to understand the same.

*Basic DUAL Rules*
*

   1) Whenever a router chooses a new successor,it informs all its other
neighbors about the new reported distance

   2) Every time a router selects a successor,it sends a poison update to
its successor(poison reverse)

   3) A poison update is sent to all neighbors on the interface through
which the successor is reachable unless split-horizon is turned off,in which
case,it's sent to only the successor

I am understanding that a posion update is a regular update with delay set
to infinity.What is that infinity value,is it the maximum delay value which
can be set on an interface (16777215 tens of microseconds)? .If that is the
case,why not the other parameters like bandwith is not set to maximum value
in the posion update.

Also I am trying to undertstand,point 3 above,is the posion update depends
on the split-horizon enabled on the interface.

Kindly clarify the above.Thanks for the assistance.

Regards

Anantha Subramanian Natarajan

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Received on Sat Aug 22 2009 - 18:45:45 ART