fd and rd in eigrp...

feasible distance

reported distance

the feasible distance is an integer metric based on the local router's perspective; the best route to a prefix

reported distance is the same as above but from the perspective of the neighbor

the fd is the determined best route (lowest metric calculation); the rd is an alternate route used in the event of fd failure...

dls1#sh ip eigrp topo 10.1.1.0/24
EIGRP-IPv4:(1) (AS 1): Topology Default-IP-Routing-Table(0) entry for 10.1.1.0/24
  State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2170112
  Descriptor Blocks:
  172.16.1.10 (Vlan1), from 172.16.1.10, Send flag is 0x0
      Composite metric is (2170112/2169856), Route is Internal
      Vector metric:
        Minimum bandwidth is 1544 Kbit
        Total delay is 20010 microseconds
        Reliability is 255/255
        Load is 2/255
        Minimum MTU is 1500
        Hop count is 1
  172.16.100.2 (Vlan100), from 172.16.100.2, Send flag is 0x0
      Composite metric is (2170368/2170112), Route is Internal
      Vector metric:
        Minimum bandwidth is 1544 Kbit
        Total delay is 20020 microseconds
        Reliability is 255/255
        Load is 2/255
        Minimum MTU is 1500
        Hop count is 2
  172.16.200.2 (Vlan200), from 172.16.200.2, Send flag is 0x0
      Composite metric is (2170368/2170112), Route is Internal
      Vector metric:
        Minimum bandwidth is 1544 Kbit
        Total delay is 20020 microseconds
        Reliability is 255/255
        Load is 2/255
        Minimum MTU is 1500
        Hop count is 2
dls1#

dls1#sh ip route 10.1.1.0
Routing entry for 10.1.1.0/24
  Known via "eigrp 1", distance 90, metric 2170112, type internal
  Redistributing via eigrp 1
  Last update from 172.16.1.10 on Vlan1, 03:23:27 ago
  Routing Descriptor Blocks:
  * 172.16.1.10, from 172.16.1.10, 03:23:27 ago, via Vlan1
      Route metric is 2170112, traffic share count is 1
      Total delay is 20010 microseconds, minimum bandwidth is 1544 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 2/255, Hops 1

dls1#sh ip route eigrp
     10.0.0.0/24 is subnetted, 2 subnets
D       10.1.1.0 [90/2170112] via 172.16.1.10, 03:31:32, Vlan1
dls1#