Cisco IDSL Modem Config

NeTrack does not support the Vangard modem for use with its IDSL service.

Cisco 800 series router/modem setup

1. Connecting the cables

2. Configure router for IDSL

3. Configure internal network for DHCP and NAT

4. Configure static IP addresses

Connecting the cables

Connect the red IDSL cable between the IDSL port on the Cisco to the IDSL wall jack provided by Qwest.

Conntect the yellow ethernet cable between an ethernet port on the Cisco to an ethernet port on your local PC.

Connect the blue cable between the console port on the Cisco and a serial port on your PC using the DB9 adapter. If you have a Macintosh, you may need an adapter cable not included with the router.

Plug the Cisco power cable to a power outlet and turn the Cisco router on.

The following three lights should be on before proceeding:

Power
Ethernet Link
NT1 or Line

Configure Router for IDSL

Do not use the Fast Step application to configure this router. On your PC, use the serial port to access the console of the Cisco router. On a Windows PC, use the Hyperterm application or something equivalent.

Once connected to the console of the router, enter the following commands. Use the IP address NeTrack assigned to you in place of "N.N.N.N." Enter a password you will remember in place of "MYPASSWORD." Be sure to remember the password or write it in a safe place. You can not re-configure the router without it.

router> enable
Password:
router# config t
router(config)# enable password 7 MYPASSWORD
router(config)# isdn switch-type basic-5ess
router(config)# isdn leased-line bri0 144
router(config)# interface bri0
router(config-if)# ip address N.N.N.N 255.255.255.240
router(config-if)# encapsulation ppp
router(config-if)# exit
router(config)# ip routing
router(config)# ip route 0.0.0.0 0.0.0.0 bri0 
router(config)# no interface dialer1
router(config)# exit
router# write

It is not necessary to reboot the router following configuration.

Configure Internal Network for DHCP and NAT

Again from the enable prompt of the Cisco router, use the following commands to configure the internal local network for private addresses using DHCP and NAT. Use the IP address of your DNS servers in place of "X.X.X.X" and "Y.Y.Y.Y."

router# config t
router(config)# interface ethernet0
router(config-if)# ip address 192.168.1.1 255.255.255.0
router(config-if)# ip nat inside
router(config-if)# exit
router(config)# ip dhcp pool DHCPpoolLAN_0
router(dhcp-config)# network 192.168.1.0 255.255.255.0
router(dhcp-config)# dns-server X.X.X.X Y.Y.Y.Y
router(dhcp-config)# default-router 192.168.1.1
router(dhcp-config)# exit 
router(config)# interface bri0
router(config-if)# ip nat outside
router(config-if)# exit
router(config)# exit
router# write

Configure static IP addresses

Follow this step only if you requested and were provided global static IP addresses. Again from the enable prompt of the Cisco router, use the following commands to configure global static IP address mappings to local private IP addresses.  You may need to adjust the DHCP pool so that it doesn't make overlapping assignments. Use the internal local IP in place of "L.L.L.L" and external global static IP in place of "G.G.G.G." Refer to documentation on the www.cisco.com web site for information on more features and how to configure more complex situations.

router# config t
router(config)# ip nat inside source static L.L.L.L G.G.G.G
router(config)# ip nat outside destination static G.G.G.G L.L.L.L
router(config)# exit
router# write

Repeat the above configuration for each mapping of global static IP to local private IP.