Lets sum up VLANs really quick. VLAN - segmenting a network/subnet so that broadcast are contained to that segment where segment traffic is handled by a router.

Problem - Unicasting of Windows NLB Service causes switch flooding.

Solution - You guessed it VLAN!

So your working with a 10.1.1.0 subnet and you need to stop the broadcast or ARPs from select computers from coming across your network. We are going to take my problem and explain it out for this.

Server IP range on my subnet is 10.1.1.5 - 99, DHCP is 10.1.1.100 - 199, and printers are 10.1.1.200 - 254. Our current mask is 255.255.255.0. Our NBL is located at 10.1.1.70 - 89.

Here is where I run into trouble. Should I leave the network at 10.1.1.0/24 and just subnet the NBL out of that and put it on the VLAN1 of the switch?  If I try and subnet the 70 - 89 range it doesn’t work with the math.  I can how ever change the IPs all togeather and then creat a subnet on the VLAN.

I have had trouble finding out what I needed to know for the basics on the internet.  It seems that everyone wants to explain it in a very complicated way.  Can’t we just make something simple for once.

I will try it with out subnetting and see how it goes.  Maybe the switch that I’m using will handle such.