DHCP Release + Renew every 30secs

Addon / Wbr9200
April 26, 2010 at 05:10:48
Specs: Windows Vista
Ive had the router about 1 year now and never had a problem with it, just plug and play. but for the last week ive been having lag spikes every 30secs exact and last for about 6secs on wireless and wired conections, So first off i tryed to just connect direct to the modem and i have no problems, so then i tryed updating my firmware on router but no luck, so then i did a hard reset on router and no luck still, so then i checked the logs and noticed that every 30secs the Dhcp would release and renew changing my Ip, so then tryed to play about with a few settings but still no luck so in the end i reformatted my main desktop to see if the settings were messing with the router but still no luck, i can copy and paste the logs if you need, Any ideas?

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#1
April 26, 2010 at 05:40:30
So you have a modem and a router separately. Not a modem/router combination.

Can you try assigning fixed IPs to the computers to see if the problem goes away ?

Can you try another router ? Is your wireless on the modem or on the router ?

Regards
CoolGuy


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#2
April 26, 2010 at 07:56:14
Try turning off your WiFi and see if the problem goes away. If so then I recommend changing your encryption to WPA2 if the router supports it. My suspicion is that you are using WEP.

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#3
April 26, 2010 at 15:28:51
Problem solved, Thks alot Ace, i disabled the wireless access point but was still having problems but when i switched the encryption to WPA2 problem solved, Cant understand why it changed in the first place ive had it a year and no problems oh well its sorted now, Thanks again :)

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Related Solutions

#4
April 26, 2010 at 16:13:25
The reason I asked is there is a common exploit used to hack WEP and WPA which is ARP table attacks. They force a broadcast which causes the ARP tables to update so they can grab your MAC packets and use them with AirCrack to get your pass phrase; thous causing the IP to renew for every device. I don't know if I would trust your neighbors but on WPA2 they can't use this exploit which is why switching encryption worked.

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#5
May 4, 2010 at 06:03:19
Problem solved until today ................ For some reason out of the blue playing on my xbox its started again, ive gone to check my Encrytion and its still wpa2, tryed to change it to another Wep then back again and still lagging every 30 secs, any more ideas? Is the router broken maybe? v

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#6
May 4, 2010 at 06:20:40
Ok Set Encryption to Wep and left it on that and problem fixed again, Cant understand why this keeps happening, Weird Also it doesnt matter if i disable the access point or not seems to keep happening anyway, Also my logs dont show that my Dhcp keeps releasing and renewing now either

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#7
May 4, 2010 at 06:34:50
Can you try another power adapter for your wireless device ?

CoolGuy


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#8
May 5, 2010 at 00:21:49
Will try when it happens next but atm its fine again, Ive set it back to WPA2 and changed my passphase and its ok again now. just wish i knew the cause instead of it randomly starting and stopping,

You thinking the power adapter might be overheating causing it to trip out? I thought that myself but intervals between the lag spike are perfectly timed 30secs, So seems more like a software or configuration problem rather than a hardware problem but then again it does just randomly start when it like so who knows,

Thanks for everyones ideas and help, il keep you updated if it happens again


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#9
May 10, 2010 at 03:37:26
Starting happening again, Ahhhhhh lol. Changed power lead and no luck, heres the log from router

May 10 10:34:26 (none) kern.debug udhcpc: Sending release...
May 10 10:34:27 (none) kern.info udhcpc: Entering released state
May 10 10:34:27 (none) kern.info udhcpc: Performing a DHCP renew
May 10 10:34:27 (none) kern.debug udhcpc: Sending select for 86.13.39.199...
May 10 10:34:27 (none) kern.info udhcpc: Lease of 86.13.39.199 obtained, lease time 600389

This happens exactly 26secs (was 30secs a few weeks back so dont know whats changed lol)


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#10
May 10, 2010 at 12:56:13
Who is "86.13.39.199"? Is this the IP your ISP gives you and is it static?

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