This is the way I understand it (if the drawing below doesn't come out
right, draw it on paper):
10 14
A-----------B-----------D
| |
|_____C_________________|
4 22
Let's say router A is trying to reach router D. It is determined that the
best path to get to router D is through router B. This is known as the
successor. The feasible distance in this case is the distance from router A
to router D when going through router B (let's say it is 24). The advertised
distance in this case is the distance from router B to router D (let's say
it is 14). There is a second-best route from router A to router D that goes
through router C. The feasible distance in this case is the distance from
router A to router D when going through router C (let's say 26). The
advertised distance in this case is the distance from router C to router D
(let's say 22). Can the route from router A to router D going through router
C become the feasible successor? It can if the advertised distance of the
second best route is shorter than the feasible distance of the best route.
The advertised distance of the second-best route is 22 and the feasible
distance of the best route is 24. So, in this case, the second-best route
can be the feasible successor.
HTH,
Shawn K.
-----Original Message-----
From: Colin [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 29, 2002 5:58 AM
To: [EMAIL PROTECTED]
Subject: Feasible distance? [7:33557]
Hi
Just reading about EIGRP @ Cisco's web site and am having difficulty
understanding the difference between Feasible distance and Reported
distance. Throw a Feasible successor in the mix and now I'm really
confused. Please correct me if I'm wrong but from what I understand, the
Reported distance is the total distance to the destination network. So,
then what is the Feasible distance?
Thanks
Colin
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=33573&t=33557
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