Announcement

Collapse
No announcement yet.

VLSM subnet

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • VLSM subnet

    Hi there, Could someone tell me whether this VLSM subnetting is correct or not? I did it by myself but not sure correct or not. Thanks so much.

    Question:

    VLSM for the folowing requirements.
    LAN1 - 100 hosts
    LAN2 - 8000 hosts
    LAN3 - 700 hosts
    LAN4 - 7000 hosts
    serials 2 subnets 4 hosts each

    IP address 155.5.0.0/16

    Answer:

    For LAN2 - 8000 hosts
    Sub-networks
    155.5.0.0/19
    155.5.32.0/19
    155.5.64.0/19
    155.5.96.0/19
    155.5.128.0/19
    155.5.160.0/19
    155.5.192.0/19
    155.5.224.0/19

    For 8000 hosts
    155.5.0.0/19(Network Address)
    155.5.0.1 to 155.5.31.254
    155.5.31.255(Broadcast Address)

    For LAN4 - 7000 hosts

    Sub-networks
    155.5.32.0/19
    155.5.64.0/19
    ....................

    For 7000 hosts
    155.5.32.0/19(Network Address)
    155.5.32.1 to 155.5.63.254
    155.5.63.255(Broadcast Address)

    For LAN3 - 700 hosts
    Sub-networks
    155.5.64.0/22
    155.5.68.0/22
    ....................

    For 700 hosts
    155.5.64.0/22(Network Address)
    155.5.64.1 to 155.5.67.254
    155.5.67.255(Broadcast Address)

    For LAN1 - 100 hosts
    Sub-networks
    155.5.68.0/25
    155.5.68.128/25
    .......................

    For 100 hosts
    155.5.68.0/25(Network Address)
    155.5.68.1 to 155.5.68.126
    155.5.68.127(Broadcast Address)

    For serial0 4 hosts
    Sub-networks
    155.5.68.128/30
    155.5.68.132/30
    .......................

    For 4 hosts
    155.5.68.128/30(Network Address)
    155.5.68.129 to 155.5.68.130
    155.5.68.131(Broadcast Address)

    For serial1 4 hosts
    Sub-networks
    155.5.68.132/30
    155.5.68.136/30
    .......................

    For 4 hosts
    155.5.68.132/30(Network Address)
    155.5.68.133 to 155.5.68.134
    155.5.68.135(Broadcast Address)

  • #2
    Re: VLSM subnet

    It's too late to calculate but have a look at this one
    http://www.vlsm-calc.net/
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

    Comment


    • #3
      Re: VLSM subnet

      Originally posted by Dumber View Post
      It's too late to calculate but have a look at this one
      http://www.vlsm-calc.net/
      Thanks for the calculator at least i can check my calculation right or wrong.

      Comment


      • #4
        Re: VLSM subnet

        Get yourself a copy of solarwinds.Its a great package for network trouble shooting and interrrogation and includes a number of Cisco tools aswell as a subnet calculators etc.

        Comment

        Working...
        X