EIGRP FD is infinity

[Dinesh Kumar Mariappan]

                   i am checked one of production router FD is infinity... what it denotes?

Sh ip eigrp topology

P X.X.X.X , 1 successors, FD is infinity, tag 64520

  Via  X.X.X.X(wan Ip) (419584/419328), Gigaethernet1/01

and also found advertised distance to be zero,

P  X.X.X.X  1 succesors, FD is 2816

via RStatic(2816/0)

need explanation  for  marked bold letters..(Infinity,tag and Rstatic and AD is zero) what those keywords denotes..

[Peter Paluch]

Hi Dinesh,

In EIGRP, the FD being set to infinity means that the route has been learned via EIGRP but at the same time, it is known from another source that is more trustworthy, so the learned route can not be used. Notice that in your case, the network is both learned via EIGRP, and at the same time, redistributed from static routes on your own router into EIGRP. In this case, the static route is considered more trustworthy, as its administrative distance is 1, so the EIGRP-learned route won't make it into the routing table. That is the reason for having the FD set to infinity to explain that the EIGRP-learned route is currently unusable.

Best regards,

Peter

[Muhammad Thanveer]

Thanks Peter,

Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."

[MUKUL JOSHI]

Thanx Peter

BRegards

MJ

[baodt2012]

Perfect answer