Things to try should your net die.

  JonnyTub 20:03 22 Mar 05
Locked

Read this ages ago and thought it could do with posting here to help trouble shoot troublesome networks and internet connection woes, some of you might find it handy so here goes....


1. The first solution is to check all your cables are plugged into the right socket. Check each individual device that comprises your network.

2. Standard network cards usually have two lights, one green and one orange, the former indicates a working electrical connection between the two ports and the latter notifies you of network activity, both lights are useful for tracking problems, refer to your manual for more specific instructions on these lights.

3. Believe it or not nic cards can go pop and they’re extremely difficult to diagnose as windows can sometimes still recognise the card fine with no errors reported, although the driver may not start or the software will report ‘unknown error’. A blown nic card can also display a green light but shouldn’t display any traffic. The latter is usually a big giveaway.

4. Every pc that accesses the internet needs a unique ip address to communicate with other devices online. For xp users, double click the network icon in the system tray and click on the status tab, or click on start, run and type ‘CMD’. If your pc connects directly to the internet, this reveals the true ip assigned by your isp. If you connect via a router or another network, it shows the internal ip assigned by the local network, usually beginning 192.168.

5. If you’re having problems connecting to a wireless base station or with a centrino laptop, then the first step is to check your devices wireless security settings. The most common problems tend to be Mac filtering and wep security. Mac filtering restricts what devices can connect to the network. You can find your Mac address by looking at the bit of hardware your using to connect with, it should be printed on it somewhere, or on a sticker, once you find it, enter it into the base stations list for allowing network access. Wep security is different altogether, it adds basic password encryption to the transmitted data, the passwords set on the base station and any communicating devices must match, temporarily disable wep encryption if you’re experiencing any problems.

6. If you find your keep being disconnected from the net, check your phone line for noise, this slows down transfers and causes disconnections.

7. Another modem problem is call waiting: the beep noise prompts modems to disconnect. You can turn off call waiting on bt lines by dialling #43#.

8. If your modem isn’t connecting at 56 kbps, tough luck. It never will, expect 52 kbps at best and more commonly 40+kbps. General line interference reduces the speed.

9. If you have an internal modem and upgrade to xp, don’t expect your driver to work unless you have specific xp one, upgrade the modem to a USB one.

10. Usually modem routers are switching units, this means they work at any speed, be it 10baseT or 100baseT, older units will sometimes only work at one setting or the other.

11. Try resetting your router, they can crash or behave oddly when tired. A reboot will refresh both the ip and the router

12. Lost ADSL setting: In the uk they should be VPI = 0, VCI = 38, Modulation = Auto or G.DMT, encapsulation = PPPoA and Authentication = CHAP

13. Occasionally isp’s go down, sometimes they’ll let you know, sometimes they won’t.

14. Under network connections, check the properties of your main internet connection. You should see TCP/IP listed as a protocol and client for Microsoft networks both need to be installed.

15. If your network isn’t on the internet, you may need to provide a fixed ip address. Start on the first pc with 192.168.0.1 and increase the last number by one for each machine thereafter.

16. A feature you’ll find on all internet gateway routers is NAT (network address translation). You’ll need to switch this feature on if your router supports uPnP.

17. If your broadband connection is grinding to a halt, check what the other pc’s on your network are up to, no-one like’s a fat pipe hog. Bandwidth can reduce to a crawl if your kiddies next door is downloading illicit movies and other ‘downloads’.

  JonnyTub 20:06 22 Mar 05

4. Every pc that accesses the internet needs a unique ip address to communicate with other devices online. For xp users, double click the network icon in the system tray and click on the status tab, or click on start, run and type ‘CMD’, from the command prompt type ipconfig and hit enter. For win 9x do the same but ype COMMAND instead of CMD. If your pc connects directly to the internet, this reveals the true ip assigned by your isp. If you connect via a router or another network, it shows the internal ip assigned by the local network, usually beginning 192.168.

  Dan the Confused 20:26 22 Mar 05

Don't forget WinSockFix if your TCP/IP settings get messed up click here

  mattyc_92 20:27 22 Mar 05

Nice rhyme... (the title of this thread)

  JonnyTub 20:29 22 Mar 05

Cheers Dan, any more words of wisdom appreciated.

  Jeffers22 20:34 22 Mar 05

Thanks JonnyTub. Nice and concise.

  tonyx1302 20:37 22 Mar 05

Have just read and digested your post hoping that it would help me with my current post..'Website found-waiting for response ' and nifermac's current post of 'Internet pages hanging'. Do you have any thoughts please on our problems as I have already done stalions thougjt and it hasn't cured the problem.

Thanks in anticipation

Tony

  Pesala 20:38 22 Mar 05

19. Check the box on the wall outside.

Believe or not, in the last place I stayed, someone removed the cables from the wall outside connecting the switch box to my room.

  JonnyTub 21:48 22 Mar 05

^

  JonnyTub 00:01 23 Mar 05

As much as it's a pain, get the router out of the loop and see if you have the problem with just one computer attached directly to the Cable or DSL modem. If you still have the problem, at least you'll only get the run-around from your ISP!
If the problem goes away without the router, reconnect the router and upgrade your firmware to the latest revision. This is usually available from the router manufacturer's support website.
While you have a normal connection, log into the router admin pages, and take a screen shot of the Status page, or at least write down the WAN IP, Gateway, and Primary and Secondary DNS information. Save this in a handy place next to the router.
If your connection is being dropped multiple times per day, it may be that your ISP is forcing you off because they don't like routers connected to their network. Try using the MAC address cloning feature of your router and change the WAN MAC address to be the same as the one on the computer that was connected before you added the router.
Next time your connection drops, first look at your cable modem or DSL router's status lights and make sure they are indicating normal operation.
Next, before you unplug or reboot the router, log into the admin pages and check the Status page again. If the IP address is missing, you've somehow lost your DHCP lease. If your router allows you to do a DHCP Release and Renew (buttons are usually somewhere on the Status page if you have the function), try that. If the IP address information comes back, then you shouldn't have to reboot the router, but you may need to reboot or do a DHCP Release/Renew on your LAN's computers to get them working again.
If your router has a keep-alive or auto-reconnect function (especially for DSL connections) try enabling it.
Try to note if there's any pattern to the disconnection. Weather, time of day, power interruptions, running a particular application, etc. Keep a written log so that you have data.
Speaking of power interruptions, try plugging the router and cable/DSL modem into at least a good surge protection strip, but preferably a UPS (Uninterruptable Power Supply). Prices for decent UPS' have dropped so much that it's not worth messing around with anything less if you even suspect power glitches or problems.
Finally, do some research, to see if others have a similar problem. The Hardware forums on dslreports are a pretty good place to see if you have company in your misery.
Happy hunting!

  g0slp 06:47 23 Mar 05

For my future use (but hopefully NOT needed! :-))

Thanks JonnyTub

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