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Windows 8.1 Ignoring DHCP ACK while attempting to renew DHCP Lease.

Q: Windows 8.1 Ignoring DHCP ACK while attempting to renew DHCP Lease.

I have several windows 8.1 machines connected to a private network. The clients all obtain their first DHCP leases correctly and work well for a time. At some point after having been running for awhile, they get into a state where they start
ignoring the DHCP ACK messages from the DHCP server when they attempt to renew their leases (see attached pcap file). They go on ignoring the responses to their DHCP Requests until they lose their IP addresses and then send a DHCP Discover and receive
a DHCP Offer. At this point, they seem to accept their new address and move on until it is time to renew again, at which point they start ignoring their DHCP ACKs again and the cycle continues. These machines will work for hours with no problems
whatsoever, but they all seem to experience this issue at some point every day. When they get into the state where they are ignoring their DHCP acks, they will stay that way until they are rebooted. Disabling and then re-enabling the adapter does
not seem to fix the issue.
Does anyone have any idea what could be going on? I'm pretty stumped at this point.

Thank you,

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Preferred Solution: Windows 8.1 Ignoring DHCP ACK while attempting to renew DHCP Lease.

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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. 

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Ok, Toshiba Satellite, unsure of model. XP Pro, all nicely updated. Intel Pro 2200 BG internal wifi card. Using the Intel Wireless manager.

Hadn't been able to get a good address when attempting to release/renew on the card. Tried everything I could think of, updated the drivers, removed encryption from the access point, tried connecting to a different network. Nothing would make it get a new (proper) address. Except for one thing, when the driver was reinstalled, it would properly get an address via DHCP and work nicely. Reboot, then nothing, won't get a proper address no matter what.

Swapped in the wifi card from my laptop, Intel 2915 ABG, it's based on the same driver. Detected the card on boot-up, Winblows installed the driver, connected very happily to the network. Reboot. Now it won't get an address.

This made me think. So, I went into the device manager, deleted the card, re-detected it, it joined the network no problem, and received a proper address via DHCP.

Any thought on this one?

Oh yeah, I also did a repair install of XP thinking maybe there was some Winblows update the broke things. No such luck.

A:Intel Pro 2200bg On Xp Pro Won't Renew Dhcp Lease

Have you tried connecting to the network manually when it doesn't give you an address?
Have you tried to recycle the router (remove the power cord from the router and turn the PC off, wait 3 minutes, turn the router back on, wait 3 minutes, turn the PC back on)?

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I have two PCs in two different locations of the neighborhood and each with a different Internet provider. Both are served by a radio link from the respective (different) providers (Antenna on the roof, Modem DSL box inside, Ethernet cable connection to PC).

The trouble arises at one location where the connection sometimes goes down briefly and then is back up but sometimes is gone for good. The provider then advises to cut off the mains power to everything (modem box, PC etc) and reconnect after a couple of minutes.

It usually works but sometimes it doesn't at all. Last night 3 times had no result. I contacted the Provider this morning who told me to disconnect/reconnect again and this time it worked. But he told me that they had done nothing their end and that the PC here had failed to renew DHCP lease. I understand what that is but my PCs at the other location have never had that issue (DHCP change is not so frequent with that other provider but this one here is expanding his customer list).

What bugs me is that the net goes down frequently with this one during a session but then comes up again, presumably renewing the DHCP lease all the time. Takes a coupla seconds, half a minute at most (DHCP changes quite frequently I know from a neighbor who often runs the config command).

I'm leery of the (usual) provider take that the fault lies/lay at my end.

I've only been working on this one for about a week so I don't know the provider's track record... Read more

A:Solved: PC fails to renew DHCP lease?

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I have a machine which seems to fail to run GP update after it's DHCP lease has expired and renewed. The machine will display a black background on the desktop window. The machine is a laptop running Windows 7. The user informed me that she lost connectivity
and rebooted her machine. After login and the Desktop window was black. In our environment we have all machines perform Dot1x authentication using Windows native supplicant, Cisco switch as the authenticator, Cisco ISE as the authentication server. From the
authentication server and Cisco switch logs, the laptop was successfully authenticated and received a valid IP within the subnet that it should be in. Is this an issue with authentication, DHCP, DNS, or something else?

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Hi all, I have a problem with my laptop (Inspiron 1545 Windows Vista 32) that it disconnects briefly from the internet every 30 minutes. I believe I've tracked the problem to the DCHP Lease. It is only for one hour, so every 30 minutes (half of the lease time), it tries to refresh it so the lease doesn't expire. I have a Netgear WNR2000 router, but my wired PC's DHCP lease is 1 day, whereas my laptop's is 1 hour. Please let me know if you need any other information to help me extend my DCHP lease. Thanks!

A:DHCP Lease problem

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We are having a problem with our DHCP renewals. At 50% of the lease the comp tries to renew it's address and we get the following entries in the Event Viewer:

Event ID:1003
Your computer was not able to renew its address from the network [from the DHCP Server] for the Network Card with network address 00104B67D185. The following error occured:
The semaphore timeout period has expired. Your computer will continue to try and obtain an address on its own from the network address [DHCP] server.

Event ID: 1007
Your computer has automatically configured the IP address for the network Card with network address 00104B67D185. The IP address bing used is (default).

Event ID: 2505
The server could not bind to the transport \device\NetB T_Tcpip_ {BA16FD88-B75B-49E1-8F07-2CFD4F0FB2DC} because another computer on the network has the same name. The server could not start.

This last error terminates ftp and telnet connections.
Our DHCP server is NT4.0. The clients are W2K and NT4.0.
Appreciate your thoughts. Thanx.

A:dhcp lease renewal

Is the DHCP service actually running on the server? If so what lease duration is set on for the DHCP scope?

Renewing after 50% of the lease time is standard in Windows, and the way to extend the interval is by increasing the duration of the lease.

An IP address starting 169.x.x.x is what you get when the client times out after looking for a DHCP server that isn't responding to network requests. That's why I ask whether the DHCP server (or the service) has crashed. Even if the server itself hasn't gone down it would be worth stopping and re-starting the DHCP service.

the last error maybe caused if a computer either has the same NetBIOS name or IP address on the same netwrok segment. Check how your scope is configured, and that you have enough addresses for the number of clients accessing the server and requesting IPs.

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Having a very frustrating problem.

Heres the scoop i cant get a good IP address from my DHCP server. It's an at home network and Ive been able to get this network adapter to work before with x64 but not with this particular machine (Upgraded). First it take forever to aquire an address and sometimes it gives me "limited or no connectivity"

Here's ipconfig /all you'll see some issues.

Host Name computer
primar dns suffix.........(blank)
Node Type................Unknown (This cant be right)
IP Routing Enabled..........NO
WINS Proxy Enabled........NO
DNS Suffix Search List...........WorkGroup

Ethernet adapter wireless network connection:

Connection-specific DNS suffix .......WorkGroup
Description........Ralink RT2500 Wireless LAN Card
Physical Address...............00-12-17-8e-12-43
DHCP Enabled................Yes
Autoconfiguration Enabled......Yes
IP Address........
Subnet Mask...........
Default Gateway......
DNS Servers...........
Lease Obtained.....Wed, Jan 10 2007 10:36:05PM (heres the problem)
Lease Expires........Wed, Jan 10 2007 10:36:04PM (Got no clue whats wrong)

Im thinking it's an easy fix or a Critical system shatering malfunction. Im using other computers that get normal leases that are good for about 8 days and my access point shows my problem machine getting a good IP lease. I looked up the "Unknown" Node type issue and microsoft said something about registery keys for &... Read more

A:DHCP Lease Problems

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So I've been getting ddosed recently and my ISP will not change my IP, they've told me to shut off my modem/router it's a 2 & 1 for 5 mins/hour, I've done that.

My DHCP Lease Time is 24hrs, could I make it 1 hour and shut off my router for 1 hour and have a new IP? Can anyone explain this to me?

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OS: Win98SE
Modem: RCA/Thomson DCM 315 (cable modem)
ISP: Comcast

Today, out of the blue, one computer can no longer access the internet. I have two computers connected to the same modem, a laptop via USB (the one with problems), and a desktop via RJ-45. The desktop connects to the internet just fine--in fact, I'm using it to ask this question. For some reason, however, the laptop refuses to get a DHCP lease.

winipcfg always yields an IP beginning 169 (meaning: "DHCP lease failed"). I can't even release an IP (is this standard behavior for 169 IPs?). I've tried switching USB cables, and even switching the USB for the RJ-45. I've tried uninstalling and reinstalling the modem drivers. I've tried restoring an old registry. And yes, I've rebooted zillions of times. Always the same thing: DHCP lease fails. My ever-useful modem guide suggests harassing my ISP, but since the desktop works fine, I doubt it's on their end.

This setup has been working (albeit with a hitch here and there) for months.


~Modem cycle fixed it.~
Sheesh. "Sorry" and "Thanks" all at once.
*mumbles about 'puters and feels stupid*

A:DHCP lease errors, out of the blue

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I have a VPN gateway device that I need to install that requires a static IP. The cable modem provider will not give out a static IP no matter how much I beg. So here's what I was thinking. Currently I have a Cisco router in the network that I want to replace with the VPN gateway. The router is DHCPing an address from the ISP and it has been the same address for over a year now. I was thinking of just programming the VPN gateway with that address and sticking it in there. But I would assume that the once the dhcp lease expires and the dhcp server puts the address back into the pool problems could arise and a call from the ISP would be expected. So, to overcome this I was thinking it would be nice if there was a utility out there that could maintain a dhcp lease for another device and renew it as needed so that the IP address doesn't change. Is there such a utility? If so, where can I get it? I would prefer something I could stick on a Linux box since I have a couple of them connected direct to the cable modem (via a hub). All the other computers and devices are sitting behind the cisco router. Or, if nothing is available is there any other work around?


A:Having another computer maintain a DHCP lease

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Ok, I've read the rules, had a quick search for some of my keywords and seems well for me to post.
I have just installed a new graphics card, soon thereafter I started getting problems with art programs and if I opened several pictures at once across any browser (I think, although I was mainly using firefox). Of course recapping what I had done I realised that I had not uninstalled the old card, long story short I uninstalled it, got the new one reinstalled and the browser problems stopped, or so I thought.
I quickly noticed that the Art programs still didnt work, and (although less frequently) the browsers still expierence some problems.
The Error symptoms are: Computer freezes, no access to anything, Mouse doesnt move and After afew clicks the computer will beep at me, On the art programs about 2/3rds of the image will Flash, or turn black entirely about every 4 seconds.
Annnnd the error log says:

"The ip address lease "ip" for the network Card with network address "network address" has been
&#000a;denied by the Dhcp server "similar ip" (the DHCP server sent a DHCPNACK message),
So, I think thats about where I stand. Soon after this I realised that every time this happened I was in fact online. (should have noticed earlier).
Im on a dynamic ip and using a linksys router (aren't I the fool), and thats about everything I think I can give you information wise. If anyone can h... Read more

A:Dhcp Ip Address Lease Denied?

This is strange, what kind of card did you pull?


what kind did you add?

the more details the better

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Hey guys,

Before I begin I just want to say that my computer knowledge is quite minimal so please forgive me. I know you are all busy so I will do my best not to waste your time. I have read every forum I could find on these topics and tried most solutions I could work out (see list below)

Basic problem: lost internet connectivity 2 days ago. I was using the internet fine and then when I came back a little while later it would no longer work.

- computer: old Asus F3E series intel centrino
- Windows Vista
- router/modem: unfortunately I am travelling and staying in Paris at the moment so my internet was essentially an open wifi network which to connect usually you go to the wifi network, connect to the specific one and then when you open the browser it takes you to the landing page where you type in log in and password. These were provided to me by the landlord so it's not my account and I have no idea where the router/modem is unfortunately.

After much reading of forums and attempting of solutions, I went to event viewer in admin, which confirmed my suspicion it was a DHCP problem. The event viewer on the day the internet stopped working said "Your computer was not able to renew its address from the network (from the DHCP server) for the Network Card with network address 0011xxxxx. The following occurred: The semaphore timeout period has expired. Your computer will try and obtain an address on its own from the network (DHCP server." Also ... Read more

A:DHCP connection/ IP lease problems, please help!

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im using a d-link di-604 router to share a broadband connection(cable)between two pc's. under the dhcp tab, dhcp server is enabled, there is starting and ending ip address and lease time which is set to one week. what does this lease time thing mean? sorry newbie question.

A:DHCP Server Lease Time

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I need to do a net use when an IP is assigned via DHCP. The only way that I can find to do this is to schedule a task based on a logged event. To do this I need to specify
the log (I picked "Microsoft Windows DHCP Events/Admin")
the source (I picked Dhcp-Client)
the event ID (this is what I can't figure out)
I looked at the logs with the Event Viewer and found a bunch of dhcp-client log entries but none of them were "successful IP lease" or words to that effect.

I get tons of these: (50067) Dhcp has received network hint 146514C4F4E4 for the Network Card with the network address 0x4025C2636874

and, while meeeing with the router) a few of these: (1001) Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x4025C2636875. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.

but I never saw something indicating a successful lease and I know there was one or I couldn't be posting this question!

OR IS THERE A BETTER WAY to schedule a task when an IP is assigned?

A:What is event ID for dhcp-client IP lease? (Or ia there a better way?)

There is event id 50058 from DHCP that says Your computer was successfully assigned an address from the network... I have to say that I've never seen it in a log. Do you need to know when a new IP is assigned? Or simply when it gets TCP/IP connectivity?

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I've become the unofficial network admin at my work place, we are having some network connection issues and I have no idea what's causing it. This problem only started occuring about 3 weeks ago, there haven't been any changes made to the configuration of the network. The network has 1 linux server, 7 computers, and 2 network printers. The router we are using is a D-link DI-604, there are 2 d-link switches connected to it, as well as a d-link DWL-900AP+ wireless access point. Sometimes when we arrive in the morning and turn on the computers, some of the computers cannot acquire a network address. Loading the router configuration page shows the dhcp server leasing IP's to an unknown device, screen shot is attached.
The mac addresses of all known devices connected to the network (computers, printers, server) begin with 00, i don't know what the device with mac address beginning with 52 is but the dhcp server is leasing all the unused ip's to that device.
Anybody have any ideas?

A:auto dhcp ip lease to unknown device?

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I'm on ADSL, and the provider automatically renews the IP every 4 days. Under Win XP, I simply had to click on the network icon in taskbar (lower right corner) and the window showed me since how long I had been connected (and thus if there was a risk of getting disconnected soon or not).

How can I easily get to the same info under Win7 ? (Win7 Ultimate x64)

By "easily", I mean without having to use cmd > ipconfig all
Many thanks in advance.

A:How to find out DHCP lease time remaining ?

Quote: Originally Posted by BouhPwet


I'm on ADSL, and the provider automatically renews the IP every 4 days. Under Win XP, I simply had to click on the network icon in taskbar (lower right corner) and the window showed me since how long I had been connected (and thus if there was a risk of getting disconnected soon or not).

How can I easily get to the same info under Win7 ? (Win7 Ultimate x64)

By "easily", I mean without having to use cmd > ipconfig all

Many thanks in advance.

You don't get disconnected at all!! How do you mean?

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Hello! After weeks of my own investigation and trial and error, I have come to you guys for, hopefully, an answer.

First off, my Laptop is about nine years old, HP Pavillion Pentium 4. I run Windows XP Home Edition Version 2002 SP3. I use a broadband card from Verizon that I just put in my USB (no router, etc) I'm getting a System Error Source DHCP Event ID 1002. When this happens, my computer, I believe, is going into sleep mode and I have to reboot the system. When I turn it back on and go back on the internet, all my websites that I was in are still there.

The error says: The IP address lease for the Network Card with Network address 2c3068c16ED1 has been denied by the DHCP Server (The DHCP Server sent a DHCPNACK message)

It gives an explanation too: The DHCP Server Service did not extend the lease on your computer's IP address, so your computer temporarily lost its connection with the Network.

OK, so here are all the things I tried. I tried the ipconfig /release and ipconfig /renew. I tried going in services.msc and going under DHCP and keeping it automatic but stopping it. I called Verizon and I believe he refreshed my Network settings (I think I knew more about the topic than he did) He said it was my computer, whatever. I just tried the static IP but it didn't seem to take. I restarted and it jumped back to automatic. My last guess is it's something to do with the time frame of when it automatically obtains the addre... Read more

A:IP Address Lease Denied by DHCP Server

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Can someone please tell me how to change my LAN DHCP Lease Expiry time! Mines currently set at 1 hour and its driving me crazy!

A:How to change your LAN DHCP Lease Expiry time

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The IP address lease for the Network Card with network address 0xD0DF9AEDE650 has been denied by the DHCP server (The DHCP Server sent a DHCPNACK message). Log Name:      Microsoft-Windows-Dhcp-Client/AdminSource:        Microsoft-Windows-Dhcp-ClientDate:          5/4/2018 7:12:47 AMEvent ID:      1002Task Category: Address Configuration State EventLevel:         ErrorKeywords:      User:          LOCAL SERVICEComputer:      User-PCDescription:The IP address lease for the Network Card with network address 0xD0DF9AEDE650 has been denied by the DHCP server (The DHCP Server sent a DHCPNACK message).Event Xml:<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">  <System>    <Provider Name="Microsoft-Windows-Dhcp-Client" Guid="{15A7A4F8-0072-4EAB-ABAD-F98A4D666AED}" />    <EventID>1002</EventID>    <Version>0</Version>    <Level>2</Level>    <Task>3</Task>    <Opcode>76</Opcode>    <Keywords>0x4000000000000000</Keywords>    <TimeCreated S... Read more

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Probably this error is pretty much a non-issue and I haven't a clue if the affected W7P machine, even runs Windows Server 2008 R2 (or any windows server for that matter).

Is this 'server' thing, software that is by default installed (and I'm guessing it's only used when the machine networks with another machine, home/work groups)?

As for if and what version the W7P machine even 'runs', the only loosely provided instructions I've found (by clicking the event log's link to information about the error), results in a webpage...

Event ID 1001

..which sort of implies to me that the W7P machine might be running 'Windows Server 2008 R2', if only because the event log error report's link led me to that web page's article, ie; the article says it applies to Windows Server 2008 R2.

I tried following the article's mentions of checking to see what version of 'server' that is installed, but step 2 seems too poorly written for me to follow what's actually be said...

Determine if there is a network connectivity problem
To determine if there is a network connectivity problem between the‚ DHCP‚ server and domain controller:
At the DHCP server, click Start, click Run, type cmd, and then click OK.
At the command prompt, type ping server_FQDN, where server_FQDN is the fully qualified domain name (FQDN) of the domain controller (for example, server1.contoso.com), and then press ENTER.
What's unclear to me is where it alludes to...

"..where se... Read more

A:Event ID 1001 DHCP Client Lease Validity

I have been looking at the same page as you, and I too am just as confused about how to follow the instructions. It would be good to fix this problem, but how is it done?

My event viewer shows this error.
Event 1001, Dhcp-Client

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I installed my linksys wrt54G v1 router that has DD-WRT v32 SP2 on it and my network worked great. I then plugged in my linksys switch with about 20 devices (internet phones, networked printers, windows pc, linux asterisk phone system) already connected and on. Almost immediately my internet went down, I could not access my router hardly ever, and lan connectivity failed or was flaky at best.
The dhcp lease table did not show the new devices assigned except for several static assignments.

I unplugged the switch, power cycled the router and all was fine.
I then plugged in the switch without devices and worked fine.
I turned off all networked devices connected to the switch, turned them on one at a time. Then everything worked. The lease table showed all the devices with default lease time of 24 hours.
About 48 hours later I walked into the office with internet down, no lan connectivity, and could not log onto the router either.
I performed the same fix above, and now we are working again just fine.

I had the same problem with a stock linksys 8 port router and using either the linksys switch or a netgear switch.

I think I am having lease renewal dhcp issues, but I have never experienced this problem before. I would appreciate your advice to avoid the next network crash - it ruins my morning.

DD-WRT v23 SP2
linnksys WRT54G v1
linksys 24 port switch

A:DHCP lease renewal issues crashes my network

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I am cleaning up a laptop for a friend.
When i plugged it in to my router, i got an IP address and had internet connection. I installed AVG and it immediately found a virus that it called proxy something. I removed the virus and my LAN suddenly got an APIPA. I have had no connection since.

[sidebar: found over 60 viruses on the machine so far. . . ]

I installed a wireless adapter to see if i could get connection there, same thing. APIPA.

Tried to repair the connection and get "failed to renew IP address".
Tried ipconfig /release. Still APIPA.
Tried ipconfig /flushdns, said it flushed, still have APIPA.

The rest of the computers and printers all have ip's and internet access.

A:Solved: Can't get NIC to renew IP via DHCP

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Here goes, you will have to bare with my limited knowledge.

In my home I have a PC and a laptop. I have a wireless router and the laptop is connected wirelessly and the PC by ethernet cable through the router. Now all of a sudden the PC is having internet issues. It is connected to the internet but you cannot access email or internet, this has all happened seemingly out of the blue. The wireless network has been up and running for about 2 months maybe without problem.

Ok so I clicked repair on the connection and it was unable to renew the ip address. I went into the command prompt and it seems that its being assigned a default ip address and the default gateway is offline. I tried to renew address here however it said it was unable to connect to the DHCP... here is where im lost on where to go next.

The laptop is running on the network with no issues. I shall copy what is said after ipconfig /all

host name .... the-nxjno4724cy
primary DNS suffix....
Node type.... Unknown
IP routing enabled ... No
Wins proxy enabled ... No

Ethernet adapter local area connection 3
connection specific DNS suffix ...
Description .... realtek RTL8139/8107 family fast ethernet NIC
Physical Address... 00-08-55-44-FE-1A
DHCP enabled... YES
autoconfiguration enabled .. yes
autoconfiguration ip address ....
Subnet mask ...
Default gateway ....
I would also like to know why this has suddenly happened.

I searched about a bit for a solution, it seems quite a commen pr... Read more

A:cannot connect to the DHCP to renew ip address....

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Please help I have brought a second hand computer and been having terrible time connecting to the internet. My old computer was a HP Pavilion 7815 and I used an ethernet cable to connect my computer to the modem, but my new computer a HP Pavilion 730.uk has no ethernet slot so I have to connect the modem using the USB cable and it has me confused because I keep getting this when loading my broadband installer disc everything seems to start ok and then I get a messages saying this:

DHCP release/renew failed

you have 1 network adapter set to DHCP

USB cable Modem 351000 - Packet Scheduler miniport


There is one network adapter in the system and it is configured for DCHP, but it is unable to release/renew IP address: error code 94.


So after when I think I have installed the USB cablw modem 351000 I get this message.

The software you are installing for this hardware USB Cable Modem 351000 has not passed windows logo testing to verfiy its compatibility with windows XP.

I would appreciate any help on this problem also can someone tell me where I plug in my speakers in the back of this blinky machine it has no volume sign!

A:DHCP release/renew failed plus more

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hey guys, recently I got a wireless router, a d-link, Model D-615. This computer is hard wired to it, and another computer is using the wireless function. Every 30 minutes or so my internet stops working, and the only solution ( it happens to both pc's simultaneously ) is to go into my router config, and click on DHCP renew.
Are there any permanent solutions to this problem ?

A:Keep getting disconnected, DHCP renew is the only solution ???

Do you have a problem if you connect directly to the broadband modem with one of the machines?

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One a few rare occasions due to interference or power outages my wireless broadband connection from my ISP will go down. As a result my Mandrake 10 firewall it will loose it's DHCP address and I will have to manually down and re-up the eth0 to get connected again.

What I would like to do is to run a cron statement that will test to see if I have an active connection to my ISP's gateway (doing like a ping request) and if not then asume that the connection has failed and have it down & re-up the eth0 port automatically. Maybe this script should then sleep for 30 seconds and re-test for an active connection, if active then exit otherwise repeat the process again.

I'm having problems figuring out a good way to test for an active connection. Does anyone know of a good script command(s) I can use to ping the gateway for the test part of this script?

A:Wireless DHCP renew if disconnected

I think I'd try to figure out why Mandrake Linux is failing to renew the IP address...

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I can connect wired but not wirelessly. I get limited or no connectivity. When I try to repair I get the message "cannot connect to dhcp server. request has timed out" Here's my info:

dell vostro 1500
win xp sp3
wire2 router 2701hg-b

i've reset my router/modem many times
initially i thought my wifi adapter was bad but i bought a usb adapter with same results
here's the commands i've run:

ipconfig /renew
netsh int ip reset reset.log
netsh winsock reset catalog
netsh interface ip delete arpcache
netsh int ip resetc:\resetlog.txt

more info:

ethernet adapter lan2:
ip address: 192.168.1.xxxx
subnet mask:
default gateway:

ethernet adapter wireless network connection 2:
connection-specific dns:
autoconfiguration ip address:
subnet mask:
default gateway:

i've also disabled and enabled the adapter. i downloaded a free program that was supposed to fix any registry issues. i can't remember what it's called and can't even find it in remove programs. i've done a lot but i only started writing it down today. i appreciate any help and sorry if i haven't put enough information.

there's another laptop here that connects wirelessly.

A:cannot renew ip address, connect to dhcp

i downloaded a free program that was supposed to fix any registry issues.Click to expand...

If you ran the program it would be best to do a System Restore to just before it did its "fixes."

Disable encryption on the router and make sure MAC Address filtering is disabled and try to connect. If successful you can probably re-enable encryption and reconnect.

Do you have a non-Windows firewall with separate settings for wired and wireless?

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I found a couple of topics from google, but nothing gave me a very good answer to what I should do next, so I thought maybe it's best to ask the question directly:

Currently my internet isn't working (at a friend's house using his), and when I try to use ipconfig /release then /renew, it times out on me, saying: An error occured while renewing interface...: unable to contact your DHCP server. Request has timed out.

I tried using the XP Help and Support Center and ran a Network Diagnostics, and it failed getting n IP address for the DefaultIPGateway, DNSServerSearchOrder and DHCPServer. It did however manage to find my IP Address (...Huh??)

I've tried restarting the DNS and DHCP and rebooting the computers repeatedly, but nothing seems to have worked, and I seem to be out of ideas. Can anyone shed some light on this matter?

Thanks a bunch.

A:IPConfig /renew / DHCP Error?

TCP/IP stack repair options for use with Windows XP with SP2.

For these commands, Start, Run, CMD to open a command prompt.

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset TCP/IP stack to installation defaults. netsh int ip reset reset.log

It would also be useful to know the make/model of the router, and whether it's a wireless or wired connection. Did you disable encryption if it's wireless to see if that gets it connected?

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Error screen:

We are getting this error prompt after windows 7 OS TS completion during first boot of the laptop .Also laptop not installed with NIC & bluetooth drivers.<o:p></o:p>
Issue is only in a single site laptops in which Imaging worked perfectly until last week.i have found only below errors in BDD.log and setupact.log<o:p></o:p>

i have gone through some solution in msforum link below which says to add sleep time in litetouch.wsf file but unfortunately i cannot test that script changesin my environment


Is issue really from DHCP or MDT 2013 bug ? if its MDT bug then the above sleep time update will really work .Seeking your help to understand and to isolate this issue better.<o:p></o:p>


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I've been trying for so long to connect internet to my laptop. After using the ipconfig /release, ipconfig /renew, it said "An error occured while renewing interface Local Area Connection : unable to contact your DHCP server. Request has timed out". I am connecting with the cable directly from the modem. When I plug the cable inside my newer laptop, I have no problem connecting to the internet. My laptop that needs its ip address renewed has been turned off for around 2 years. So I'm guessing it may be considered a new connection by the DHCP server?

TCP/IP Properties "Obtain an IP address & Obtain DNS server address are already set to automatic. When I click on advanced it said DHCP is enabled.

When I look on Add/Remove Windows Components, the DHCP option isn't there.

The laptop is an HP ze4400 and the system is Microsoft Windows XP Version 2002. I'm using Comcast internet with an Arris modem. (Not sure if you really needed that info, but just to make sure.)

I'm not good at computer stuff, so please bare with me and give me a step-by-step example into solving this problem.

A:unable to connect to the DHCP to renew ip address

TCP/IP stack repair options for use with Windows XP with SP2/SP3.

Start, Run, CMD to open a command prompt:

In the command prompt window that opens, type type the following commands, each followed by the Enter key:

Note: Type only the text in bold for the following commands.

Reset TCP/IP stack to installation defaults, type: netsh int ip reset reset.log

Reset WINSOCK entries to installation defaults, type: netsh winsock reset catalog

Reboot the machine.

Connect the cable and do the following tests after the reboot.

Try these simple tests.

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

In the command prompt window that opens, type type the following commands one at a time, followed by the Enter key:

NOTE: For the items below in red surrounded with < >, see comments below for the actual information content, they are value substitutions from the previous IPCONFIG command output! Do NOT type <computer_IP_address> into the command, that won't work. Also, the < and > in the text is to identify the parameters, they are also NOT used in the actual commands.

Do NOT include the <> either, they're just to identify the values for substitution.


PING <computer_IP_address>

PING <default_gateway_address>

PING <dns_servers>


PING yahoo.com

Right click in the command window and choose Select All, then hit Enter to copy the contents to the cli... Read more

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I have a connection problem that really has me lost.

Here's what I CAN do:
* I can ping a local machine after start up before I release my ip address
* My Local Area Connection says I am connected and firewalled
* I can ping after start up before I release my ip address
* I can ping after start up before I release my ip address

BUT I cannot access the internet or ping a website

I then successfully release my ip address via cmd but cannot renew my ip address and still cannot access the internet. And after I release I can no longer ping any ip address.

I am trying to fix a friends Sony Viao desktop, model PCV-C11L that is running xp home sp3. I have dsl and I am using a d-link wireless router. My dsl and router work fine as I am running 2 other computers off of them sucessfully (wired and wireless). I am assuming it is not the ISP, modem or router because my friends Viao would not renew at his house or my house. It does not appear to be the NIC card either because I bought him a new NIC, installed it, and had the same problem.

Any help is greatly appreciated!!

I will paste what cmd is telling me...................


Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\my friend>ipconfig /all

Windows IP Configuration

Host Name . . . . . .... Read more

A:Cannot renew IP or find dhcp server after I release IP

The before sample looks normal; you can't ping internet sites?

try thisPing by address eg;
(which is google)
then Ping by domainName
ping google.com​BOTH should work (before release/renew)

As to failing to renew; that's typical of a router which needs a firmware update.

btw; how are you connected to the Internet (Adsl vs Cable)?

Go to your router config page (put the router address into your browser)
login, then find the WAN settings page.

TRY a release/renew on that page; it MUST succeed,

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I have a Linksys router model BEFW11S4V.2.

I have 2 laptops. Yesterday I downloaded a new software from a site called palace.com that is a virtual world type of site. Everything was fine until today for some reason I wasn't able to connect to the Internet. It says limited or no connectivity although the signal strength is excellent. I've tried several of the fixes mentioned on the Ask Linksys but I can't seem to get a connection although my other lap top is fully connected. I get a message that says that maybe the network hasn't assigned a network address to the laptop. I've tried ipconfig/renew and it doesn't respond. I'm not sure what I need to do to restore connection. It has the same issues with wireless broadband card and local area connection.

For what it's worth the Default Gateway is blank. Not sure if that helps in determining what's going on here.

Also, I turned off the windows XP firewall and uninstalled the Norton security and the palace software but to no avail.
Any help would be much appreciated.

A:Can't renew IP Address/No connection to DHCP Server

is this for both laptops ?

can you post an ipconfig /all for both machines and make sure we know which is which
also carry out the ping tests on both, again let me know which machine is which

makes and models of laptop
How the machines are connected to router
who the ISP is

the status of the lights on the front of the router
Ipconfig on Vista
Vista does not handle permissions the same as XP.
Locate the command prompt short cut in your start menu. Right click it, choose run as administrator, then try the ipconfig.

If you want to always have the command prompt run with elevation
Right-click the command prompt icon, choose Properties
Select the Shortcut tab
Click on Advanced
Check Run as administrator

How To Open Command Prompt From Right Click Menu:
Just hold down your Shift key and right-click anywhere on your desktop, in a folder or on a folder to open Command Prompt. The current location of Command Prompt will depend from where you open it.


its important to do all the ping tests

1) Ping the default gateway
2) ping google.com by the name
3) ping google using IP address

all details below
ipconfig /all

TWO Methods to do that - some people have problems with ONE----

ONE ---------------------------------
ipconfig /all

rightclick in the box
select all
control key + C key - to copy
then reply here and
control key + V to paste

TWO -----------------------------------------------

Start, Run, ... Read more

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So i got this problem with my linksys router

the internet stopped working. on both the wired and wireless computers.
they could communicate with each other fine, but could not connect to the internet.

so I plugged the modem directly in the computer and it works just fine.
done a reset on the modem, and the router (twice with same results, once from the button on the back, one from within the web interface) and nothing. Still internet dosnt work.

Router status shows this:


Firmware Version: v2.02.7, Feb. 27, 2004
Current Time: Not Available
MAC Address: 00:0F:66:91:37:F0
Router Name: WRT54G
Host Name:
Domain Name:

Configuration Type
Login Type: Automatic Configuration - DHCP
IP Address:
Subnet Mask:
Default Gateway:
DNS 1:
DNS 2:
DNS 3:Click to expand...

clicking DHCP Release and DHCP Renew does not bring back an ip to the router. tried many times, stays at

ISP: Videotron Cable
Router: Linksys WRT54G
Modem: Motorola Surfboard SB5100

What could be the issue???

Thank You

A:Linksys Router DHCP Renew not working

Remember to power cycle the modem when switching devices (from router to computer and vice versa).

Maybe bad cable between modem and router. Try a different one.

Maybe the router died or is dying. Try a hard reset to factory settings.

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Hi Guys,

I have been experiencing some irritating problems with my internet and creating a hosted network for my mobile devices. creating a hosted network was easy and has worked for quite some time until this weekend. Doing some quick google searches almost all the results said I should release then renew my ipconfig, and this is where all the real problems started. It won't renew and from there my problems keep coming.

My connection is provided by my university so there is no way for me to quickly reset the modem.

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.


Windows IP Configuration

Host Name . . . . . . . . . . . . : Reghardt-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : mshome.net

Wireless LAN adapter Wireless Network Connection 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter
Physical Address. . . . . . . . . : 4C-0F-6E-24-85-EA
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : sun.ac.za
Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
Physical Address. . . . . . ... Read more

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I just moved into a new apartment and my neighbor is letting me share her wifi internet. The password she gave me works, but when i connect to the internet it says there is limited or no connectivity. When I try to repair it says it cannot renew my IP address. I tried opening the cmd window and putting in ipconfig/renew, but it says that there is an error and it is anable to contact the DHCP Server and the request has timed out. The internet everywhere else works just fine however (I am at work right now and it works, and I went to an internet cafe and used it there without a problem as well.

Does anybody have any ideas of how to fix this problem? I would really appreciate it!

A:Cannot renew IP Address, Unable to contact DHCP Server

1. Check the wifi /router end of the connection is configured to be a DHCP server
2. Beyond that there can be many variables. I think you're best approach:
=== > Backup the wifi / router settngs (most devices allow you to backup their config to your hard drive. Check the user manual)
===> Remove all the restrictions that were added via the config (e.g encryption, MAC address screening, etc.
3. Verify you and neighbors computer all connect and work when no restrictions.
4. Add back restrictions one-at-a-time and retest the computers (yours and neighbors) until they all work and all restrictions have been applied

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Hi there, suddenly and without warning my internet stopped working. So I went online and found all these solutions that haven't worked.

I've tried fixing the TCP/IP, the ipconfig release/renew options. The netsh. Restarting my modem, calling my isp. Nothing seems to work.

Please help, just tell me what info I need to get to you.

A:Cannot renew Ip address and Unable to contact your DHCP server.

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Basically I have followed some of the other problems on this site but I have yet to find a fix to my Ethernet issues. when I diagnose the problem it says Ethernet does not have valid up configuration. After a suggestion on another thread I did ipconfig/release then ipconfig/renew and it tells me unable to contact your dhcp server. Request has timed out. Thankyou in advance for the help

A:Ethernet won't connect ipconfig/renew unable to contact dhcp

Please provide more information in regards to what operating system you are using and the make/model of your PC. In addition, using TSG's Information Utility will be beneficial to us. Run the tool and provide the output in your next post.

Based off your commands, I'm assuming you're running Windows.
1. Hit the Windows key on your keyboard
2. Type cmd and hit Enter on your keyboard
3. In the black box that appears, type ipconfig /all > %userprofile%\desktop\ipcfg.txt and hit Enter

What this will do is create a text file on your desktop that includes all your configurations in regards to your network interfaces. Please copy the contents of that file and place them into your next message.

Also, please provide more information in regards to your setup.
1. Are you connecting wirelessly or with a cable?
2. Are other devices on the network connecting to the internet without issues?

Lastly, you have marked the thread as solved for some reason. Please undo this. If the issue is actually resolved, please share how you resolved it.

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Hello, my xp has had the "limited/no connectivity" warning for a while but it did not effect my connection at all until recently. i have zero connectivity now on my vista and xp while connected to the router. (sorry in advance I'm not very knowledgeable with networks)
Its a wired network Modem(broadband) -> router(d-link di604) -> pc1(xp)/pc2(vista)
i cannot log into my router from my browser, i cannot renew my ip from cmd as it cannot connect to "dhcp server"

right clicking on my lan network icon and trying to repair does not work because it cannot renew my ip

i have also tried restarting, disabling and enabling network card, reseting and unplugging modem and router, crossing my fingers.

all the appropriate lights are on...

im not sure what other information regarding this i can provide

any help with this would be welcome
Thank you

A:Solved: di604 cannot log onto router, cannot /renew ip(dhcp unreachable), limited/no

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I need the IP address ,DNS and gateway address so on .Is it possibile to get it from the modems DHCP or do I need the ISP DHCP working?

I'm setting up are home network and getting connected to the internet but the internet connection is down .But is it possibile that I can get this from the modem. .

Like how does the computer talk to the modem and the modem talk to the DHCP server .I never had this problem before.

A:Can you get DHCP info from the modem software even when the DHCP server is down

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I'm running a simple network at home with a Linksys BEFSR41 router. I have two computers hooked up wired and a wireless router acting like an access point that I use for my laptop occasionally. Until this weekend I've been having no problems but I shut down the computers due to weather and now one of them is not able to communicate with any others on the network. The problem computer will get an address supplied to it by the router (DHCP server) but once it has it I cannot get any other connectivity. Of course this is hindering internet access on this computer. I can ping the loopback and assigned IP addresses w/o problems but when I ping the default gateway (router) and/or the other computer I get "Request timed out." I initially thought it was the NIC so I bought another one but still get the same issue. I've moved the cards to different PCI slots but no luck. I tested the cable running from the computer and the router but found no problems. I even tried resetting the TCP/IP stack but still didn't work. The computer in question is running WinXP SP2 with the original NIC being a Linksys LNE100TX and the new one being a D-Link DFE-530TX+.

Any clues on this? If more info is needed let me know--it's been a while since I've posted. Thanks in advance.

A:Solved: Getting IP addr from DHCP but cannot ping DHCP server

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Is it better to use Win2000 Server DHCP or DHCP from my Netgear wireless router?

I am currently in the process of setting up a Win2000 server on my home network which consists of four other 2000/XP machines.
The server is going to be configured as a domain controller and will utilize the Active Directory.

Should I use the Win2000 Server DHCP or stick with my wireless router as the DHCP server? What are the advantages/disadvantages to both and which would be easier to maintain.

Is a 550mhz PIII with 256MB RAM fast enough to make a good home server running Win2000 server?

The server is going to have (2) 120GB Western Digital 7200rpm drives with 8MB cache for storage and a single 60GB Western Digital 7200rpm drive for the OS and few other applications.

The server's primary function is to serve as a media server with an approaching 10GB of MP3 and music video files which is continually going to grow. Disk contention is at a minimum since there are only four PC's on the network. There will also be a lot of digital photos stored on the server and will also serve as a place to perform backups from the other four networked PC's.

A:Win2000 Server DHCP or Router DHCP?

We have a similar setup in our office using Small Business Server, a public IP coming into our router with DHCP turned on, connected to a NIC in the internal DHCP server (which is also running ISA). A second NIC in the server bridges to the internal hub to provide DHCP services to the clients. This way we control port filtering in 2 places and with 2 levels of NAT taking place we feel secure. It may be overkill but we're concerned that EVERYONE is trying to hack into ISA and DHCP servers connected directly to public IP that this setup provides an added level of security.

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My old hard disk was dead so bought a new hard disk drive of 500gb, when i tried to install windows xp on the new hard disk the cd didn't boot as it used to do first, it gives out an error during boot "PXE-E51: No DHCP or proxy DHCP offers were received please enter bootable device and press any key". Thanks in advance.

A:PXE-E51: No DHCP or proxy DHCP offers were received

Any message such as this referencing 'PXE" are likely indications that you need to adjust the boot device settings in the BIOS.  The message indicates that the system is currently trying to boot via network, rather than boot to an optical drive or a hard drive.
If you want to boot from a CD to install XP, then the first boot option in the BIOS must be changed to an optical drive.
If you want to boot from the hard drive, then the first boot device should be changed to reflect the hard drive as the first option.
What makes you think that your old hard drive was dead?
These PXE errors are often the result of the fact that the CMOS battery is dying or is dead and needs to be replaced.  Since this is a vital but cheap item easily obtained, this is not a serious problem.

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My WinXP Home PC won't connect properly (limited connectivity/no internet) via ethernet cable to my router (Belkin N150).

Ipconfig /all shows the IP address as but this is determined by an entry in the registry at HLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{39A...} > 'DhcpIPAddress' - REG_SZ - Also listed at 'IPAutoconfigurationAddress'. My laptop connects fine plugged into the same port getting it's IP automatically ( and getting internet fine.

After much searching I can't figure out what's wrong.

I've tried adding a DWORD entry 'IPAutoconfigurationEnabled' = 0, also tried deleting the 2 values.
Tried setting the IP manually to - limited connectivity goes away but I get no internet connection from the router nor file sharing.

Any help please?

A:Solved: DHCP IP by registry not by DHCP server??

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Okay, I got a new client a few weeks ago. What a mess...anyway, they had bought a new Dell with SBS 2K3 on it, and for some reason they have a wired firewall (Linksys), a wireless router (Linksys) and a small switch. After examining the setup of the network, I found the wireless router giving out IP addresses in the 192.168.1.X range, the SBS being what it is, was going to be the DNS/DHCP/DC, on and on, etc. I turned off the DHCP on the wireless router. Yesterday they called and had a machine that I wasn't aware of that couldn't connect, it's a proprietary machine for X-Rays, and all I could do was really look at it, and do a few things, like change the IP if needed, but it's set to DHCP, and it's getting 192.168.1.X addressing, when umm, it can't be. I did ipconfig /release then /renew, nothing, still the old address, with as the DCHP and gateway. I statically set it to the 192.168.0.X settings and nothing, can't ping in or out or see the network. I set it back to DCHP reboot, and it still gets 192.168.1.X address, but there is no DHCP server serving up these address, so ummm, anyone? Oh, the X-Ray comp is plugged directly into the firewall now wich is on the 192.168.0.X network on the inside.......

A:Solved: DHCP coming from a non-DHCP router?

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Our ISP just installed a DHCP server (we won't be using it, we have static IP address for internet). Our NT box has two NIC cards, one for local network, the other connected to our cable modem. It has DHCP server running for our local workstations to get their ip addresses. But it has been shutting down with an error message stating that "The DHCP server is shutting down because another DHCP server with IP address of is active on the network." is our ISP's new DHCP server. How can I get our server to ignore the ISP's DHCP server?

A:ISP DHCP shutting down internal DHCP

You need to make sure your ISP isn't trying to renew the DHCP lease and has your IP address excluded from their DHCP servers list of non static IP's. Sounds like their error and config problem not yours. Unless you haven't excluded your static addresses from your DHCP server pool.

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