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Thread ID: 140106 2015-08-18 06:28:00 Creating a Subnet in Server 2012 AppleFan (17097) Press F1
Post ID Timestamp Content User
1406997 2015-08-22 04:11:00 Do you sit the exams for a fee, chief? linw (53)
1406998 2015-08-22 07:40:00 Sorry ran out of time whilst editing.... my post in full...

You may be confusing the concepts of subnet and sub-domain

subnet - simply put a "sudivided network" within an IP range.

So for example... let's say your network is 192.168.1.0/24 - this is "standard" class C address range and only has 1 available subnet which allows 254 hosts.
so IP range - 192.168.1.1 - 192.168.1.254
network mask 255.255.255.0
192.168.1.0 = indicates the network subnet i.e. the start of a network
192.168.1.255 = is the broadcast address of the network

If we take 192.168.1.0/25 - still a "class C" address but because of the /25 it has 2 available subnets which have 126 host addresses available each.

So here the networks would be;

1st subnet
192.168.1.1 - 192.168.1.125
subnet 255.255.255.128
192.168.1.0 - indicates the network subnet
192.168.1.126 - broadcast address

2nd subnet 192.168.1.128 - 192.168.1.254
255.255.255.128
192.168.1.127 - indicates the network subnet
192.168.1.255 - indicates the broadcast address

Domains also have a hierachical structure;

Forest----->domain (you can multiple domains in a forest)
|
|------>domains can have subdomains within them. Such as this...

top level domain = pcworld.co.nz
subdomain = pressf1.pcworld.co.nz etc

So coming to your question about setting up subnets within a domain... If I understand correctly you're referring to having each of your DC's on a "different" network?

To achieve this you setup your subnets on your network - i.e. configure routers and switches with the various networks, VLANS (if applicable) etc.
Then on your primary DC you need to add these configs to DNS/DHCP etc and also configure statics routes on your network interface.

If you're using replication the DNS/DHCP settings will filter through to the other DC's if your secondary is a backup to your primary then the DNS/DHCP configs should be the same.

Note the network interfaces will have different configurations in terms of IP address and each DC should have a static route added for the other 2 networks. You shouldn't need to add the default route for that network as it willalready have been added when you configured the network interface at the start.

So you can have each of your servers on 3 different subnets but still have them able to "communicate" with each other via routing configs etc.

Caveat I'm no expert but this is how I've done it at home and have not had any issue. Though to be fair it wasn't exactly an advanced config I was going for.

Good luck



Hey chiefnz thanks so much for help , much appreciated . I do understand it now .
So thanks once again .
AppleFan (17097)
1406999 2015-08-24 04:18:00 Do you sit the exams for a fee, chief?

Uuummm generally, all vendor exams are at a cost yes.

If the vendor does mandate a compulsory course (like VMware does) some providers such as Auldhouse computing will include a single "shot" at the exam as part of the course fees... and yes you guessed it these courses are like $5K and up possibly more nowadays.

Microsft doesn't mandate sitting a compulsory course for it's certifications (yet) though one of the biggest differences is that "most" MS certifications require more than one exam... the only caveat here is the MS Certified Professional accreditation which you automatically gain after successfully completing any applicable MS technology exam. This is kind of neat because it gives you some sense of accomplishment as you go from exam to exam the other thing is MS certifications don't really expire but the technology platform the certification is for can become obsolete - so you do get at least 5-7 years "use" out of your certification.
chiefnz (545)
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