Get the SolarWinds Advanced Subnet Calculator - it's free. This will help you a lot.
However, if you need to expand your network space, you need to be aware of a couple of things. As others have stated, your address ranges strongly imply that you're using a /24 netmask (255.255.255.0 in outmoded classful notation). You can't simply expand the middle of the three ranges, as you'll overrun one of the subnets on either end, depending on how you do it. Addressing aside, there's another consideration - Windows hosts are pretty chatty, and tend to emit a lot of broadcast packets and other traffic while just sitting still. I'll assume that what you're dealing with is a predominantly Windows environment. You'll need to be careful to measure the traffic in your subnet before expanding it too far, because if the subnet is too large, the broadcast traffic can clog the tubes. You'll probably be fine, but do be aware that it's something you should consider. Kurt On Thu, Jan 5, 2012 at 13:15, Troy Adkins <[email protected]> wrote: > With my lack of IP subnetting knowledge. I have the following need. > > If I have 10.100.10.x network, a 10.100.11.x, and a 10.100.12.x.. > > I need to expand my 10.100.11.x network from 254 to 508. Is that possible? > > Troy Adkins > Network Administrator > Virginia House of Delegates > General Assembly Bldg. Room 815 > 804.698.1567 (O) > 804.771.7917 (F) > [email protected] > http://legis.virginia.gov > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
