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Router to Modem compatibility

Last response: in Wireless Networking
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March 12, 2013 10:35:09 AM

I have a D-Link DIR-825 wireless router. Charter just installed a Cisco DPC 3008 modem and the man doing the installation for Charter could not get to modem and the router to pass the signal. The modem handles a max of 100 meg a second. The router supports two bands (2.4GHz and 5GHz). Are there any known compatibility issues here?
March 12, 2013 10:51:26 AM

You have not set it properly. It will work fine once you do it. If your Cisco is online and working properly do following. Check Cisco's local IP adress. Enter D-Link setup. Click Setup - Manual Internet Connection. Select Static IP. Enter IP adress (if Cisco's local is 192.168.1.1 then here type 192.168.1.2), subnet 255.255.255.0. Default Gateway (Cisco's local IP). DNS server type Cisco's local IP or DNS of your provider. Click SAVE SETTINGS. Connect CISCO ethernet port to D-LINK WAN port and you should get your Cisco's Internet to D-LINK.

Also you can set D-LINK to be in local network with CISCO if you need one PC to be connected directly on CISCO router.

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March 12, 2013 10:53:11 AM

Also you should make sure that D-LINK local network IP range is not in range of CISCO. Change it to 192.168.10.1 for example.
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March 12, 2013 11:25:19 AM

If you PC works but the router does not this is likely the mac address issues with cable modems. You can set your router to spoof the PC mac address on wan port. In many cases you can just turn off both the router and the modem. Then after a couple minutes turn on the modem let it come up then turn on the router. It should then accept and use the mac address of the router.

What you have is a true cable modem not a modem/router. It should be completely transparent to you.
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March 12, 2013 11:45:09 AM

Mwill99 said:
I have a D-Link DIR-825 wireless router. Charter just installed a Cisco DPC 3008 modem and the man doing the installation for Charter could not get to modem and the router to pass the signal. The modem handles a max of 100 meg a second. The router supports two bands (2.4GHz and 5GHz). Are there any known compatibility issues here?


The Cisco DPC 3008 is a standard cable modem - you will need to connect the ethernet cable from the Cisco DPC 3008 (only 1 ethernet port) to your WAN port of your D-Link DIR-825. You should then connect your PC with another ethernet cable to any of the available ports on the D-Link DIR-825. Try to connect to the D-Link DIR-825 by opening up any browser and typing in 192.168.0.1 - default username is admin, password is blank.

Sometimes the setup of the router may require you to reset the D-Link DIR-825 to factory defaults here are the instructions:

D-Link Router reset
Step 1 Locate the reset pinhole on the back of the unit.
Step 2 With the unit powered on, press and hold the Reset button.
Step 3 Hold the Reset button for about 10 seconds.
Step 4 Release the Reset button.
Step 5 The unit will reboot. Allow 20-30 seconds before reconnecting.
Step 6 The device is now at factory defaults.
Note: Do not recycle power during the reset procedure. The default user name for most D-Link devices is admin and the password is left blank.
When it says hold for about 10 seconds, don't hold for more than ten seconds or the procedure will likely fail, if ten seconds doesn't work try 5 seconds.

If you still aren't connected, check and make sure your PC is using automatic settings to connect to the D-Link DIR-825 (IP configuration).

Once you get connected, make sure to setup your wireless settings so that you are secure.
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