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[eponymous]

Hi,

I'm glad to discover that D-Link has a forum, I hope that I can finally get a solution for my problem.

I have a DIR-625 (Hardware Version: C1, Firmware Version 3.08) Wireless Router and I get my internet through an Arris CM550A Cable Modem.

I recently changed my DSL modem to the Cable modem mentioned above when I changed my internet service provider.

The problem is that my router won't stay connected to the internet through the cable modem. If I connect my laptop directly to the Arris modem with a LAN cable my internet works perfectly. However before I switched from DSL modem to Cable modem, I was also receiving the internet through my D-Link wireless router without problem. So I don't think that either of the devices are faulty.

Here are the steps that I have tried so far and have failed (some gotten from this forum):

    * Upgraded the Firmware on the router to the latest version (3.08).
    * Reset both the D-Link Router and the Arris Cable Modem
    * Disable DHCP server on the router
    * Plug the modem into one of the LAN ports on the router instead of Internet port.
    * Clone PC Mac address in the router's internet settings.
    * Reset router to factory settings and reboot.


It is also important to note that resetting the D-Link router or any change that involves rebooting the router will result in a temporary connection to the internet. But I get disconnected after 5-10 minutes and then I have to reset it again if I want temporary internet access.

Help would be greatly appreciated.

[jrjones49]

did your DSL provider have you install any software on your computer? If so try uninstalling it.

[eponymous]

There was no software installed by my DSL service provider.

Thanks anyway for you reply.

[eponymous]

I am still having this problem.

I called D-Link and the customer service agent told me that I should do the following things:

• Change my wireless channel to channel 3 in the manual wireless network setup
• In the advance network setup change the WAN port speed to 10Mbs
• In manual internet connection setup I should Change my MTU (packet size) to 1300
• Turn off cable modem and router for 2 minutes. Turn on cable modem, wait for it to fully start up, then turn on router.

I was told that this would make my network more stable, and therefore no more dropped internet connections.

But I am still having the same problem.
Help D-Link, Help!!!!!

[jrjones49]

It sounds like you had DSL before and now cable. You may want to get into your DLink router and make sure none of your DSL account info is still in there. Get rid of it and make sure your router is set up to work with cable.

Other than that it sounds like the problem started when you changed modems. Unless someone here has expertise with an Arris Cable modem the Dlink forum is probably not the place to find an answer. Suggest you contact Arris or your ISP.

[eponymous]

My router never contained any account information from my DSL ISP. When I got the router I just hooked it up to the modem and used it.

Making sure my router is set up to work with cable is exactly what I am trying to accomplish.

Contacted my ISP. They are even less helpful than D-Link (who so far have not responded to this thread).

Thanks anyway for your reply.

[jrjones49]

Sorry you're having so much difficulty. After reviewing all the steps you've taken to this point you may have a bad router. The fact that you are able to connect and it just disconnects itself points to a HW issue and not a configuration issue.

If  you can get ahold of another router somewhere and test to see if you have the same issue that would be very telling.

[FurryNutz]

Information for users with Arris ISP cable modems:

1. Arris modems seem to be notorious for not working well with external routers. One reason, some of the Arris modems already have a built in router. These modems can't be bridged like DSL modems. In some cases, and if the Arris modems Web page is accessible by a user, and if the modem has a DMZ option, a user could input the external routers WAN IP address it gets from the Arris modem into the Arris modems DMZ. This will help bypass any Arris modem management and processing and should open up everything to the external router. I have seen some cases that ISPs lock down the Arris modems web page from users. In this case I would contact the ISP and see if they can help with setting up the DMZ for use. Is some cases, changing out the Arris modem for a different mfr modem is preferred, depending upon if the ISP allow customers to bring there own modem or not and if a customer has Voice Phone services thru there ISP which requires the use of Arris modems. If any one of these options can't be resolved for using an Arris modem, then it's recommended that Dlink users either Turning a router into an AP, or connect a Dlink DAP model AP device in which these models do not have a router however provides WiFi and wired LAN connectivity to devices. These DAP models can be connected to a host based router or Modem/Router combo as seen with Arris modems and will let the ISP modem do all the routing functions rather than trying to get 2 different routers to work gether which will introduce Double NAT and causes connection problems.
DLink DAP models are some of the following: DAP-1360, 1522, 1525, 1533. Other models are available as well.


2. In some cases the Arris modems are stand alone modems with out any built in router. In some cases, most of these modems can be connected to external routers and do work well wiht out any problems. Then some cases we've seen some odd behavior between the Arris modem and external routers that seem to have no resolution. Something thats just not compatible or seems to be an ISP issue. In these cases general connections should work if the Arris modem connects to the external router. Sometimes MAC Cloning can be used on the external router to make the connection work well between the Arris modem and external router. Other troubleshooting may need to be one with the ISP. Checking LAN cabling between ISP modem and external router also helps. Cat6 is recommended. Shortest length possible is preferred. Sometimes line signal levels from the ISP service box to the customer building needs to be checked. Also using TV line splitters will lower line levels to the ISP Modem thus making the entire system not work well and makes customer think it's the routers fault when the problem lies upstream from the router and with the ISP service, lines and modem.

Over all, if you can avoid using Arris modems as your ISP modem and use something else is preferred. Motorola SB 6 Series modems are very good and work very well with DLink routers. If the Arris modem and external router are connecting and working well for you then you should be good to go. Just be aware of the above mentioned items. Check with the ISP and check here in the forums about getting some information and help. We are here to help you get it working as best as we can, however if we can't, other alternatives will need to be investigated.

Arris Cable Modems and External Routers

Good Luck.