Having trouble pinging through my routers

[kozmonot28]

I'm a little confused on this one.

I have a pair of Cisco 2811 router each with a VWIC2-2MFT-G703 cards in them. I have them connected back-to-back by way of a T1 crossover cable. That all seems to be working fine.

My issue is that the network seems to inconsistant. I've got issues where I can ping in one direction but not the other. Let me try to explain it.

Router 1 is has FE0/0 plugged into my LAN. S0/0/0:1 is crossed-over to S0/0/0:1 on Router 2. FE0/0 is plugged into a LAN on the other end. I have a device plugged into the far end LAN.

From my desktop I can ping everything including the device on the far LAN. Same thing with Router 1 and the device on the far LAN. The issue is with Router 2. From there I can ping Router 1 and the device on the far LAN.

I don't have connectivity issues, but this pinging thing bothers me.

ROUTER1#show run
Building configuration...

Current configuration : 1197 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ROUTER1
!
boot-start-marker
boot-end-marker
!
card type t1 0 0
no logging console
enable secret 5 $1$37J1$j08sgcLOlHWEmjT2YfgR51
enable password 7 045C19030A2F58461C1407
!
no aaa new-model
!
resource policy
!
no network-clock-participate wic 0
ip subnet-zero
!
!
ip cef
!
!
!
!
!
controller T1 0/0/0
framing esf
fdl both
linecode b8zs
channel-group 1 timeslots 1-24
description t1 to Chandigarh
!
controller T1 0/0/1
framing esf
linecode b8zs
!
!
interface FastEthernet0/0
ip address 172.16.1.46 255.255.255.0
duplex full
speed auto
no cdp enable
no mop enabled
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
no cdp enable
!
interface Serial0/0/0:1
ip address 172.16.2.17 255.255.255.252
fair-queue
!
ip classless
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
ip route 172.16.11.0 255.255.255.0 172.16.2.18
!
no ip http server
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
password 7 0003010301551F0E1A2C4E
login
!
scheduler allocate 20000 1000
no process cpu extended
no process cpu autoprofile hog
!
end


ROUTER2#show run
Building configuration...

Current configuration : 1222 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname ROUTER2
!
boot-start-marker
boot-end-marker
!
card type t1 0 0
no logging console
enable secret 5 $1$kxg5$ioJCavTrMbHTIUg0I9yTi1
enable password 7 0303490E030135445B041B
!
no aaa new-model
!
resource policy
!
no network-clock-participate wic 0
ip subnet-zero
!
!
ip cef
!
!
!
!
!
controller T1 0/0/0
framing esf
fdl both
linecode b8zs
channel-group 1 timeslots 1-24
description T1 to Lburg
!
controller T1 0/0/1
framing esf
linecode b8zs
!
!
interface FastEthernet0/0
ip address 172.16.11.1 255.255.255.0
duplex full
speed auto
no cdp enable
no mop enabled
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
no cdp enable
!
interface Serial0/0/0:1
ip address 172.16.2.18 255.255.255.252
!
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.2.17
ip route 172.16.1.0 255.255.255.0 172.16.2.17
ip route 172.16.50.0 255.255.255.0 172.16.2.17
!
no ip http server
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
password 7 08265E4B0C17111F07060E
login
!
scheduler allocate 20000 1000
no process cpu extended
no process cpu autoprofile hog
!
end

 

[kozmonot28]

I found the issue. The Router for 172.16.1.1 didn't know how to route back to 172.16.2.18.

Its working now.