cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
396
Views
5
Helpful
1
Replies

IP-EIGRP: Neighbor not on common subnet & load-sharing

mdhop
Level 1
Level 1

I have two routers connected via load-sharing PVCs. IP (other that

EIGRP) between the 2 routers works fine. The IP addresses of the

"connected" interfaces (& EIGRP peers) are correctly subnetted & in

the the same subnet. However, I get the following error message on

the remote "IP-EIGRP: Neighbor 192.168.215.82 not on common subnet for

Serial0/1:0.101".

Remote---S0/0:1.101---Telco---ATM1/0.15---Host

Remote S0/0:1.101 = 192.168.215.85 255.255.255.252

Host ATM1/0.15 = 192.168.215.86 255.255.255.252

Here's a config snippet:

---------------------------------------------

Host

!

interface ATM1/0.14 point-to-point

ip address 192.168.215.82 255.255.255.252

ip load-sharing per-packet

pvc 25/333

!

interface ATM1/0.15 point-to-point

ip address 192.168.215.86 255.255.255.252

ip load-sharing per-packet

pvc 25/334

!

router eigrp 139

redistribute connected

redistribute static

network 10.0.0.0

network 172.16.0.0

network 192.168.215.0

no auto-summary

no eigrp log-neighbor-changes

!

---------------------------------------------

Remote

!

interface Serial0/0:0.101 point-to-point

ip address 192.168.215.81 255.255.255.252

ip load-sharing per-packet

frame-relay interface-dlci 101

!

interface Serial0/1:0.101 point-to-point

ip address 192.168.215.85 255.255.255.252

ip load-sharing per-packet

frame-relay interface-dlci 101

!

router eigrp 139

redistribute connected

redistribute static

network 10.0.0.0

network 172.16.0.0

network 192.168.215.0

auto-summary

no eigrp log-neighbor-changes

!

1 Reply 1

vcjones
Level 5
Level 5

Sounds like your service provider has mapped the PVC on ATM1/0.14 to the PVC on the line on Serial0/1:0.101.

This could be because you have the lines coming into the two serial ports reversed or because your service provider made a mistake. I'm inclined to suspect the former :-)

You may be able to verify this by doing a "show cdp neighbor" (assuming you have not disabled CDP). A "show frame-relay pvc" on the remote router would also be informative.

Good luck and good hunting!

Vincent C Jones

www.networkingunlimited.com