Urgent: IP address trouble -- advanced

By Dougernaut
Jul 21, 2006
  1. Hello there, everyone.

    My friend is having some problems with his internet, and unfortunately he's blaming me since I was at his house using it. Anyway, I tried to tell him over the phone to do a ipconfig release/renew combo, but he says nothing comes up. He advocates on the fact he's also tried to unplug his modem and plug it back in and stuff. I'm going to be going over there tomorrow after work and I was curious if anyone knew any other methods for releasing and renewing an IP address for broadband (I'm pretty sure it's static). I would enter it in manually but I don't know what his subnet masks, dns servers or IP combos are.

    Thanks in advance.
  2. howard_hopkinso

    howard_hopkinso TS Rookie Posts: 24,177   +19

    Hello and welcome to Techspot.

    I don`t know if this`ll help, but it`s worth a try.

    Click start/run and type cmd. At the command prompt type "ipconfig /all" without the quotes. Note the space after the ipconfig command. Then, type exit.

    Regards Howard :wave: :wave:
  3. Rick

    Rick TechSpot Staff Posts: 4,573   +65

    Well, my own personal troubleshooting might consist of finding out what's to blame - the router (if you have one) or the modem. Things I might look for are a DSL service light, everything is plugged in / connected properly and the router's status page lists a valid IP, subnet and DNS values. Many routers offer a way to ping Internet sites etc.. Which can be useful in determining where the problem begins.

    If you have a router and it can successfully make external connections, then the computer is probably to blame. A damaged winsock is a possibility, as well as a number of other things such as drivers or wireless issues...

    If you don't have a router and you can't negotiate a connection to the Internet, there's a lot of possible variables - epecially since you don't know specifically how it should be set up - and your ability to troubleshoot based on process of elimination will be limited.

    Assuming you mean, then we know his DHCP server is not assigning IP addresses. This is (generally) either the fault of his router or his modem.

    IP config does this if you're connected directly to the modem. If you'd like to release/renew the modem itself, then turning it off/on would be the easiest way of course. You may also be able to do this and more through a web admin interface, which you can find on a lot of modems. It might require a hard-reset to access though.

    This is unlikely unless he's invested in some sort of 'business package', but I wouldnt' rule it out I guess. DHCP is almost always used in place of static by default, unless otherwise requested. If it is static, release/renew won't do much good (modem wise). Infact, if it were static, his network info should be put in manually, which means he should never get whether his network works or not. The absence of this information could be the reason it is not working.

    A (hopefully) quick call to the phone company could give you all the answers you need.

    Best of luck.
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