HELP...EIGRP issue?

uneeqstylezz

so here is a quick diagram of my lab i just configured.

i have a feeling my ip addressing scheme is incorrect which is causing this?
ALSO...i think it has something to do with my IOS versions that is not allowing me to put a wildcard masks on my network statements.

i am getting this error on Router 2:

*Mar 1 00:48:33.199: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 172.17.1.1 not on common subnet for Ethernet0
*Mar 1 00:54:48.291: IP-EIGRP(Default-IP-Routing-Table:1): Neighbor 172.17.3.1 not on common subnet for Ethernet0

On Router 3 I get this:

IP-EIGRP: Neighbor 172.17.1.1 not on common subnet for Ethernet0
IP-EIGRP: Neighbor 172.17.2.1 not on common subnet for Ethernet0
IP-EIGRP: Neighbor 172.16.13.1 not on common subnet for Serial1

here is my show run on R2:

hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
!
!
interface Ethernet0
ip address 172.17.2.1 255.255.255.0
!
interface Serial0
ip address 172.16.12.2 255.255.255.0
no fair-queue
!
interface Serial1
no ip address
shutdown
!
interface Serial2
no ip address
shutdown
!
interface Serial3
no ip address
shutdown
!
interface BRI0
no ip address
shutdown
!
router eigrp 1
network 172.16.0.0
network 172.17.0.0
no auto-summary
!
ip http server
no ip classless

R2# sh ip route: 172.17.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.17.0.0/16 [90/2195456] via 172.16.12.1, 00:04:57, Serial0
C 172.17.2.0/24 is directly connected, Ethernet0
172.16.0.0/24 is subnetted, 2 subnets
C 172.16.12.0 is directly connected, Serial0
D 172.16.13.0 [90/2681856] via 172.16.12.1, 00:04:57, Serial0

R1# sh run

hostname R1
!
!
!
interface Ethernet0
ip address 172.17.1.1 255.255.255.0
!
interface Serial0
ip address 172.16.12.1 255.255.255.0
no fair-queue
clockrate 64000
!
interface Serial1
ip address 172.16.13.1 255.255.255.0
clockrate 64000
!

router eigrp 1
network 172.16.0.0
network 172.17.0.0
!
ip classless

R1#sh ip route eigrp
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
D 172.16.0.0/16 is a summary, 00:34:18, Null0
172.17.0.0/16 is variably subnetted, 3 subnets, 2 masks
D 172.17.0.0/16 is a summary, 00:09:51, Null0
D 172.17.2.0/24 [90/2195456] via 172.16.12.2, 00:09:51, Serial0

R3# show run

hostname R3
!
!
!
interface Ethernet0
ip address 172.17.3.1 255.255.255.0
!
interface Serial0
no ip address
shutdown
no fair-queue
!
interface Serial1
ip address 172.16.3.3 255.255.255.0
!
interface BRI0
no ip address
shutdown
!
router eigrp 1
network 172.17.0.0
network 172.16.0.0
!
no ip classless



R3#sh ip route eigrp
172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.16.0.0/16 is a summary, 00:39:41, Null0
172.17.0.0/16 is variably subnetted, 2 subnets, 2 masks
D 172.17.0.0/16 is a summary, 00:39:41, Null0

Ivanjam

Check the IP address on R3 Serial1.
You also have an auto-summarization issue with the 172.17.0.0/16 network.

uneeqstylezz

fixed the ip address for r3 serial 1 to 172.16.13.3
turned auto summarization off
still the same thing

uneeqstylezz

ahhh figured it out! as homer simpson would say... "doooohhhh"! lol..
i had all 3 ethernet cables plugged into all the same set of ports on a switch that was configured to be all in the same vlan.
moved each cable into different vlans and problem went away

SysnetNotes

I think that occurs when you connect ports to same switch