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DHCP Server service goes down

The past two days i have experienced an issue with my DHCP Server service just turning off! I am able to turn it right back on with no issue but some end-user who's machines were attempting to renew were not connecting. Rebooted the server last night verified all services started back up fine then this morning a few moments ago same issue. In the event log i am seeing an event ID 10020 (This computer has at least one dynamically assigned IPv6 address.For reliable DHCPv6 server operation, you should use only static IPv6 addresses.). We are not currently using IPv6. The id gives me no real reason and its IPv4 that is being affected cause the service goes off. Any ideas?
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Bob Hood
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Bob Hood
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1 Solution
 
Joshua GrantomSenior EngineerCommented:
If you look under your IPv6 DHCP Scope does it show any clients?

if you are not using DHCPv6, make sure there is not a scope defined for IPv6, Under your network adapter settings, you can also disable IPv6
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Bob HoodSenior Network AdministratorAuthor Commented:
Joshua thank you for the speed response. There are no users under the scope. IPv6 has no scopes under it and is currently disabled on the NIC for this and all of our servers. I suppose i could disable IPv6 completely but with having everything set the I stated above i don't see whats causing it.
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Radhakrishnan RITCommented:
Hi,

Any other device acting DHCP role (I.e - Wireless Router, Firewall etc). Are there any error in Event logs?
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Joshua GrantomSenior EngineerCommented:
That was going to be my next suggestion. Another reason DHCP would turn off is that It is detecting another device trying to give out addresses.
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Bob HoodSenior Network AdministratorAuthor Commented:
The only error in the logs in my logs pertaining to DHCP is the event ID 10020. As for a device handing out IP's firewalls switches and waps i  have verified that DHCP is disabled.
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jkaiosIT DirectorCommented:
The past two days i have experienced ...

Was there any new software installed recently on the server within this period?  Device driver?  Antivirus?  Firewall?

Maybe some hardware is failing, such as the NIC?

Maybe unplug the other devices (just to be sure nothing is interfering with your DHCP) for a short period and see if the problem persists or goes away.
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jkaiosIT DirectorCommented:
You might also want to verify that the DHCP server has static IP address configuration.
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Bob HoodSenior Network AdministratorAuthor Commented:
Thank you for all your responses... it was a hidden VSS script that was causing the Service to turn off and was turning it back on. amended the script to turn the service back on works fine now.
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Joshua GrantomSenior EngineerCommented:
I'm glad you got it sorted!
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Bob HoodSenior Network AdministratorAuthor Commented:
The item was specific to my environment. Unknown till further digging
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