I have 6 links to a neighbor router.
All links are equal cost, operational and passing traffic.
When I traceroute to the next hop loopback address, traceroute ONLY uses 3 of the six paths.
ANYONE know why?
OER-Master1#sh ip eigrp top
IP-EIGRP Topology Table for AS(90)/ID(172.26.3.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 172.26.0.14/32, 1 successors, FD is 128256
via Connected, Loopback0
P 172.26.0.15/32, 4 successors, FD is 130816
via 172.26.2.2 (130816/128256), GigabitEthernet0/0.2
via 172.26.4.2 (130816/128256), GigabitEthernet0/0.4
via 172.26.5.2 (130816/128256), GigabitEthernet0/0.5
via 172.26.6.2 (130816/128256), GigabitEthernet0/0.6
via 172.26.1.2 (130816/128256), GigabitEthernet0/0.1
via 172.26.7.2 (130816/128256), GigabitEthernet0/0.7
Type escape sequence to abort.
Tracing the route to 172.26.0.15
1 172.26.6.2 0 msec
172.26.5.2 4 msec
172.26.4.2 0 msec
4 paths is the default for EIGRP
have you added
router eigpr ASN
otherwise only 4 successors are installed in the routing table
in other words
until you don't see all 6 paths in the ip routing table with sh ip route you cannot be sure they are all used.
Hope to help