RE: Random DHCP disconnects
From: TJ Campana [MSFT] (tcampana_at_online.microsoft.com)
Date: 04/13/04
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Date: Tue, 13 Apr 2004 15:14:40 GMT
>Ever since a few days ago, my DSL(NOT WIRELESS) router modem has been
>resetting on me. When I look in the windows event logs, I'm seeing
>this.
>
>Event Type: Error
>Event Source: Dhcp
>Event Category: None
>Event ID: 1002
>Date: 4/2/2004
>Time: 9:51:12 PM
>User: N/A
>Computer: DESKTOP
>Description:
>The IP address lease 192.168.1.2 for the Network Card with network
>address 002003F3V122 has been denied by the DHCP server 0.0.0.0 (The
>DHCP Server sent a DHCPNACK message).
>
>I can't really figure out why all of a sudden this is doing this.
>I didn't do any major changes to the system.
>Are there any services that might be disabled that might contribute to
>this?
>I know it's a very vague question.. However it just started out of the
>blue. Not sure why or where else to look.
>
>Thanks
>
Kaishain,
Is the 192.168.1.2 the IP Address that you client machine is requesting. The message indicates that the DHCP does not like this lease request by the
client. Is this lease a reservation created in the DHCP Scope?
What is the result if you manually release and renew the IP Address lease from the command prompt?
ipconfig /release and ipconfig /renew
What is the type and brand of the NIC and is it at the latest driver. The DHCP addressing process is a very simple broadcast based process. If you are
having an issue obtaining an address then i would check to make sure that there are no issues with the NIC:
1. Force the NIC on the client to a specific Duplex and Speed.
2. Force the same duplex and speed on the switch if the switch is managed for both client and server connections.
3. Force the NIC on the DHCP Server to a specific Duplex and Speed.
If this does not resolve the issue for you then i would suggest that you check to see if there is a reservation set for this client. Reservation is based on the
client MAC and there may be an issue that you simply have to recreate the reservation.
Check to make sure that the DHCP Client service on the affected client is started and that the service type is set to automatic from the Services Tab
under Computer Management.
T.J. Campana [MSFT]
Microsoft EPS Networking
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