Plugged in an ARRIS Modem to a Linksys switch and can only get 1 computer to obtain a valid IP Address. Have reset the modem several times with no success.

please do the following:

First, click the Start Menu, and select Run. Next, type ''cmd'' into the box and click the ''OK'' button. Finally, at the prompt, type ''ipconfig'' and information about your IP Address will be displayed.
If doesnot get the IP, reset the Modem ,disconnect the power cord by 40 seconds, and then with small pencil erase click the small button , for add reset. and try again. If the problem is fixed good. If not please open network connection, select the network troubleshooting and fix it.
God bless you

Step 1: Plug the computer (ethernet wired) directly into the modem. Power cycle the modem and when all the light come on you should have internet. If not call your ISP to trouble shoot.

At this point we should be able to determine if it is a PPPoe connection (needs username and password to connect) or if it logs in automaticly.

Step 2: Plug the router back into the modem and the computer plugged wired (ethernet) to the router. Remove power from both the modem and the router. Plug the modem back in first, once all the lights are on plug in the router. Try to connect.

Step 3: Log in to the router via its IP address (normally 192.168.1.1), if no one has reset the user name password it should admin for both. If it has been reset, you will need to know what the user name and password are to continue.

Step 4: Under setup if in step 1 you found you needed PPPoe, then you need to set that under the setup tab. Make sure you use the user name and password provided to you by your ISP. If you dont need PPPoe then make sure this is set to obtain IP automaticly.

Step 5: save settings. Once the router restarts, try to connect again.

If these step do not work, let me know:

1. who is your ISP?
2. What modem do they use?
3. What is your IP address when plugged directly into the modem?
4. What is your IP address when plugged into the router?

I will be around for about 1 more hour, its 2PM central time now.

make sure that your router is acting like a DHCP server.
also make sure that your pc's ip is set to "obtain automatically" under local area connection->properties->internet protocol->properties

Do you have a cable connection kyle? i think you're using a vista operating system. Click on START, in start search bar type CMD then you'll see the command prompt as a search result. Right click and run as administrator. When you have command prompt, try to ping any website, for example www.yahoo.com. if you're able to ping yahoo that means your connected. If not do IPCONFIG, check your IP address and call your ISP, ask them if its a valid IP that they're giving out.

This would normally mean that you have assigned the IP address manually but have also given that same IP to another computer and they are fighting about it.

If this is the case then just check your IP allocations and find out which computer is using the same IP and change it to one that is not in use.

It may also mean that your router is trying to use the same IP as your modem

With just your modem connected to the computer

go to the START MENU / RUN then type CMD and press enter.

Now in the black screen type IPCONFIG /ALL

Take note of the numbers esp in the default gateway, that is your modem)

Now with just the router connected by wire do the same thing.

This time the default gateway is your router if it is the same as your modem then you need to alter it in your router,

You haven't given a model so you will have to work this bit out yourself but your are looking for a setting on your router that starts with the same number you got.
If your default router gateway was lets say 192.168.1.1 then that is what you would be looking for. Change the third block so now it reads 192.168.2.1 and save the settings. This would clear any conflict between modem and router.

If you have assigned IP's to computers they would need to be changed to reflect the routers new IP and again you would just change the third block in the allocated IP to a 2

If in doubt read this a couple of times or print it out.


If this information was of any use please click below

You will need to purchase a router my friend. The arris does not have a DHCP server built in and cannot assign IP addresses to the work stations. The only way that could work is if you ISP provided you with a second IP address, which would also be extremely unsafe from a security standpoint. Any wireless router should do the trick.

Hello,

First, I would try resetting the modem by unplugging for 10 seconds or so and then plugging it back in. To be on the safe side, I would also reboot computer. AFter that, I would try to see if it picks up valid ip address. If it doesn't, you may need to call your cable internet provider and perhaps get the mac address of your modem in their system (if it's not already)

Dman

1).turn off the modem and the router.disconnected from the Internet ISP. and the computer.
2).disconnect the router from the modem.
3).turn on the modem.
4).connect the router to the modem, and turn on the router.
5).connected the computer to the router, adn turn on the computer.
if you are using wireless, waited about 5 minutes before turning it on.
goto control panel>>wireless network, and configure the wireless seting.

It is the MAC address that needs to be scrubbed from the modem.

power off the desktop, power off the modem, unplug the data cable from the modem, unplug the POWER connection to the modem.

WAIT 3 MINUTES

Connect power to modem, let it reset
Connect data cable to Modem
power on computer

Modem should now connect & work with desktop.

Each time you switch between systems, you may have to do this. More than enough to make me buy a router. =)

Please rate the post. =)

You router may be set to be DHCP enabled so that it allocates the ip addresses automatically to each pc, so check that the pc's network card with connection problems is set in the properties on the TCP/IP line is set to obtain an ip address automatically. You can also try, Start>run then type ipconfig /flushdns to clear the pc ip address and dns. and restart pc. Lastly if you pc is both network cabled and wireless, ensure one or the other is dissabled as this can confuse the ip adress alocation.