Power outage messed up my network

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Level 1

16 points

Power outage messed up my network

Here's my network: DSL modem, D-link wireless router, G5 desktop running 10.5.8 connected via ethernet, Macbook Pro connected via Airport, internet phone service connects to the router via ethernet.

After a power outage my G5 is off my network. I still have internet, the phone still works and the Macbook gets online, but the G5 can't connect to the internet. Network Diagnostics was unable to solve the problem. Ideas?????

Dual 2.5 G5, Macbook Pro 2.4, Mac OS X (10.5.8), Logic 8, 7GB of RAM, 500GB hard drive, Hammerfall soundcard

Posted on Feb 7, 2010 10:19 AM

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Answer 1

red_menace

Level 6

17,030 points

Feb 7, 2010 10:27 AM in response to Jon Esler

What IP address is it using? You might try renewing the DHCP lease to pull a new address from the router.

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Answer 2

Jon Esler Author

Level 1

16 points

Feb 7, 2010 11:07 AM in response to red_menace

I did that and the same IP address came back. One curious thing is on the TCP/IP page there isn't a number next to 'Router', should there be?

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Answer 3

red_menace

Level 6

17,030 points

Feb 7, 2010 11:35 AM in response to Jon Esler

There should be a router address in there somewhere, since that is where you would be getting the local address. If your address is in the range 169.254.x.x, then it isn't getting an address from a DHCP server, and is assigning it's own.

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Answer 4

Jon Esler Author

Level 1

16 points

Feb 7, 2010 11:45 AM in response to red_menace

The IP is 169.254.43.241 so I think we can conclude that the computer and the router aren't talking. Is there a way within Network preferences to re-establish the connection or do I have to do it using the browser and that whole rigmarole?

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Answer 5

red_menace

Level 6

17,030 points

Feb 7, 2010 11:58 AM in response to Jon Esler

If you are using one of the "Using DHCP" configure options, the router address (and subnet mask) should be figured out automatically.

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Answer 6

Jon Esler Author

Level 1

16 points

Feb 7, 2010 12:17 PM in response to red_menace

In the ethernet window 'Configure' is set to 'Using DHCP'. The IP Address is as listed above and the Subnet Mask is 255.255.0.0. Like I said, there is no number listed in the Router section. I'm guessing here but I think the computer is assigning it's own IP Address and is not getting it from the ISP.

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Answer 7

Jon Esler Author

Level 1

16 points

Feb 7, 2010 12:20 PM in response to Jon Esler

Just to add to that, at the top of the window it says Status: Connected. But underneath that it says "Ethernet has self-assigned IP address and may not be able to connect."

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Answer 8

red_menace

Level 6

17,030 points

Feb 7, 2010 12:44 PM in response to Jon Esler

Correct - self-assigned IP addresses are set by a particular device that needs an address but hasn't been assigned one. These addresses are like other LAN addresses in that they are not routable over the internet. Your computer would normally get it's address set by the router, but apparently doesn't know about it.

Not sure why the router address isn't there, but you might try manually setting an address in the DHCP range of your router. For example, if your router normally assigns addresses such as 192.168.0.3, manually assign an address such as 192.168.0.100. The router normally doesn't route a self-assigned address, but you can enter the router address when using a manual configuration.

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Answer 9

Jon Esler Author

Level 1

16 points

Apr 5, 2010 2:23 PM in response to Jon Esler

For some reason power outages cause my router(D-link DI624) to lose it's network settings so I have to create them each time. Ugh!

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