Arris SURFboard SBG900 Wireless Router (DHSBG900) Logo
Posted on Feb 17, 2009
Answered by a Fixya Expert

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Surfboard Cablemodem not communicating with Belkin Wireless Routr

Ok Simple setup here. One ethernet cable from the cable modem to the WAN port on the belkin wireless router. The Belkin Wireless Router has 4 additional ports, which I connect another ethernet cable to it. That line goes to a 10/100mbp 8 port HUB wich of course brances out to the system systems on my net work. This is the way you are suppose to do it. takes less than what 5 to 10 minutes. Comcast modem has no settings you can configure, it has a MAC address stored in the memory. The Wireless router will not talk with the modem or vice versa. This 6 hour job has gotten me nowhere. I need to get the Cable modem to talk to the router which will spit out DHCP addresses. Issue is the Cable modem acts as a DHCP server too. Even when I turn DHCP off on the router's side, nothing.

  • 12 more comments 
  • kstimac Feb 17, 2009

    comcast is spitting out DHCP addy's like 192.168.100.10

    Would I need to create a static IP address using simular numbers. Cause I tried commecting the cable modem to Port#2 on the wireless router after turning off DHCP on the router. Nothing.

  • kstimac Feb 17, 2009

    I will try that. Thanks..

  • kstimac Feb 17, 2009

    Another thing came to mind. If the comcast modem has a Static IP, and the modem is acting like a DHCP server. Would I need to enter in the Static IP from comcast into the router??

  • kstimac Feb 17, 2009

    I tried that. Without using a router just a straight 8 port 10/100 hub I received 169.address. nothing anywhere near 192.168. here's the kicker..IF, I disconnect the other PC's lan cables from the hub, my PC will have internet. Once I start connecting more PC's I loose the connection. Thats why I firmly believe Comcast has my main PC's mac addy stored and I can't add anymore PC's to the connection...

  • kstimac Feb 17, 2009

    Thats what I thought at first...I checked the settings ( well the ones I can look at ) there are no means and ways for me to change setting on my Surfboard Modem. But ih the Connection settings it states DHCP = on

  • kstimac Feb 17, 2009

    192.168.100.1 is the IP to get in...The only options I can actually use is Reset the Modem and reset modem to Factory settings.

    No other options or settings I can mess with, its like pre-set, no changes can be made...

  • kstimac Feb 17, 2009

    This is what I found out from a forum on the net...Seems to be Accurate.



    "Comcast has a little known "trick" that they use when setting up users. Here's how it works:

    When Comcast first comes to setup your new cable modem service, they insist on connecting it to your computer and "testing" it. Most people think nothing of it, and that it's good customer service ...truth be told, what they are doing is attaching your computer's MAC address to that cable modem, so that you cannot create a wireless network. This is because they want you to pay them $150 to do this for you."



    Sound bout right??

  • kstimac Feb 17, 2009

    "Ghost the MAC address within the router?"

  • kstimac Feb 17, 2009

    I think I would need a modem that I can adjust settings...

  • kstimac Feb 17, 2009

    Belkin Wireless G F5D7230-4

  • kstimac Feb 17, 2009

    I hope so...I have a Recording Studio to run..We have a band coming in that wants to do a live POD cast. I had DSL and it lagged, choppy video. Figured Comcast with 20mbps would be the best option. Course that hasn't been the case yet..



    This is me BTW



    www.myspace.com/gavincountry



    I also work as an

    Micro Computer / Network Tech II
    DCSE, MCP, and A

    For a publishing house Down town Nashville

  • kstimac Feb 17, 2009

    Been there, printed the manual

  • kstimac Feb 17, 2009

    Been there, printed the manual

  • kstimac Apr 09, 2009

    Trashed the Wireless Belkin and got a Linksys 4 port/ DSL/CABLE Router "WIRED"

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2 Answers

Anonymous

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  • Posted on Mar 02, 2009
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Find out what the subnet of the current router you want to connect the wireless router to. your isp router probably has 192.168.1.1 something similar, which will give out ip addresses of 192.168.1.100-192.168.1.254, change the belkin routers internal ip address to 192.168.2.1 and turn off dchp server, that should solve your problems, save settings, power down belkin router then power back on.

  • Anonymous Mar 02, 2009

    Also, do not plug ethernet cable into the wan of the belkin router, what you want is an access point now, since you already have a router which is handing out dchp addresses. plug the ethernet cable from an open port on the isp router and plug the other end into port 1 on the belkin router.

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Ricky Ostrom

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  • Posted on Feb 17, 2009
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If the modem is actually passing out DHCP, then you have to connect the modem to the router 4 port lan side and not the wan port. Give the router a static ip like 192.168.1.2 and you can talk to it and configure the wireless features.

  • 14 more comments 
  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    If it is actually passing out addresses in the 192.168.100.xxx range, then set the router as I explained with an address like 192.168.100.2 and the router will function like an access point. If the modem is not passing out addresses, but there is an address conflict in the range 192.168.xxx.xxx then set the router to 10.10.0.1 and pass out dhcp in the range of 10.10.0.xxx with submask 255.255.0.0

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    Router will pickup the modem ip automatically. If the modem is handling dhcp then without the router, the modem can connect to the hub/switch and bring all the computers online. You can try this and see what addresses get assigned to each computer via IPCONFIG /ALL

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    I have Comcast and my modem does not handle DHCP.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    What make is the router?



  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    Ok, put the modem back on the router wan side and UNPLUG power for 15 minutes. Turn on router DHCP. Set router to Auto Configuration DHCP. Set local ip address to 192.168.1.1 and 255.255.255.0 Enable DHCP Server and start ip addresses at 192.168.1.100 with about 50 users. Do not set DNS, since it will be automatically passed. more to come

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    According to Motorola's documentation, the modem can handle up to 52 ip addresses, but they have to be purchased. So the router is needed. You should be able to program the modem thru the browser with it's ip address.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    Typo correction 32, not 52.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    With the modem connected to the router thru wan. Within the router console under Status can you see the modem settings (i.e. Domain, DNS, IP)

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    They check the MAC address for security. Normally, if you disconnect the power on the modem for about 15 minutes and reconnect, it will be rescanned and the MAC address will reset. If not, you can call them to reset the modem. Otherwise, if you know which computer the modem was originally on, you can ghost the MAC address within the router.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    Also known as cloning the MAC address.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    WHAT MAKE IS THE ROUTER???

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    You can get this going. It's either an ip conflict, MAC security, or DNS issue.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    Go back to the basics. Connect the computer to the modem and confirm connection. Write down MAC Address of computer via IPCONFIG /ALL . Connect modem to wan of router and computer to router. Set router as previously mentioned: "Turn on router DHCP. Set router to Auto Configuration DHCP. Set local
    ip address to 192.168.1.1 and 255.255.255.0 Enable DHCP Server and
    start ip addresses at 192.168.1.100 with about 50 users." In router Clone MAC Address you wrote down. Check PC to see if it picked up new ip from router and check router status to see if it picked up ip from modem.

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    You have probably been here already, but here is the support sight for that rotuer. http://www.belkin.com/support/product/?l...

    It's suggested to update the firmware.


  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    The Belkin router is suggesting you set the ip for 192.168.2.1 and pass out 192.168.2.xxx

  • Ricky Ostrom
    Ricky Ostrom Feb 17, 2009

    I have to go for now. I'll check back on progress.

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