Thanks to you and the others who replied. I should have remembered the math
-----Original Message----- From: Ben Scott [mailto:[email protected]] Sent: Friday, May 25, 2012 6:06 PM To: NT System Admin Issues Subject: Re: subnetting question On Fri, May 25, 2012 at 4:57 PM, Kim Longenbaugh <[email protected]> wrote: > However, when I tried to use this subnet, with a /22 for 1024 addresses, my > router doesn't like it, and when creating a DHCP scope, it tries to make a > superscope. > > 172.16.26.0/22 The address 172.16.26.0 is not on a /22 boundary. IP addresses are a 32 bit field. The /22 means the first 22 bits are the network portion. That leaves 10 bits for the node portion. Network boundaries for /22's have to "line up" with that. 172.16.26.0 is in the middle of a /22 network. The computer does not use dotted quads. That's a fiction created for human convenience. The computer sees a single 32-bit field. So where you see 172.16.26.0, the computer sees 10101100000100000001101000000000 (binary). See: http://www.mail-archive.com/[email protected]/msg107418.html -- Ben ~ 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
