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Author Topic: BUG REPORT: DHCP Lease renew time is screwed up!!!!  (Read 4931 times)

bjrichus

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BUG REPORT: DHCP Lease renew time is screwed up!!!!
« on: May 26, 2008, 09:43:42 AM »

I'm using firmware 1.04.

I have my DHCP lease time ste to 480 minutes. That is 8 hours.. right?

Well, guess what... My router is renewing the DHCP leases once every 4 hours.

Here are todays log entries so far...

May/26/2008 08:12:04    DHCP lease IP 192.168.0.100 to gameroom           
May/26/2008 04:12:05    DHCP lease IP 192.168.0.100 to gameroom           
May/26/2008 00:12:07    DHCP lease IP 192.168.0.100 to gameroom           

I expect it to renew the lease to 'gameroom' at 12:12 this afternoon... I'l let you know if it does.

 :-\





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bjrichus

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Re: BUG REPORT: DHCP Lease renew time is screwed up!!!!
« Reply #1 on: May 26, 2008, 10:14:37 AM »

Ah ha!!!!

Indeed DHCP did it's thing after 4 hours:

May/26/2008 12:12:01    DHCP lease IP 192.168.0.100 to gameroom

So - this is a real easy to reproduce bug.

Anyone else able to provide log file entries the same way?
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Fatman

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Re: BUG REPORT: DHCP Lease renew time is screwed up!!!!
« Reply #2 on: May 27, 2008, 07:59:10 AM »

Standard protocol is to attempt to renew leases at half their life, this is normal operation.

Why is this a concern for you?
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bjrichus

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  • Posts: 119
Re: BUG REPORT: DHCP Lease renew time is screwed up!!!!
« Reply #3 on: May 27, 2008, 10:59:26 AM »

Standard protocol is to attempt to renew leases at half their life, this is normal operation.

Why is this a concern for you?

Really? I was not aware of that!!!  :o

It is a concern because it renews at half  the time it was set to renew them. If its standard protocol, then its how its done.

Fair enough.

(After a few minutes digging, I found this "easy to understand" explanation:

Quote
http://www.comptechdoc.org/independent/networking/guide/netdhcp.html

Isn't it amazing what you can find out just by looking?

 :-[


« Last Edit: May 27, 2008, 11:06:21 AM by bjrichus »
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Fatman

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Re: BUG REPORT: DHCP Lease renew time is screwed up!!!!
« Reply #4 on: May 27, 2008, 03:46:19 PM »

Yeah it filed in the annals of useless networking knowledge.

I find that with a little creative wiki use I can convince most people I walk on water, tis quite amusing.

Glad to help.
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