Question on EIGRP output

[HungryHouse]

Can someone help me to understand the feasible distances, and successors here in this EIGRP topology table?

Router# show ip eigrp topology

IP-EIGRP Topology Table for process 77

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status

P 172.16.90.0 255.255.255.0, 2 successors, FD is 0
via 172.16.80.28 (46251776/46226176), Ethernet0
via 172.16.81.28 (46251776/46226176), Ethernet1
via 172.16.80.31 (46277376/46251776), Serial0
P 172.16.81.0 255.255.255.0, 1 successors, FD is 307200
via Connected, Ethernet1
via 172.16.81.28 (307200/281600), Ethernet1
via 172.16.80.28 (307200/281600), Ethernet0
via 172.16.80.31 (332800/307200), Serial0

I understand that the first number in parentheses is the feasible distance, however, why does the top route say FD is 0 then? Also the top route says there are (2)successors, so which of these top 2 routes will be populated in the routing table?
The second route shows 1 successor, however, the two routers it learned from (172.16.81.28) and (172.16.80.28) show the exact same FD and Advertised distance.
I am confused.


Real trouble call:
Customer: "I have a huge problem. A friend has put a screensaver on my computer, but every time I move the mouse, it disappears!"

 

[burtsbees]

The 2 successor routes will load balance.

The second route shows 1 successor, however, the two routers it learned from (172.16.81.28) and (172.16.80.28) show the exact same FD and Advertised distance.

via Connected, Ethernet1

Since it is directly connected it wins. Then it takes the IP address and speed into account.

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!