I am hoping someone can help me with this problem that I cant seem to figure out.
Router EIGRP1 is connected to 2 routers f0/0 - R1, f 0/1 - R9.
I can get a eigrp neighbour with R9 but I cant work out why I cant get a neighbour between EIGRP 1 and R1. They can ping each other directly. The IP adds are correctly configured ( I think). The topology table is showing P routes on both routers for each other. If someone can shed some light this will be appreciated.
EIGRP1(config-router)#do show cdp nei
R1 Fas 0/0 133 R S I 3725 Fas 0/0
R9 Fas 0/1 133 R S I 3725 Fas 0/1
EIGRP1(config-router)#do show ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 172.18.30.10 YES manual up up <<<< /31 mask
FastEthernet0/1 172.18.30.5 YES NVRAM up up
R1(config-router)#do show ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 172.18.30.11 YES manual up up <<< this has a /31 mask
FastEthernet0/1 172.18.30.3 YES NVRAM up up
R1(config)#do show cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Local Intrfce Holdtme Capability Platform Port ID
R4 Fas 0/1 122 R S I 3725 Fas 0/1
EIGRP1 Fas 0/0 122 R S I 3725 Fas 0/0
EIGRP1(config-router)#do show ip eigrp nei <<< no R1 in neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
2 172.18.30.4 Fa0/1 13 00:48:39 833 4998 0 10
1 172.18.20.1 Se1/1 12 00:48:39 30 200 0 9
0 172.18.20.3 Se1/0 14 00:48:39 28 200 0 9
EIGRP1(config-router)#do show ip eigrp top
IP-EIGRP Topology Table for AS(1)/ID(172.18.30.7)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 172.18.30.4/31, 1 successors, FD is 281600
via Connected, FastEthernet0/1
P 172.18.20.2/31, 1 successors, FD is 2169856
via Connected, Serial1/0
P 172.18.30.10/31, 1 successors, FD is 281600
via Connected, FastEthernet0/0
P 172.18.20.0/31, 1 successors, FD is 2169856
via Connected, Serial1/1
