What is this new certification you have... the CCIE(Write)? Does that mean you write code for the IOS?
""Sureshhomepage .com"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > thanks for the excellant notes! > > cheers! > suresh CNE,MCSE+I,CLS,SCSA,CCNA,CCNP,MCNS,CCIE(Write) > http://www.sureshhomepage.com > > > >From: "John Neiberger" > >Reply-To: "John Neiberger" > >To: [EMAIL PROTECTED] > >Subject: How to Summarize Network Addresses [7:29149] > >Date: Thu, 13 Dec 2001 17:40:08 -0500 > > > >Someone just asked me off-list how to summarize a certain range of > >addresses and I thought it might be helpful to post my reply to the > >list. It seems like everybody has their own shortcut to doing this, but > >this is how I learned how to do it. Once you learn it there are plenty > >of shortcuts. > > > > > > > >As far as summarization goes, to really understand what you're doing > >you need to think in binary. Write out those addresses in binary > >first: > > > >00001010.00000001.00000001.00000000 = 10.1.1.0/24 > >00001010.00000001.00000011.00000000 = 10.1.3.0/24 > >00001010.00000001.00001110.01000000 = 10.1.14.64/26 > > > >You can see that in binary they are all the same up to the 20th bit. > >If you slice the above table into two pieces at the 20th bit, on the > >left side you are left with: > > > >00001010.00000001.0000 > > > >This, translated back to decimal, is 10.1.0.0/20, which is your > >summarized address. However, this is an awful example. Those would be > >really bad addresses to try to summarize. A better example would be > >this: > > > >10.1.0.0/24 > >10.1.1.0/24 > >10.1.2.0/24 > >10.1.3.0/24 > > > >00001010.00000001.00000000.00000000 > >00001010.00000001.00000001.00000000 > >00001010.00000001.00000010.00000000 > >00001010.00000001.00000011.00000000 > > > >You can see that these are the same up to the 22nd bit. Slice the > >diagram into to pieces at the 22nd bit and on the left side you are left > >with: > > > >00001010.00000001.000000 > > > >which translates back to decimal as 10.1.0.0/22. Now you can see that > >a /22 precisely summarizes four /24s !! Cool, huh? > > > > > > > >Regards, > >John > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=30023&t=29149 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
