And lets not forget of doing a config backup before changing things, just in case something changes "on its own" and the network stops working.
----- Original Message ----- From: Micheal Espinola Jr To: NT System Admin Issues Sent: Tuesday, January 10, 2012 6:40 PM Subject: Re: Expaning Subnet again Without a proper understanding of the fundamentals, you could very easily make part of, if not all of your network unusable. A subnet calculator is a handy little tool, but you really should have a good grasp of the underlying concepts before taking on a challenge of [re]subnetting your network. A prerequisite to IP Addressing and Subnetting is understanding Binary and Decimal numbers. And I can tell you from an experience, if you are re-configuring switch or router, you assuredly want to do it from the command line and have full-control of what you are doing. There are web interfaces out there that will take additional liberties with settings based on what you choose in the "wizard" interface. -- Espi On Tue, Jan 10, 2012 at 11:23 AM, Don Ely <[email protected]> wrote: " No I'm fighting with my switches to change to /22, looks like my Dell switches I have to connect the cable and do it from the CLI command line, can't edit the IP in the GUI! " That's for a very good reason that most networking experts would understand without even attempting... On Tue, Jan 10, 2012 at 9:24 AM, Stefan Jafs <[email protected]> wrote: No I did not but i got the idea, i used the "Advanced Subnet Calculator" that shows me all my IP's. No I'm fighting with my switches to change to /22, looks like my Dell switches I have to connect the cable and do it from the CLI command line, can't edit the IP in the GUI! Stefan On Tue, Jan 10, 2012 at 11:36 AM, Micheal Espinola Jr <[email protected]> wrote: Are you guessing, or did you try writing it out as explained to you? -- Espi On Tue, Jan 10, 2012 at 7:37 AM, Stefan Jafs <[email protected]> wrote: So for me *.255 are usable exept 3.255, correct? Stefan On Mon, Jan 9, 2012 at 11:00 PM, Ben Scott <[email protected]> wrote: On Mon, Jan 9, 2012 at 7:32 PM, Heaton, Joseph@DFG <[email protected]> wrote: >>> .255 is broadcast >> >> Not always. > > Very true, if we go and break up a class C, that is absolutely true. But, > seeing as he's going the other way, and making the subnet bigger, not smaller... ".255" is still not always the broadcast address. For example, in a /23, there will be two addresses where the dotted-decimal ends in ".255". One will be the broadcast address, and the other will just be a regular host. -- 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 -- Stefan Jafs ~ 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 -- Stefan Jafs ~ 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 ~ 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
