Question about Arris WR850GP Router

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XBox 360 not compatible with Motorola WR850G

Can't get xbox 360 to connect to xbox live, the connection test fails at MTU, wired or wireless. My WR850G (not on Microsoft compatible lsit) doesn't allow me to change that, except when using PPPoE, which isn't applicable to my cable provider.

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  • truegamer44 Dec 29, 2007

    I have the same exact problem. Any help?

  • wishbar Dec 29, 2007

    I have latest firmware (6.1.4), but it started working after cycling power to the router and cable modem.

  • Anonymous Jan 08, 2008

    I also am experiencing this problem. When I set the router for PPPoE, I lose my internet connection. Please Help!

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Motorola WR850G router may fail to connect to xbox live after update to firmware 6.1.4. I was able to correct the problem. My solution was
Go in xbox >> network config >> IP and use Static option. Set the xbox to an IP in the range allowed by your router configuration. The router IP config range is found in the router config web >> Lan section. Then I set my router config >> Routing >> DMZ IP Address setting to the xbox ip I just assigned to my xbox. Restart router using the restart button on the Basic page of router config. Restart your xbox and attempt to login to xbox live. This solved my problem.

As a side note, on the xbox networking test page, the xbox live status message will allows show they are aware of a problem with xbox live login. This is a lie. For that reason I postponed trying to fix my router problem thinking it was an xbox issue, it is not. Once you finally connect to xbox live you will still notice this incorrect message remains. Microsoft developers ****...

Posted on Sep 14, 2009

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I am surprised that you are having this problem. I own the WR850G and I have no problems connecting to xbox live. I have my router connecting to the dsl modem using pppoe. And the router is set to allow any other devices connecting to the router to use dhcp. Note that I have my xbox 360 using dmz from the router's settings. Even though I had it at one time not using dmz, it was still going on xbox live. Maybe you need to update the firmware in your router. I know mine has the most up to date firmware released.

Posted on Dec 29, 2007

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1 Answer

I have a Motorola WR850G router which works just fine for broadband internet access for our laptop and our desktop. We are trying to connect xBox Live and we are getting an error message that Maximum...


Starting on page 3-3 of the WR850G user manual, there is a setting for "PPP MTU".
Whether or not this will change the overall MTU of the router is not clear. Apparently the default setting is "0", which I would guess is automatic. I would try changing the setting to 1500 and work your way down from there until xbox live is hopefully satisfied.
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I posted a solution under a different problem, but similar. Basically you will need to pick a static IP for your xbox. Then set that IP address in the router web config >> routing >> DMZ IP address setting. Restart both router and xbox and bingo. Your xbox is now directly connected to your cable modem without the router problems preventing connectivity.

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Access the routers setup page by typing 192.168.1.1 (ip address of the router) on the address bar on IE.

then on basic setup page at the bottom part of the page you will see MTU normally its on auto,
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This site has good information relating to connecting your xbox 360 to xbox live wirelessly with laptop or modified router and improving xbox live NAT rating:

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MTU stands for "Maximum Transmission Connection". Some routers and/or network gateways are incompatible with Xbox LIVE, while others may be compatible but merely need to have a setting changed. If you compare your router to the list of routers at the following web address, you can confirm whether or not your hardware has been confirmed as compatible with Xbox LIVE by Microsoft:

http://www.xbox.com/en-US/support/connecttolive/xbox360/homenetworking/equipment.htm

Whether or not your hardware is listed as compatible, it would still be a good idea to check your instruction manual for the hardware you are using and see how (if possible) to change the MTU settings. Microsoft suggests that the MTU setting should be 1364. Using untested hardware or hardware not listed as compatible may still work, however, future updates to LIVE may suddenly make your hardware incompatible, as updates to LIVE and the Xbox console are made to work with the specifications of tested and listed compatible routers and gateways.

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All of the documentation and firmware updates for Motorola's discontinued products are available in their Discontinued Products section which is here:
http://broadband.motorola.com/consumers/support/default.asp?supportSection=DiscontinuedProducts
Hope this helps. Otherwise repost with specifics and I will activate my second brain cell for your service:) Steve Medley

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for some reason i cant connect to live, it says that my mtu has failed. any surgesstions how i solve this??

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