Ooops. I can't add. I realized after I sent my reply that the .156 subnet should be .160. Sorry about the confusion. ;-)
John ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag ---- On Thu, 13 Dec 2001, John Neiberger ([EMAIL PROTECTED]) wrote: > Hi Sarah, > > Your calculations were correct at the beginning but somewhere > toward the end the train went of the track. :-) > > If you need at least five equal-sized subnets, you're going to > end up with three unused subnets. > > You already figured out that by using two extra bits of > subnetting you'd get four subnets. Add one more bit and you'll > have eight usable subnets. > > In your last example, you have overlapping subnets: > > 1=65.85.105.0 255.255.255.128 > 2=65.85.105.0 255.255.255.192 > > You must not overlap subnets when doing VLSM. In the end you > should have the following subnets available: > > 65.85.105.0 > 65.85.105.32 > 65.85.105.64 > 65.85.105.96 > 65.85.105.128 > 65.85.105.156 > 65.85.105.192 > 85.85.102.224 > > These all have the same mask, a /27, or 255.255.255.224. > > I can't draw it out in text, but one way to think of subnetting > is to start out with a big circle. That's your /24. Draw a > line down the center and you have two /25s. Draw another line > across the middle and you now have four /26s. Take one of > those /26s and divide it in half and you now have three /26s > and two /27s. You could then further divide the /27 into > two /28s. > > This makes it very simple and helps you not to overlap prefixes > on accident. > > HTH, > John > > ________________________________________________ > Get your own "800" number > Voicemail, fax, email, and a lot more > http://www.ureach.com/reg/tag > > > ---- On Thu, 13 Dec 2001, Sarah Parker ([EMAIL PROTECTED]) > wrote: > > > Hello Everyone, > > > > I am working on a small IP address project and trying > > to figure out VLSM. > > > > Since I am not very good and do not have much > > experience with IP addressing, I wanted to send this > > to make sure what I have is correct or if I am really > > wrong on this one. > > Thanks in advance for any feedback or corrections!! > > > > This is a new network- > > Current IP Address=65.85.105.0 > > Mask=255.255.255.0 > > > > I need a total of 5 subnets. > > > > What I did > > Took 65.85.105.0, 255.255.255.128 to subnet into 2 > > networks, > > This gave me > > Subnet 1= 65.85.105.0, hosts 1-126, broadcast 127 > > Subnet 2=65.85.105.128, hosts 129-254, broadcast 255 > > > > Took 65.85,105.128 255.255.255.192 to subnet into 4 > > subnets > > This gave me > > Subnet 1=65.85.105.0. hosts 1-62, broadcast 63 > > Subnet 2=65.85.105.64, hosts 54-126, broadcast 127 > > Subnet 3=65.85.105.128, hosts 129-190, broadcast 190 > > Subnet 4=65.85.105.192, hosts 193.254, broadcast 255 > > > > So this would give me to use on the network > > 1=65.85.105.0 255.255.255.128 (17 mask?) > > 2=65.85.105.0 255.255.255.192 (18 mask?) > > 3=65.85.105.64 255.255.255.192 > > 4=65.85.105.128 255.255.255.192 > > 5=65.85.105.192 255.255.255.192 > > > > > > Did I do this correctly? This is based on using subnet > > zero. > > > > I am using a public class A but for security reasons I > > did change the actual real address. > > > > Thanks again for everyones feedback. > > > > > > __________________________________________________ > > Do You Yahoo!? > > Check out Yahoo! Shopping and Yahoo! Auctions for all of > > your unique holiday gifts! Buy at http://shopping.yahoo.com > > or bid at http://auctions.yahoo.com > [EMAIL PROTECTED] [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29169&t=29160 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
