Router_A#show ip eigrp topology
IP-EIGRP Topology Table for process 1
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status
P 172.16.4.0/24, 1 successors, FD is 21017600
via 172.16.3.2 (21017600/281600), Serial1
via 172.16.2.2 (40537600/281600), Serial0
P 172.16.1.0/24, 1 successors, FD is 281600
via Connected, Ethernet0
P 172.16.2.0/24, 1 successors, FD is 40512000
via Connected, Serial0
P 172.16.3.0/24, 1 successors, FD is 20992000
via Connected, Serial1