ICND2 - Trouble shooting basic Access-Lists

Node Man

Hi Everyone,
Using GNS3, which i think i have gotten to run stable. I am trying to use a basic access list. It is a small EIGRP network with a frame-relay switch in the middle of 4 routers. Short story, a single router on one end has an access list meant to deny network 172.16.0.0, but it seems to block everything. When trying to ping from 10.0.0.0 i get "UU.U" instead of "!!!!!" or ".....".

Here is the access list: access-list 1 deny 172.16.0.0 0.0.0.255

Please advise.

Thanks,
Node

Below is a chunk of the routers config:



interface Serial0/0
description Connects to Router 1
ip address 11.0.0.30 255.255.255.0
ip access-group 1 in
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
router eigrp 1
network 10.0.0.0 0.0.0.255
network 11.0.0.0 0.0.0.255
auto-summary
!
no ip http server
no ip http secure-server
!
ip route 11.0.0.0 255.255.255.0 Serial0/0
!
!
access-list 1 deny 172.16.0.0 0.0.0.255
!
!
!
control-plane

atorven

At the bottom of every access list is an implicit deny any statement (anything not allowed is denied) - add a permit all statement after your deny statement.

Node Man

That worked. Thank you!