DHCP server not updating the DNS

[SteveB_NI]

I've got a problem here on Server 2008R2 I'm hoping someone can give me pointers on how to resolve...

 

Our servers got reset over half term due to power failure, and since then I've noticed a few problems with our web filtering software in particular, but I'd put that down to user error... today however I've discovered that my workstation - is named STL-001, but is actually appearing as STL-140 whenever I use nslookup within Cmd prompt on my machine.

 

I'm assuming that it is to do with the DHCP server not updating the DNS when allocating addresses.... it appears to be giving the stations incorrect DNS records? Does that make sense? If so - how do I go about resolving this?

 

Newbie to Server 2008R2 so excuse my ignorance!

 

Thanks!

[anthonyd]

Hard to pin it down exactly without looking at the server direct but I'd imagine it's down to DNS scavenging not being turned on from the DNS server, and is your DHCP server set to update the DNS?

[sted]

on your workstation id rey

 

administrative command prompt

ipconfig /flushdns

 

see what happens

 

might be worth foing ipconfig/all see where its getting dhcp/dns from incase theres a n other server out there

[SteveB_NI]

Anthony - I know I definitely didn't turn DNS Scavenging off - would this have been possibly caused by a server reboot? I don't even know how to look for that one!

 

Sted - flush DNS didn't work unfortunately

[SHimmer45]

does the DHCP role has credentials set to update the DNS server? think this might only apply to clients that dont request the DNS update themselves.

[sonofsanta]

Check the DNS dynamic updates credentials - DHCP> [server] > IPv4 > Properties > Advanced > Credentials button