How do I revoke a DHCP lease in the 10.8.4 server app?

Hello Everyone,
I have some devices (security cameras) that have successfully requested a DHCP lease. Since then I went ahead and manually created a static reservation for them with a MAC hardware address in the DHCP. For whatever reason they are not switching over to the reserved address. The leases were originally for 1 day. It has been 5 days now. After the first day I switched my lease time to 1 hour. I have done everything short of leaving the devices off for 24 hours.
In Lion server, I could revoke the lease via the gui. No such luck now. My call to Applecare resulted in a "there is no way in 10.8.4 to do this". They said it would switch to the new reserved address after the initial lease period timed out, so I'm hoping the representative was wrong twice. They mentioned a complete lease wipe, but couldn't say if this would cause me to lose my list of reserved static addresses, which isn't an option.
It seems crazy that such a basic feature wouldn't make it into this release of the DHCP service. Any help would be greatly appreciated!

Are there any DHCP queries from the cameras? Check the DHCP server log via Console.app or Server.app (or Terminal.app) for details. (I don't know the 10.8 path to the DHCP logs offhand.)
According to a FAQ over at the Vivotek site, the following is the setup sequence for various recent cameras; the boxes start up in the "I don't have an IP address" self-allocated address block oddly enough, and apparently don't ask for a DHCP address? (You may well be aware of all of this, but this is the block that DHCP clients use when they first communicate with DHCP servers.)
If you are using our new product such as IP7138 / IP7139 / FD7131 / VS7100… etc, no matter your network environment is what, you can always find the camera by Installation Wizard II with the IP address 169.254.x.y.
And then, please double click the camera found by Installation Wizard II or directly type the IP address to your Internet Explorer URL box to access your camera (you do not need to change your PC's IP address). After access your camera, please go to "Network" page to configure proper network settings.
See if the devices are available via mDNS, as well; download the Bonjour Browser and have a look around your LAN. (If you're very lucky, the cameras might be visible and chatting on mDNS.)
Might also try resetting one of the cameras back to factory defaults, and seeing if you can get them to re-ask the DHCP server.
(I've had issues with some HP printers and DHCP clients and IP address assignment, but that's fodder for another discussion. And I also wouldn't rule out a rogue DHCP server, either. I've seen all sorts of unexpected stuff connected to networks over the years...)

Similar Messages

How to deploy my own web services to the Start BPEL PM Server?

Recently, I am learning the JDeveloper BPEL Designer(version 10.1.2.0), I had finished my first BPEL process CreditFlow flowing the quickstart guider.
Now I wonder how to deploy my own web services to the Start BPEL PM Server? I mean I don't want to invoke the CreditRatingService as I did flowing the quickstart guider, but to invoke my own web servcies. Now I had made some web services with eclipse and deployed them to the tomcat5.0. but how can I invoke these my own web services just like I invoked the CreditRatingService in the JDeveloper BPEL Designer?
Thank you!

Copy the WSDL file from your Tomcat server onto your development machine. Add them to your project in JDeveloper. Then add a partnerlink and specify the WSDL location. Then add you role, variables and compile!

[Q]: Static DHCP Lease with the WRT54GL...

Hello,
I have replaced my old D-LINK router with a WRT54GL wireless router.
On the old router I could configure static DHCP entries, providing the same IP address to specific MAC addresses (from my different devices at home), and still continue to receive all other settings via DHCP (Like DNS servers that my ISP changes from time to time).
Using static IP addresses is not an option due that the ISP I'm connected changes the DNS settings frequently and my computers can't connect to the internet. Setting the WRT54GL router as DNS server on my computers is also not practical.
On the WRT54GL I could not find how to create static (or permanent) DHCP leases. Is this possible?.. is this in the wish list for future releases of the firmware?
Thanks in advance.

Thanks for the quick response.
I was surprised that this (and maybe other) Linksys routers does not provide this simple feature.
All DHCP servers I know provide this feature and most of the unmanaged routers that provide DHCP services have this feature.
--- Ricky.

How to have my new Apple ID in the AppStore without rebooting past apps.

Hi everyone!
I wonder if someone could help me as I've been looking for the answer for weeks and it's now becoming extremely frustrating!
Here's my problem: I've recently changed Apple ID address and my old one (email address) keeps popping when logging onto the App Store. I need to update a few Apps (46 already) and cannot do so as I can't remember my old password! I tried reseting the password but the email never seems to arrive! Also tried answering the security questions but it keeps telling me that my DOB is wrong! I'm completely trapped and wouldn't like to delete those 46 Apps and start again. Any idea how to fix this please???

On your iPad...
Settings > iTunes and App Store > Apple ID = Sign Out...
Then Sign In using the preferred Apple ID.
Note:
Anything Downloaded with a Particular Apple ID is tied to that Apple ID and Cannot be Merged or Transferred to a Different Apple ID
Apple ID FAQs > http://support.apple.com/kb/HT5622

How can I view attachments in events using the native iOS 5 calendar app?

I thought I read that this will be possible with iOS 5, but I could not work it out so far.
Please help!

Cheers Mate!
Sounds like a major stuff up on apple's behalf as this feature has been announced widely (incl their own webpage) sand is even included in the official release notes of the install file(!!)

How to use CELLWRAPPER in 10g for scheduling the job in print server?

Hi Gurus,
I need to add CELLWRAPPER while printing a report to a delimited file from
10G report server using 10G print server job scheduler. In 6i Its working fine.
Below code I used in 10G.
V_Cellwrapper := '''"''';
Srw.Add_Parameter(v_Param_List, 'CELLWRAPPER' , V_Cellwrapper);
v_Job := Srw.Run_Report (v_Param_List);
But It is throwing error (ORA-20999). Please help.

Hi,
when I remember right, 20999 is in the range of user defined exceptions. So it's not an error message created by Oracle internally, it's created by a developer (might be in your case inside a trigger). So I would look in the database, when this exception is created. Is there no text with the error-message?
Regards
Rainer

Self-assigned IP after trying to renew DHCP lease for former network

Hi all,
MacBook Pro 15" purchased in Februrary 2008, currently running 10.5.5, up-to-date with patches as of yesterday, 10/20/2008.
For a few weeks now, I've been consistently unable to connect to wireless networks (secured or unsecured, public or private) after changing networks (i.e. going from home to a coffee shop).
I have control over my home network router, and its logs show that upon connecting to the network, OS X tries to renew a DHCP lease for the previous network it was on. Upon receiving the "bad network" DHCP reply, instead of releasing the lease and obtaining a new one, the AirPort interface is immediately assigned an IPV4LL address (from 169.254.0.0/16) and no combination of changing network settings, changing AirPort settings, or rebooting will eliminate the old DHCP lease.
The end result is that my MBP is entirely nonfunctional on some wireless networks that other clients (both Windows and Mac) seem to have no trouble accessing. The problem is quite annoying because I can't connect to access points that (previously) worked fine and whose configurations haven't changed.
In any case where this problem occurs, an old DHCP lease for a different network (10.0.0.0/8 when trying to get on 192.168.0.0/24 or vice versa) is present, so I strongly suspect a DHCP problem. In all cases, I have perfect connectivity to the access point itself, so problems with the wireless connection parameters (including encryption), or those troublesome problems with 802.11b/g/n interoperation seem highly unlikely.
One of two things would help me:
1) Please tell me how to clear the DHCP lease cache. Deleting files from /var/db/dhcpclient/leases does nothing (they appear again upon reboot, identical save for timestamps even after changing network environments, so the cache must be read at boot time and written at shutdown). Selecting "Renew DHCP lease" from the "TCP/IP" tab in the advanced network settings merely attempts to renew the existing lease (for an invalid IP address); it does not appear to release invalid leases.
2) If this is really how the DHCP client is behaving, change the DHCP client so that upon receiving the "Bad network" response, it releases (or simply abandons) the lease and obtains a new one, rather than immediately assigning an IPV4LL address to the AirPort interface.
Additionally, is there any documentation on the Apple DHCP client? Under Linux, I could alter dhcpcd parameters to diagnose things like this. I could find no documentation about the Apple DHCP client outside of Mac Help, which wasn't really any help in this case.
Finally, I do not suspect that this is an instance of the problem discussed in http://discussions.apple.com/thread.jspa?threadID=1352518&tstart=0 as my connection is rock-solid if it can get an IP address when it connects. I've never even seen it hiccup.
Thanks,
Matt Z.

I have had wireless problems intermittently for a year, and seriously for 6 weeks. Apple denied the issue and was no help in spite of many tens of thousands of people on their own discussions complaining. I found a post suggesting a couple of things which fixed the problem. I don't know if both are necessary, but the first by itself does not solve the problem.
Lock the channel of your router to channel 1, apparently Apple and 802.11n don't play well together on higher channels. When this becomes a standard this will be resolved I hope.
Open your network preferences, select 'airport' and advanced. Delete unused networks. Select your network.
Open TCP/IP and write down all the settings, configure iPv4 manually. Enter the settings manually. Turn off IpV6.
Open DNS and write down your DNS server. Delete it and re-enter it manually.
This has worked on 2 macbooks and an iMac for the last 3 weeks with no network drops.
Joe Shea
Philadelphia

Cisco 867VAE drops connection on DHCP lease timeout

Hey!
We have a very annoying problem on our hands. I'm no IOS expert, but I make do.
We've got a Telia DSL connection that has a 20 minute DHCP lease timer. Every 20 minutes when it shakes hand again, the connection drops for about 5 seconds. This because the Cisco thinks that administratively shutting down the interface is a good idea....
How do I stop this behavior? I've tried manually setting <ip dhcp client lease 1 0 0> (for 1 day lease) but it completely disregards that.
Best would obviously be to stop it shutting down the interface every time, but worst case scenario I'll take a solution with a longer DHCP lease since the address rarely changes.
<snip from log>
*Aug 1 01:44:43.514 PCTime: %DHCP-6-ADDRESS_ASSIGN: Interface ATM0.1 assigned DHCP address 81.230.xxx.xx, mask 255.255.255.0, hostname elsa
*Aug 1 02:04:48.498 PCTime: %DHCP-5-RESTART: Interface ATM0.1 is being restarted by DHCP
*Aug 1 02:04:56.106 PCTime: %DHCP-6-ADDRESS_ASSIGN: Interface ATM0.1 assigned DHCP address 81.230.xxx.xx, mask 255.255.255.0, hostname elsa
*Aug 1 02:25:01.050 PCTime: %DHCP-5-RESTART: Interface ATM0.1 is being restarted by DHCP
</snip>
It's running firmware c860vae-ipbasek9-mz.153-2
I'm attaching the current running-config as well.
Thank you in advance!
Best Regards
Daniel

I'm sorry for not reporting in. The case is closed at Cisco and they simply couldn't do anything. The router does, according to the debug logs, send dhcp renew requests, but the ISP doesn't reply to them. If they get lost on the way, or if there's an incompatability with the ISP, I dunno. I heavily doubt it, since Telia (Swedish ISP) used Cisco gear for pretty much everything.
Also, Telia will not reply to anything like this, since they don't support equipment they don't supply.
So I'm completely at a loss, and will remain there until I stumble across something.
I've received an 887M router though, which I'm gonna test. But I'm currently stuck with the fact that it's not supported anymore, and therefor I can't seem to download new IOS software (it uses a very old one).
This is the last reply I got before they closed my case:
*Aug 27 14:56:15.751 PCTime: DHCP Ack Message
*Aug 27 14:56:15.751 PCTime: DHCP: Lease Seconds: 1200
*Aug 27 14:56:15.751 PCTime: DHCP: Server ID Option: 213.66.241.86
*Aug 27 14:56:18.751 PCTime: DHCPD: IP address change on interface ATM0.1
*Aug 27 14:56:18.751 PCTime: DHCPD: IP address change on interface ATM0.1
*Aug 27 14:56:18.751 PCTime: DHCP: Releasing ipl options:
*Aug 27 14:56:18.751 PCTime: DHCP: Applying DHCP options:
*Aug 27 14:56:18.751 PCTime:   Setting default_gateway to 81.230.121.65
*Aug 27 14:56:18.751 PCTime:   Adding default route 81.230.121.65
*Aug 27 14:56:19.751 PCTime:   Adding route to DHCP server 213.66.241.86 via ATM0.1 81.230.121.65
*Aug 27 14:56:19.751 PCTime:   Adding DNS server address 195.67.199.39
*Aug 27 14:56:19.751 PCTime:   Adding DNS server address 195.67.199.40
*Aug 27 14:56:19.751 PCTime: DHCP: Sending notification of ASSIGNMENT:
*Aug 27 14:56:19.751 PCTime:   Address 81.230.121.83 mask 255.255.255.192
*Aug 27 14:56:19.751 PCTime: DHCP Client Pooling: ***Allocated IP address: 81.230.121.83
*Aug 27 14:56:19.803 PCTime: Allocated IP address = 81.230.121.83 255.255.255.192
*Aug 27 14:56:19.803 PCTime: %DHCP-6-ADDRESS_ASSIGN: Interface ATM0.1 assigned DHCP address 81.230.121.83, mask 255.255.255.192, hostname elsa
*Aug 27 14:56:25.751 PCTime: DHCP: Client socket is closed
*Aug 27 15:06:18.759 PCTime: DHCP: Client socket is opened
*Aug 27 15:06:19.759 PCTime: DHCP: QScan: Bound..T1 fired..Renewing
*Aug 27 15:06:19.759 PCTime: DHCP: SRequest attempt # 1 for entry:
*Aug 27 15:06:19.759 PCTime: Temp IP addr: 81.230.121.83 for peer on Interface: ATM0.1
*Aug 27 15:06:19.759 PCTime: Temp sub net mask: 255.255.255.192
*Aug 27 15:06:19.759 PCTime:    DHCP Lease server: 213.66.241.86, state: 7 Renewing
*Aug 27 15:06:19.759 PCTime:    DHCP transaction id: 914
*Aug 27 15:06:19.759 PCTime:    Lease: 1200 secs, Renewal: 600 secs, Rebind: 1050 secs
*Aug 27 15:06:19.759 PCTime: Temp default-gateway addr: 81.230.121.65
*Aug 27 15:06:19.759 PCTime:    Next timer fires after: 00:03:46
*Aug 27 15:06:19.759 PCTime:    Retry count: 1   Client-ID: cisco-d48c.b524.7b17-AT0.1
*Aug 27 15:06:19.759 PCTime:    Client-ID hex dump: 636973636F2D643438632E623532342E
*Aug 27 15:06:19.759 PCTime:                        376231372D4154302E31
*Aug 27 15:06:19.759 PCTime:    Hostname: elsa
*Aug 27 15:06:19.759 PCTime: DHCP: SRequest - ciaddr: 81.230.121.83
*Aug 27 15:06:19.759 PCTime: DHCP: SRequest: 293 bytes
*Aug 27 15:06:19.759 PCTime: DHCP: SRequest: 293 bytes
*Aug 27 15:06:30.759 PCTime: DHCP: Client socket is closed
*Aug 27 15:10:04.759 PCTime: DHCP: Client socket is opened
*Aug 27 15:10:05.759 PCTime: DHCP: QScan: Renewal..Retrying
*Aug 27 15:10:05.759 PCTime: DHCP: SRequest attempt # 2 for entry:
*Aug 27 15:10:05.759 PCTime: Temp IP addr: 81.230.121.83 for peer on Interface: ATM0.1
*Aug 27 15:10:05.759 PCTime: Temp sub net mask: 255.255.255.192
*Aug 27 15:10:05.759 PCTime:    DHCP Lease server: 213.66.241.86, state: 7 Renewing
*Aug 27 15:10:05.759 PCTime:    DHCP transaction id: 914
*Aug 27 15:10:05.759 PCTime:    Lease: 1200 secs, Renewal: 600 secs, Rebind: 1050 secs
*Aug 27 15:10:05.759 PCTime: Temp default-gateway addr: 81.230.121.65
*Aug 27 15:10:05.759 PCTime:    Next timer fires after: 00:01:53
*Aug 27 15:10:05.759 PCTime:    Retry count: 2   Client-ID: cisco-d48c.b524.7b17-AT0.1
*Aug 27 15:10:05.759 PCTime:    Client-ID hex dump: 636973636F2D643438632E623532342E
*Aug 27 15:10:05.759 PCTime:                        376231372D4154302E31
*Aug 27 15:10:05.759 PCTime:    Hostname: elsa
*Aug 27 15:10:05.759 PCTime: DHCP: SRequest - ciaddr: 81.230.121.83
*Aug 27 15:10:05.759 PCTime: DHCP: SRequest: 293 bytes
*Aug 27 15:10:05.759 PCTime: DHCP: SRequest: 293 bytes
*Aug 27 15:10:16.759 PCTime: DHCP: Client socket is closed
*Aug 27 15:11:57.759 PCTime: DHCP: Client socket is opened
*Aug 27 15:11:58.759 PCTime: DHCP: QScan: Renewal..Retrying
*Aug 27 15:11:58.759 PCTime: DHCP: SRequest attempt # 3 for entry:
As pointed to you in my previous mails renews/packets are being sent and as router is not getting back any reply, lease is timing out and that’s the reason why the interface is getting flapped. You need to find with ISP why the renews and rebind packets are not responded to by Providers DHCP server.
Hope this clarifies your query.
Thanks and regards,
Lijesh

Renewing DHCP lease on a frequent basis....why?

for some reason I keep losing my internet connection and I have to renew the DHCP lease in the network system preferences pane. why would I have to keep renewing this lease? I have no clue as to what this lease is but everytime I lose my internet connection I press this button and I have a connection again.
I dont know what is going on to make me lose connection like this on an everdyday basis, several times a day in fact. any ideas? should I have time-warner swap out my modem?

my apologies, I should have been more straightforward with the info.....
once I move the desk/mac/modem is when I started having problems with outages. I noticed the problem, opened the network prefernces pane and tried the renew button. connection came right back for a while. went out again and again.....there is no consistent time limit on how long a connection stays up.. hit the button and its back....before I moved everything I never had this problem....

How do you revoke a web page's access?

So a web page asked for access to my computer, and though it had a certificate I've no idea how legit it is or what it wanted access to and tried to click 'no' but this trackpad is still a bit odd (getting used to it also being the click button) and accidentally clicked yes.
How do I revoke this access?

Launch the Java Preferences application and open the Security tab. Delete any items in the two lists shown that you don't want.

N82 does not correctly process DHCP leases

I have no problem attaching my new N82 to my, and friends, home wireless networks. However, it fails to connect to the Univeristy Campus network giving the error: "Web: No gateway reply!"
This is because the phone doesn't correctly process DHCP leases with the 'network of one'' (2545.255.255.255) subnet mask.
Campus network details:
HP WAP 530 enterprise access point. The DHCP server is an ISC dhcp server giving out ip address in the standard private class C address range (192.168.1.0) with a subnet mask of (255.255.255.255), and a default route of 192.168.1.1.
This works on Windows 2000/XP/Vista and MAC OSX, but many embedded devices will not add the default route as they see it as outside their subnet. Many institutions use 255.255.255.255 to mitigate inter host communication.
This means I cannot use my N82 at work and I'm not happy. Beware, don't assume you can use your Nokia device at work.

If task manager says it's still running, then obviously it hasn't completed, contrary to what you said. Maybe this .exe process isn't written correctly. For example, maybe it is dependent on the current directory it is launched from, and so double-clicking it causes it to be launched from the directory it lives in, but when run from this java app, the working directory is somewhere else.

Wake on Demand and DHCP Lease

I have a Mac Pro running Snow Leopard and an Airport Extreme. Wake on Demand works as advertised and I am able to access any sharing service running on the Mac Pro, even if the computer is asleep . . . but only for about 24 hours.
My only problem is that it seemed every night the Mac Pro would no longer be available to my Macbook. Troubleshooting it tonight, I think the problem is that the Airport Extreme base station is not renewing the Mac Pro's DHCP lease.
The Mac Pro's lease had been visible in the Airport Extreme's list of leases all day. When the Mac Pro no longer appeared in my Macbook's Finder, I opened Airport Utility and noticed that the Mac Pro had dropped off in the list of DHCP lease holders. After walking down to my basement and waking the Mac Pro with the mouse, the Mac Pro is back in the list of lease holders and Wake on Demand works once again.
While in the basement, I often hear the Mac Pro waking up momentarily, which I understand is to update the Bonjour Sleep Proxy. Shouldn't it also do something to renew the DHCP lease? Is there a way to make this system work for more than 24 hours without extended the DHCP lease length on the Airport Extreme?
Thanks for the help.

Hi mcewen. The Wake on Demand feature works with any service being advertised with Bonjour. The caveat with Web Sharing is that it only advertises itself with Bonjour if you've modified one of the default web pages. So all you have to do is go into the Sites folder in your Home directory, and make a change to the index.html file, and then turn off Web Sharing and turn it back on. That should get it to be advertised with Bonjour (you can verify this by going to the Bonjour bookmarks section in Safari to make sure your web page shows up). After that it will support Wake on Demand using Web Sharing.

Rogue DNS Settings appearing after initial DHCP lease

I am having issues with DNS settings changing on clients soon after allocation via DHCP. This is a workgroup only, no windows domain. DHCP is running from a Fortigate 60b which acts as the primary DNS server and Google DNS configured as secondary. The DHCP lease time is 8 days, these DNS changes can happen 3 times or more in a working day. The network consists of a single subnet, there is also an internal wireless network using Ubiquiti AP's.
1. Malware has been ruled out, having scanned machines with AV and Malware detection finding nothing.2. Have setup port mirroring on switch ports and scanned traffic for other sources of DHCP offer packets.. none found.3. When the DNS settings change they are different on each machine, but each time it is a valid IP for the network that can be found in the DHCP leases on the 60b.I was expecting to...
This topic first appeared in the Spiceworks Community

I am having issues with DNS settings changing on clients soon after allocation via DHCP. This is a workgroup only, no windows domain. DHCP is running from a Fortigate 60b which acts as the primary DNS server and Google DNS configured as secondary. The DHCP lease time is 8 days, these DNS changes can happen 3 times or more in a working day. The network consists of a single subnet, there is also an internal wireless network using Ubiquiti AP's.
1. Malware has been ruled out, having scanned machines with AV and Malware detection finding nothing.2. Have setup port mirroring on switch ports and scanned traffic for other sources of DHCP offer packets.. none found.3. When the DNS settings change they are different on each machine, but each time it is a valid IP for the network that can be found in the DHCP leases on the 60b.I was expecting to...
This topic first appeared in the Spiceworks Community

DHCP Leases vs. DHCP Statistics

While checking DHCP leases in the Computer Management MMC, I’ve noticed a discrepancy between the number of active leases displayed in Services and Applications
| Scope | Address Leases and the number of address reported as “in use” by right-clicking on Scope & selecting “Display Statistics.”
Generally, there seems to be a far lesser number of addresses displayed in the MMC “Address Leases” as compared to the number reported as “in use” by “Display Statistics.”
System is a SBS 2003 R2, fully patched & up-to-date.
I’m at a loss as to why this apparent discrepancy would exist.
Can anyone shed some light?
Thanks.

I have analyzed better the problem.
The "In use" value of "Display statistics" don't show the number of addresses really used by dhcp clients but show the maximum value of addresses that dhcp server has leased.
For example, if my dhcp server has scope 192.168.1.1-192.168.1.100 and addresses leased are
192.168.1.32, 192.168.1.36, 192.168.1.39
the "in use" value of statistics will be 39 even if addresses really used are only 3.
HTH
Edoardo Benussi - Microsoft® MVP
Management Infrastructure - Systems Administration
https://mvp.support.microsoft.com/Profile/Benussi
Windows Server Italian Forum Moderator
edo[at]mvps[dot]org

Windows 7 does not wake from sleep to renew DHCP Lease

I am having trouble with DHCP and sleeping Windows 7 systems. My Windows 7 systems go to sleep after an hour or so. The Intel and Broadcom NICs we have use ARP offloading so they continue to respond to ARP while the machine is sleeping.
The problem is that after the DHCP lease expires, the NIC continues to respond to the ARP requests and that causes IP conflicts on the network because the computer is responding to ARP requests for an IP address the computer has lost its lease on. Any
time a computer is asleep for longer than the DHCP lease time then when a new computer gets the IP from the lost lease, an IP conflict is reported because the new leasee does an ARP to see if the IP is in use and the sleeping computers NIC responds to the
ARP and this results in an IP conflict for the new leasee.
I opened a ticket with the Hardware Vendor, which is Dell in this case, and they opened an engineering case with Intel - the NIC OEM. The outcome of this case what that this is Windows fault. Windows is supposed to wake up from sleep and renew
its DHCP lease at the lease half life and then go back to sleep. My computers are not doing this. They let the lease expire while they are sleeping.
Is there a problem with Windows 7 that prevents it from waking up and renewing its lease periodically? It is supposed to maintain the lease according to Dell and Intel, but in my case it it not.

Extending the lease time is a bandage on the problem, and it is what we have done while I attempt to resolve the issue.
The network group would like the lease time set to 4 hours.
Extending the lease time doesn't resolve the issue because it only makes the problem occur less freqently. With a 2 week lease, a machine needs to be asleep for 2 weeks before it causes a problem. Machines are not likely to be asleep for 2 weeks
very often.
The resolution would be to figure out why a sleeping Windows OS is not maintaining its IP address. If it is not going to renew the DHCP lease while it is asleep, it is still responsible for updating the TCP stack (and the NIC) to let it know that it
no longer has a lease to that IP address. The OS has offloaded ARP to the NIC, which continues to respond to ARP while the computer is asleep. If the OS lets the lease expire, then it needs to notify the NIC to stop responding to ARP requests for
that address.

How do I revoke a DHCP lease in the 10.8.4 server app?

Similar Messages

Maybe you are looking for