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How Big Should Your LAN Be SAMIT Video

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networkingnetworklancidrsamityoutube
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  • S
    scottalanmiller
    last edited by

    Youtube Video

    In the 1990s, we were all taught that networks should be no larger than a /24 or what used to be called a Class C network. But a lot has changed since then. How big should your LAN be today?

    E 1 Reply Last reply Reply Quote 4
    • S
      scottalanmiller
      last edited by

      The timing on this might seem like I recorded it because of some other threads that were asking about this, but it just took a while to get posted. This was actually recorded a week or two ago.

      1 Reply Last reply Reply Quote 1
      • E
        Emad R @scottalanmiller
        last edited by

        @scottalanmiller

        Hi,

        I always opt for /24 and if working with big company where 254 machines/servers/printers wont be suffice go with
        /16, however I never used /21 /22 or /23

        Perhaps i should have used them, but in a sense /16 worked and seems responsive enough, even though it is way bigger than the slots I need

        J S 2 Replies Last reply Reply Quote 0
        • J
          JaredBusch @Emad R
          last edited by

          @emad-r said in How Big Should Your LAN Be SAMIT Video:

          @scottalanmiller

          Hi,

          I always opt for /24 and if working with big company where 254 machines/servers/printers wont be suffice go with
          /16, however I never used /21 /22 or /23

          Perhaps i should have used them, but in a sense /16 worked and seems responsive enough, even though it is way bigger than the slots I need

          You should not use arbitrary CIDR sizes like that. As with everything, it should be designed to fit the business.

          D 1 Reply Last reply Reply Quote 4
          • S
            scottalanmiller @Emad R
            last edited by

            @emad-r said in How Big Should Your LAN Be SAMIT Video:

            @scottalanmiller

            Hi,

            I always opt for /24 and if working with big company where 254 machines/servers/printers wont be suffice go with
            /16, however I never used /21 /22 or /23

            Perhaps i should have used them, but in a sense /16 worked and seems responsive enough, even though it is way bigger than the slots I need

            It also makes it bigger than it is possible to use, encouraging problems and the bigger you make it, the more likely you are to experience problematic overlaps.

            1 Reply Last reply Reply Quote 0
            • D
              dafyre @JaredBusch
              last edited by

              @jaredbusch said in How Big Should Your LAN Be SAMIT Video:

              @emad-r said in How Big Should Your LAN Be SAMIT Video:

              @scottalanmiller

              Hi,

              I always opt for /24 and if working with big company where 254 machines/servers/printers wont be suffice go with
              /16, however I never used /21 /22 or /23

              Perhaps i should have used them, but in a sense /16 worked and seems responsive enough, even though it is way bigger than the slots I need

              You should not use arbitrary CIDR sizes like that. As with everything, it should be designed to fit the business.

              I wish I could upvote this a few more times. At my last job, they were using a /11 network! That gives something like 2million IP addresses per subnet, I think. This was in 2004, with a colllege of 1,000 people at most. I couldn't even use tools like Spiceworks because they would balk when I told them I wanted to scan 2 million IP addresses, lol.

              We fixed that later, of course.

              1 Reply Last reply Reply Quote 0
              • F
                FATeknollogee
                last edited by

                Isn't that what they say in Texas...the more bigger, the more better...(sarcasm emoji)

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