Fred, check out the archives for Howard's piece on the difference between 'Rocket Science' and 'BGP' when at NASA.
Best regards, Dom Stocqueler SysDom Technologies Visit our website - www.sysdom.org -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reimer, Fred Sent: 09 September 2003 22:03 To: [EMAIL PROTECTED] Subject: RE: Please Help - CIDR - How the bits work [7:75050] I guess my expectation and Cisco's, or at least their current expectations as listed on their web site, don't match then. By my definition a beginner should know about CIDR, EIGRP, and OSPF. It's not like they are inherently difficult to understand. People tend to make it sound like rocket science or voodoo magic. It's just a routing protocol folks. Fred Reimer - CCNA Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 NOTICE; This email contains confidential or proprietary information which may be legally privileged. It is intended only for the named recipient(s). If an addressing or transmission error has misdirected the email, please notify the author by replying to this message. If you are not the named recipient, you are not authorized to use, disclose, distribute, copy, print or rely on this email, and should immediately delete it from your computer. -----Original Message----- From: "Chuck Whose Road is Ever Shorter" [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 3:56 PM To: [EMAIL PROTECTED] Subject: Re: Please Help - CIDR - How the bits work [7:75050] ""Reimer, Fred"" wrote in message news:[EMAIL PROTECTED] > May be I had advanced access to the new NA material then ;-) In my > view, a > NA should be able to handle basic RIP, OSPF, EIGRP in a small to > medium sized network. That would certainly include CIDR. A NP, IMO, > would be for > advanced RIP, OSPF, EIGRP, and basic BGP, like for configuring a > mid-large sized network for connection to the Internet including > minimal BGP. IE, IMO, is for ISP engineers that have to deal with > extensive IS-IS, BGP using > all options, etc, and large to huge (global) networks. > > May be I'm just expecting too much, but if you don't understand CIDR > you shouldn't be allowed anywhere near a router, let alone be > responsible for configuring them. with all due respect, I disagree. CCNA is promoted by Cisco as being someone capable of designing and configuring a small network. http://www.cisco.com/en/US/learning/le3/le2/le0/le9/learning_certificati on_t ype_home.html "The CCNA certification (Cisco Certified Network Associate) indicates a foundation in and apprentice knowledge of networking. CCNA certified professionals can install, configure, and operate LAN, WAN, and dial access services for small networks (100 nodes or fewer), including but not limited to use of these protocols: IP, IGRP, Serial, Frame Relay, IP RIP, VLANs, RIP, Ethernet, Access Lists." my experience has been that small nets have less if any need for CIDR knowledge or expertise. Cisco has over the past couple of years been slowly upping the ante, and I wish Cisco would get clear as to what skill sets are appropriate at what certification level. Cisco tends to be all over the map on this, and has been the netire time I have been playing at certification. But in general, I believe the idea is that CCxA is beginner, CCxP is intermediate, and CCIE is high level. as with all things certification related, YMMV. I've known CCNA's who manage large networks, and I've known CCIE's whose knowledge of certain specific areas was less than expert. As can be expected, depending on experience, job, place of employment, years in the field, etc. Chuck > > Fred Reimer - CCNA > > > Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 > Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 > > > NOTICE; This email contains confidential or proprietary information > which may be legally privileged. It is intended only for the named > recipient(s). If an addressing or transmission error has misdirected > the email, please notify the author by replying to this message. If > you are not the named recipient, you are not authorized to use, > disclose, distribute, copy, print > or rely on this email, and should immediately delete it from your computer. > > > -----Original Message----- > From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED] > Sent: Tuesday, September 09, 2003 12:33 PM > To: [EMAIL PROTECTED] > Subject: RE: Please Help - CIDR - How the bits work [7:75050] > > Reimer, Fred wrote: > > > > No offense, but this is CCNA material. > > Do they still teach classful for CCNA, though? Perhaps the only thing that's > hard for him is that 192.168.24.0 has a mask of 255.255.255.0 in a classful > system. Moving the prefix over to the left of that classful boundary > isn't something they teach for CCNA yet. (They will soon. The new > Networking Academy books teach it from the start now.) > > Priscilla > > > If you are going for > > your CCNP, then > > you should already have your CCNA and know the answer. But > > anyway... > > > > If you need a network with 400 hosts, the smallest subnet would have > > a /23 mask. So take the first part of your given network and assign > > it to that: > > > > 192.168.24.0/23 (192.168.24.0-192.168.25.255) > > > > Then you need one with 200 hosts. Well, that could fit within a /24 > > subnet, so assign the next available to that: > > > > 192.168.26.0/24 (192.168.26.0-192.168.26.255) > > > > Now you only have 192.168.27.0/24 left from the original > > 192.168.24.0/23 (which covered 192.168.24.0-192.168.27.255). You > > need two 50's, so that > > should fit within /26 subnets each. Assign them: > > > > 192.168.27.0/26 (192.168.27.0-192.168.27.63) 192.168.27.64/26 > > (192.168.27.64-192.168.27.191) > > > > Finally, you need three subnets that can have two hosts each, which > > would fit within /30 subnets. So assign: > > > > 192.168.27.192/30 > > 192.168.27.196/30 > > 192.168.27.200/30 > > > > > > Fred Reimer - CCNA > > > > > > Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA 30338 > > Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 > > > > > > NOTICE; This email contains confidential or proprietary > > information which > > may be legally privileged. It is intended only for the named > > recipient(s). > > If an addressing or transmission error has misdirected the > > email, please > > notify the author by replying to this message. If you are not > > the named > > recipient, you are not authorized to use, disclose, distribute, > > copy, print > > or rely on this email, and should immediately delete it from > > your computer. > > > > > > -----Original Message----- > > From: Steven Aiello [mailto:[EMAIL PROTECTED] > > Sent: Tuesday, September 09, 2003 8:02 AM > > To: [EMAIL PROTECTED] > > Subject: Please Help - CIDR - How the bits work [7:75050] > > > > I just started my routing class for my CCNP. We are covering > > CIDR. The > > book is VEEEEEERY vague on how the bit patterns break down and > > are used. > > > > > > This was a problem posed in one of my CCNP labs > > > > I have network number > > > > 192.168.24.0 / 22 > > > > from this I need > > networks with > > > > 400 hosts > > 200 hosts > > 50 hosts > > 50 hosts > > 2 hosts (for serial int - no ip un-numbered allowed ) > > 2 hosts > > 2 hosts > > > > Also no NATing > > > > Thanks all I really could use the help > > > > Steve > > **Please support GroupStudy by purchasing from the GroupStudy > > Store: > > http://shop.groupstudy.com > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > **Please support GroupStudy by purchasing from the GroupStudy Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > **Please support GroupStudy by purchasing from the GroupStudy Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=75126&t=75050 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
