Help Needed with 1603 routers

[scrimmy]

Pardon my ignorance with these questions, but I am a complete newbie to routers.
I have been asked to set up a network link to a remote office using a kilostream private circuit with two Cisco 1603 routers with WIC-1T interface cards.
The host site is to have an IP address of 172.31.xxx.xxx and the remote site to have an IP address of 172.16.xxx.xxx
To simulate the WAN link I have a DTE-DCE cable (CAB-DB60-DB60)
This is where I need the help:
I can not get the two routers to see each other – can someone please offer a sample config.
Also when I save my configs with “write memory” and reboot the router, the rooters revert back to the “System Configuration Dialogue” as if first switched on, thus losing any configs I have entered.

Thanks in advance

 

[scrimmy]

Ignore my second question above have figured that one out, was using wrong config register.
Just need to get routers talking to each other now.

Thanks

 

[ChrisAC]

What IP addresses do you have on the serial ports? Is the line protocol up? Can you post the configs?

Chris.
************************
Chris Andrew, CCNA
chris@iproute.co.uk
************************

 

[jeter]

setup your WAN interfaces with ips, something like this.
router1
ip address 192.168.1.1 255.255.255.252

router2
ip address 192.168.1.2 255.255.255.252


“Reserve your right to think, for even to think wrongly is better than not to think at all”

Fisher CCNA

 

[marks66]

When you connect 2 routers back to back with DTE&DCE you have to turn keepalives off, then the link should stay up.

An easy way to configure a point to point leased line is to use ip unnumbered.

EG Config for both ends could be.


Serial 0
ip unnumbered eth0

Ip Route 0.0.0.0 0.0.0.0 Serial 0

Cheers

Mark

 

[scrimmy]

Have posted both router configs below. Tried all above advice, still no joy.
I am sure that I am missing something so simple.

Thanks

Host router config

Using 574 out of 7506 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname routerA
!
enable secret
enable password
!
ip subnet-zero
!
!
!
interface Ethernet0
ip address 172.31.11.10 255.255.255.0
no ip directed-broadcast
!
interface Serial0
ip unnumbered Ethernet0
no ip directed-broadcast
!
interface BRI0
no ip address
no ip directed-broadcast
shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
!
!
line con 0
transport input none
line vty 0 4
password
login
!
end


Remote router config

Using 576 out of 7506 bytes
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname routerB
!
enable secret
enable password
!
ip subnet-zero
!
!
!
interface Ethernet0
ip address 172.16.157.250 255.255.255.0
no ip directed-broadcast
!
interface Serial0
ip unnumbered Ethernet0
no ip directed-broadcast
!
interface BRI0
no ip address
no ip directed-broadcast
shutdown
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
!
!
line con 0
transport input none
line vty 0 4
password
login
!
end

routerA#sh ip int brief
Interface IP-Address OK? Method Status Protocol
BRI0 unassigned YES unset administratively down down
BRI0:1 unassigned YES unset administratively down down
BRI0:2 unassigned YES unset administratively down down
Ethernet0 172.31.11.10 YES NVRAM up up
Serial0 172.31.11.10 YES unset up down

 

[croxo]

You need to configure the DCE serial interface with a clock rate value. To confirm which is DCE your can use the show controllers serial0 command.

config t
interface s0
clock rate <value>

Valid clock rates below

1200, 2400, 4800, 9600, 19200, 38400
56000, 64000, 72000, 125000, 148000, 500000
800000, 1000000, 1300000, 2000000, 4000000, 8000000

 

[scrimmy]

Many thanks for that, done
int ser0
clock rate 2000000

on the DCE interface and all OK now.
When I take the routers to site do I need to remove the clock rate??

 

[Rucus1]

Yes you do. Your csu/dsu is going to either generate the clock for the router or it will extract it from the T1.