DNS/DHCP Installation - Need Clarification


I’m a little green on the SysAdmin side of things, so please be gentle if these are dumb questions. I’m going to be migrating DHCP from a NetWare 6.5 SP8 box and DNS from a Server 2k8 box onto one SLES11 VM. I’ve been poring over the documentation for DNS/DHCP implementation and trying to figure out exactly what the process will entail. I’ve come up with a few questions:

1: Due to the fact that I am migrating DHCP and not performing a fresh install, in what order do I install DHCP in SLES? Do I install it before and migrate or will the installation of DHCP occur during the migration? From the docs it felt like much of the initial DHCP configuration would be redundant if a migration was performed on top of the install. Perhaps I’m just not understanding the process.

2: Is there a preferred order to installing DNS and DHCP on the same VM? Which service should be migrated first?

3: Considering there will be two services running on the same VM, what kind of hardware should I assign to it? Storage? RAM? Processors? I know this is subjective to the load being placed on it, but where would you start?

Any input is greatly appreciated.


Hi coreyhansen,

since you mention DHCP “migration”… are you actually talking about “SLES11” or is it “OES11”? I wouldn’t know any tools to easily / automagically migrate DHCP nor Win2k8 DNS data to a native SLES11 server (which may simply be a lack of information on my side).

If you’re looking at OES, I suggest you switch over to https://forums.novell.com/forumdisplay.php/431-OES-L-Install and repeat your question there. While OES does use SLES as its base OS, it has a lot of add-ons (i.e. in the area of DHCP and DNS) that make management different from plain SLES.

If, OTOH, you’ll be running plain SLES, you can just install DHCP and DNS server software during system install and then configure based on your existing data. Of course there may be tools available to assist in that migration, but their use severely depends on the type and amount of configuration in your existing servers.

DNS and DHCP both don’t need much resources, on top of the base OS. If you start using database backends (as opposed to plain-file configuration), demands may increase a bit… and of course things depend on how many hosts will use these services and to what extend (in case of DNS). If I set up an additional DNS/DHCP server, I usually don’t plan any extra sizing for these two services, just the plain server.