I have a customer with 2 cisco 2600's that connect over a t1. The customer has addtrans that manage the t1 and our connected via serial v.35 ports on the 2600's. They are trying to route between to lans. The problem is that the routers see each other fine. Ping and traceroute is great between serials and ethernet ports on both the routers. Router A host's can ping across the connection to hosts on the Router B lan and get replies. Router B cannot ping back across the connection to host attached on the Router A lan side but can ping Router A's ethernet address. Below are the configs for router A and Router B.
Thank you for any help you can provide.
Router A Config
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname RouterA
!
enable secret *****
!
!
ip subnet-zero
ip routing
!
interface Ethernet 0/0
no shutdown
description connected to EthernetLAN
ip address 192.168.0.13 255.255.255.0
keepalive 10
!
interface Serial 0/0
no shutdown
description connected to RouterB
ip address 10.10.10.2 255.0.0.0
encapsulation hdlc
!
ip classless
!
! IP Static Routes
ip route 172.168.1.0 255.255.255.0 10.10.10.1 1
Router B Config
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname RouterB
!
enable secret ****
!
!
ip subnet-zero
ip routing
!
interface Ethernet 0/0
no shutdown
description connected to EthernetLAN_1
ip address 172.168.1.1 255.255.255.0
keepalive 10
!
interface Serial 0/0
no shutdown
description connected to RouterA
ip address 10.10.10.1 255.0.0.0
encapsulation hdlc
!
!
ip classless
!
! IP Static Routes
ip route 192.168.0.0 255.255.255.0 10.10.10.2 1
