Event ID 20287 error is repeated many times and record in events.

Question

_{Thursday, June 1, 2017 8:40 AM}

A user's company restrict all clients on network. Their DHCP Server is using reserved IP address for all clients. They input all computer's MAC address and assign IP address on DHCP Server - Reservations. So it won't has available IP there.

Recently, they find that there are many repeated events record in MS-Windows-DHCP-Server/Admin as below.  Almost repeated record here for every several second

Log Name:      DhcpAdminEvents
Source:        Microsoft-Windows-DHCP-Server
Date:          6/1/2017 4:18:26 PM
Event ID:      20287
Task Category: None
Level:         Error
Keywords:     
User:          NETWORK SERVICE
Computer:      GMDC02.USSD.LOCAL
Description:
DHCP client request from 52415320002618E4541D000000000000 was dropped since the applicable IP address ranges in scope/superscope USSD_DHCP are out of available IP addresses. This could be because of IP address ranges of a policy being out of available IP addresses.

Log Name:      DhcpAdminEvents
Source:        Microsoft-Windows-DHCP-Server
Date:          6/1/2017 4:18:24 PM
Event ID:      20287
Task Category: None
Level:         Error
Keywords:     
User:          NETWORK SERVICE
Computer:      GMDC02.USSD.LOCAL
Description:
DHCP client request from 002264999644 was dropped since the applicable IP address ranges in scope/superscope USSD_DHCP are out of available IP addresses. This could be because of IP address ranges of a policy being out of available IP addresses.

How to troubleshoot this issue? Please advise. Thanks.

All replies (1)

_{Friday, June 2, 2017 10:04 AM ✅Answered}

Hi,

Does  MAC address of GMDC02.USSD.LOCAL  input on DHCP Server – Reservations？

If it doesn’t input on DHCP Server, the Event 20287 is normal.

If it input on DHCP Server, please check loopback(ping 127.0.0.1) and restart DHCP service in GMDC02.USSD.LOCAL

Event 20287 may be caused by GMDC02.USSD.LOCAL sending request packet in short interval time.

You can use Network Monitor to check DHCPrequest packets.

Microsoft Network Monitor

https://www.microsoft.com/en-sg/download/details.aspx?id=4865

Best Regards,

Frank

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