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Author Topic: DHCP Lease Time Question  (Read 15229 times)

thecreator

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DHCP Lease Time Question
« on: November 11, 2008, 10:39:57 AM »

Hi All,

Under DHCP Server Settings:
Use this section to configure the built-in DHCP Server to assign IP addresses to the computers on your network.
Enable DHCP Server is checked or Enabled.
DHCP Lease Time: Set at 10080 minutes.

The computers on the Network are leased for 7 days, but the NetGear SC-101 Storage Central Unit with two Hard Drives are its partitions are only leased for about 24 hours.

WARN] Tue Nov 11 08:57:27 2008 A network computer (Drive Images) was assigned the IP address of 192.168.0.196.   
[WARN] Tue Nov 11 07:42:41 2008 Above message repeated 138 times   
[INFO] Tue Nov 11 07:42:38 2008 Blocked incoming UDP packet from 219.133.37.42:1106 to 98.233.102.120:1434   
[WARN] Tue Nov 11 07:42:09 2008 A network computer (Drive Images) was assigned the IP address of 192.168.0.196.   
[WARN] Tue Nov 11 07:35:06 2008 Above message repeated 13 times   
[WARN] Tue Nov 11 07:34:36 2008 A network computer (TV Programs) was assigned the IP address of 192.168.0.194.   


It is a Network Hard Drive, not a Computer.

Is this a function of the Storage Central Unit or a function of the computer and every time the Hard Drive partition gets mapped to the operating system, is the Lease Time updated in the Router?

Running D-Link DIR-655 A3 with Firmware Version of 1.21.

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thecreator - Running a Verizon FIOS / Fios-G1100 Router into a D-Link DIR-859 Router Rev. A3, Firmware 1.03 and a D-Link DWA-552 Wireless Network PCI Adapter Card. OP Sys: Win 10 Pro - DNS-323 with Firmware 1.10

funchords

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Re: DHCP Lease Time Question
« Reply #1 on: November 11, 2008, 08:45:43 PM »

Have you powered-off and powered-on the Netgear SC-101?

It appears that the Netgear SC-101 is requesting every 30 seconds!  Are you saying that you don't start seeing those messages until 24 hours?

I would expect to see something like this if the Netgear got its original lease as an hour lease, and then the DHCP server (your router) was reconfigured to the 7 day period and reset.  The DHCP offer being made is being rejected by the SC-101 (probably because of some mismatch), so it keeps asking.  It will do this until the lease it thinks it has is expired, then it is supposed to revert to an deconfigured IP and make broadcasts for any DHCP assignment -- at which time it'll stop rejecting and will accept the offer.   

Powering off and powering on the SC-101 might clear this, or you can just wait, and then either way life should be good from that point forward.

If it keeps happening over and over, then the above was not the issue. 

Quote
It is a Network Hard Drive, not a Computer.
There is no distinction made by a DHCP server. It would say the same thing if the dishwasher requested an IP address from it. :-)
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ttmcmurry

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Re: DHCP Lease Time Question
« Reply #2 on: November 12, 2008, 06:11:55 PM »

I wonder if there's a reason why you have a storage unit set to use DHCP.  :)    There are many reasons why it should be a Static IP.  Have you tried setting your Netgear SC-101 to static? 
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Lycan

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Re: DHCP Lease Time Question
« Reply #3 on: November 13, 2008, 02:31:51 PM »

Even better is DHCP reservation. That way if the NAS gets reset it's guarteed to pull the same IP.
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thecreator

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Re: DHCP Lease Time Question
« Reply #4 on: November 13, 2008, 02:32:25 PM »

I wonder if there's a reason why you have a storage unit set to use DHCP.  :)    There are many reasons why it should be a Static IP.  Have you tried setting your Netgear SC-101 to static? 

Hi ttmcmurry,

Regardless of what the IP Address is, it gets mapped to the operating system at bootup. It does not need a Static IP Address. It does not have FTP Capabilities. It is strictly Storage, to any computer, which the Hard Drive is mapped to.

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thecreator - Running a Verizon FIOS / Fios-G1100 Router into a D-Link DIR-859 Router Rev. A3, Firmware 1.03 and a D-Link DWA-552 Wireless Network PCI Adapter Card. OP Sys: Win 10 Pro - DNS-323 with Firmware 1.10

ttmcmurry

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Re: DHCP Lease Time Question
« Reply #5 on: November 14, 2008, 03:43:56 PM »

Your reasons are all valid- I only wanted to help you in terms of the error messages you were getting regarding DHCP.   What I was curious to know is-- if you set it to static, do you still get the same DHCP error messages in the 655's log?   If so, then something *really* weird is going on.  If not, then you know your SC-101 is working properly with static IPs *and* there should be no more errors in the DIR-655 log.

Personally I use DHCP reservation (like Lycan mentioned) on my DIR-655 for my DNS-323 storage unit.  It works GREAT.

Food for thought
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