DHCP Error

Question

Level 1

0 points

DHCP Error

I received a pop up error message that says IP Configuration 192.168.1.110 in use by 00:14:51:e5:XX:0c, DHCP Server 192.168.1.1 on my PowerBook G4.

I tried to renew the DHCP lease but the same error comes up. I tried manually set my IP address to other possible IP addresses but I get the same error. When I check to see what else is connected to my network, the list does not show those IP addresses as being used.

I've come across other posts about this problem, but I haven't come across a solution. Has anybody been able to solve this mystery?

Powerbook G4 Mac OS X (10.4.8)

Powerbook G4 Mac OS X (10.4.8)

Powerbook G4 Mac OS X (10.4.8)

Powerbook G4, Mac OS X (10.4.8)

Posted on Nov 18, 2006 7:34 AM

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Answer 1

Nov 18, 2006 11:10 AM in response to BlueE

Hey Blue-
Mysteries are made to be solved.
a) When you see this popup, does your internet/network access fail?

1) your router - is this a wireless device? Make and Model, please...
2) Are you connected to it with ethernet cable, and do you have your Airport active on your Pbook as well?
3) What other devices do you have hooked up to your network?
4) Are you sure that you're connected to your router (wireless), and not a neighbors?
5) what IP address ARE you getting from your DHCP?
(We know the 192.168.1.x part. We kind of need the whole address to make sense of this)

Some questions require some answers.

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Answer 2

Camelot

Level 9

58,599 points

Nov 18, 2006 11:38 AM in response to BlueE

There are two possible causes for this problem.

1) Your DHCP server is handing out the same address to two devices (unlikely)
2) You have some device on your network that is manually set to an address in your DHCP range.

I'm guessing #2 in this case. If you're manually assigning IP addreses you should make sure they don't overlap the DHCP range you're using.

The possible solutions are to a) find the device at 192.168.1.110 and change it's IP address to something that's compatible with your DHCP range, or b) change your DHCP range so that the 192.168.1.110 isn't in it (e.g. if your DHCP range is 192.168.1.2 - 192.168.1.254, change it to something like 192.168.1.2 - 192.168.1.99. This still gives you 98 DHCP addresses, and leaves everything above .100 as a static address.

If you want to track down the device that's using the address, the MAC address prefix of 00:14:51 indicates that it's some kind of Apple device, so that should help narrow down the search.

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Answer 3

BlueE Author

Level 1

0 points

Nov 20, 2006 9:47 AM in response to Rick Van Vliet

Hi Rick,

Thanks for your reply.

Answers to your questions:
a. Internet/network access fails
1. Router - It's a wireless device. It's a Linksys WRT54G ver5. I also tried upgrading the firmware but got the same error.
2. I tried both a wired and a wireless connection but encountered the same error.
3. There are just three other laptops that connect to the network.
4. Yes. I don't detect any other access points.
5. I can't get an IP address so I'm not able to connect to the network. Since there are only a few devices that use this network, I'm able to try other IP addresses, but none of them work, even though they are definitely available.

As I mentioned, as I was searching the internet for a possible solution to my problem, I came across a guy that got the same error message when he tried to hook up to his hotel's internet service. He, too, was not able to solve his problem.

I also found a post in this forum a few months back with the same problem, that was not answered.

Hope you can figure it out.

Powerbook G4 Mac OS X (10.4.8)

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Answer 4

Nov 20, 2006 10:23 AM in response to BlueE

See if anything that Camelot offers works. He is really good.

Also. Turn off, power down, unplug any other network devices.
Power off this Mac.
Unplug router (power down).
Wait a few moments.
Now!
Power up THIS mac. wait a few minutes. Errors?
Now power up the rest....errors?

If all the above works, good.
Do the router reset below, if this little test above here doesn't work.
Good Luck
-------------

Power computers and network devices down, except the router.
Now, do a reset on the router. Can't remember what make/model, but there's usually a small hole where a pen point or unbent paperclip will fit. Look for a reset button.
Reset.
Power cycle the router, now.
Pause.....
power up the problem mac....test.
OK? Power up the rest.

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Answer 5

N3orun

Level 1

0 points

Nov 23, 2006 1:39 AM in response to BlueE

downgrade the firmware - linksys bug! See "DHCP Timeout" topic.

MBP 15", 2,16, 2gb Ram Mac OS X (10.4.7)

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Answer 6

Feb 7, 2007 8:31 AM in response to N3orun

I am getting this same error message. It is happening through out two a buildings. Some of the computers are airport some are hardwired. None of the addresses that the error is happening on are staticed. The error message gives the MAC address of the computer using that address. All the MAC addresses come back to computers that are set for DHCP. Our servers are G5 towers running the latest 10.4 server.

Also when this happens it takes awhile to get a DHCP address but as soon as it gets an address we are good to go. But this can take a while to get an address

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