05-19-2004 05:28 PM - edited 03-02-2019 03:49 PM
We have a new dedicated full T1 line to another office location. That location has an internet line. We'd like to connect our two Cisco 1700s together over this T1 line so both offices have an internet connection. However, I'm having major difficulty trying to do this. The router configs are:
Office Site (without the internet connection, just the T1 line to the other location):
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname office
!
boot-start-marker
boot-end-marker
!
enable secret xxxx
enable password xxxx
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
no ip routing
no ip cef
!
!
!
no ftp-server write-enable
!
!
!
!
interface FastEthernet0
description Office Network
ip address 192.168.1.1 255.255.255.0
no ip route-cache
speed auto
!
interface Serial0
description T1 connection to other office site
ip address 10.0.0.1 255.255.255.0
encapsulation ppp
no ip route-cache
!
ip classless
ip route 0.0.0.0 0.0.0.0 10.0.0.254
no ip http server
!
!
line con 0
line aux 0
line vty 0 4
password xxxxxxxxx
login
!
!
end
The other site, with the internet connection looks like:
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname colo
!
boot-start-marker
boot-end-marker
!
enable secret xxxx
enable password xxxxxxxxxx
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
no ip routing
no ip cef
!
!
!
no ftp-server write-enable
!
!
!
!
interface FastEthernet0
description To Internet
ip address 192.168.0.254 255.255.255.0
no ip route-cache
speed auto
!
interface Serial0
description T1 Line from Office Location
ip address 10.0.0.254 255.255.255.0
encapsulation ppp
no ip route-cache
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.0.1
no ip http server
!
!
line con 0
line aux 0
line vty 0 4
password xxxxxxxxxx
login
!
!
end
===================================
The two routers cannot ping each other. Any ideas why?
05-19-2004 07:00 PM
Do you use external CSU/DSU or the internal one (WIC-1DSU-T1? Do you see any alarm lights on the T1 CSU/DSUs, smartjacks ? You should set one end of the T1 line to clock source internal. (while the other end is set to the defaults -> clock source line)..
This setting can be changed on either the external CSU/DSU, or if you use a internal CSU/DSU (WIC) - this parameter can be changed using an IOS command.
Where is the internet T1 terminating at the second site ? Is it on a separate router ?
05-19-2004 09:36 PM
You need to enable ip routing on both of the routers. You have the command "no ip routing" entered on both of them.
05-20-2004 05:15 AM
I agree that turning on ip routing is important. But I would like to understand better the comment about the routers could not ping each other. I understand why the routers would not be able to ping the other routers Ethernet. But if the router can not ping the serial interface address, then it is not an ip routing issue, because you should be able to ping devices on a connected subnet.
Can we verify which addresses you were pinging when it did not work?
And can we get the results of show int on both of the routers?
05-20-2004 06:02 AM
The ends of the T1 are smart jacks. What is the command for changing the clock source ? I'm looking, but not finding it.
05-20-2004 12:45 PM
For internal CSUs:
conf t
int s0
service-module t1 clock source ?
What does sh int s0 show on both routers?
-HTH
05-27-2004 11:11 AM
hi
What about the cabling from the smart jack to the router?
Have you checked/replaced them
thanks
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