2012R2 - DC DNS and DHCP on one Server

[karan_jhr]

Hi:

I have recently upgraded the domain to 2012 R2.

My DC and DNS is running on one server. Can i have DHCP on the same one?

Currently i have a dedicated DHCP server 2003

 

Is it recommended to have All three DC + DNS + DHCP on one server?

 

Since in Server 2000 and 2003 it wasn't considered a good practice

What does 2012R2 says about it ?

 

Thanks

[FN-GM]

You will be fine. All our DC's are DNS and DHCP servers as well.

[3s-gtech]

Same here. I like to split roles, but these three sit nicely together and none are demanding on the hardware in most situations.

[bashy]

Have 2 dc's with all roles on each

[karan_jhr]

Since in my current situation i have a separate DHCP server, when i will move the roles to the DC/DNS shall i update the DNS records as well or changing the roles will bew enough

 

what will be the steps to be considered in order to shift it to new 2012R2

 

thanks

[bart21]

Dc, DNS and dhcp all sit nicely together on the same box. Also with dhcp in 2012 it is easier to provide HA. The old method of a manually split scope across 2 servers is now gone. you can now load balance dhcp across 2 servers. This is all handled by the dhcp server and does not need external components such as nlb. Works really well too.

 

Nick

[karan_jhr]

Please explain this point as well

 

Since in my current situation i have a separate DHCP server, when i will move the roles to the DC/DNS shall i update the DNS records as well or changing the roles will be enough

 

what will be the steps to be considered in order to shift it to new 2012R2

 

thanks

[3s-gtech]

You will need to manually change some settings in the DNS and DHCP MMCs (they'll be fairly obvious), and you'll need to change the DNS settings on anything with a static IP address (if you old DNS server is being removed).

[Davit2005]

I'd also put all three on same servers.

 

Either setup DHCP in 2012 R2 for load balancing or split the scopes between 2 DHCP servers, with your DC's, DNS and DHCP on 2 servers it will give you good resilience and you needn't worry about one being off line for updates occasionally if these are the only roles being done by the servers..

[Michael]

I always put all three on the same server instance. Most of us operate with a handful of servers per site, so have little choice but to put it all on one box.

 

Even in large networks, AD/DNS/DHCP still use relatively low resources. It's more about the processing/network speed of the server with many thousands of connections.

[SHimmer45]

As others have said +1 for this