Cisco Networking Academy TCS - Mountain Sky School Project

 

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 IP Addressing for Mountain Sky School  |  Static IP Addresses  |  Dynamic IP addresses (DHCP)
 


DYNAMIC IP ADDRESSES (DHCP OBTAINED) FOR MOUNTAIN SKY SCHOOL

  - Dynamic IP addresses will be used for all the rooms requiring connection to Mountain Sky's LAN this meaning all curriculum computers. These IP addresses will be obtained dynamically from Mountain Sky's DHCP server with the IP address: 192.168.188.2 subnet mask: 255.255.252.0 (/22)
  - DHCP server has been specifically placed on the same VLAN3 as the curriculum computers that it services
  - For Mountain Sky's dynamic IP addressing a class B private network 192.168.0.0 is used, subnetted , so that 62 maximum usable subnets are created. From these 62 subnets only 46 will be used as we have 46 rooms that require connections.
  - So for 62 subnets we will use 6 bits for subnet portion of the address, and 2 bits for hosts portion:
      - 6 bits for subnet
      - 2 bits for hosts
      - basic network address: 192.168.0.0
      - subnet mask: 255.255.252.0 (/22)
      - subnets created: 192.168.4.0, 192.168.8.0 ... 192.168.248.0 - 62 subnets
      - subnets used: 192.168.4.0, 192.168.8.0 ... 192.168.184.0 - 46 subnets
      - one more subnet will be used for router ethernet interface address for VLAN3 and DHCP server address, also located in VLAN3 - subnet 192.168.188.0

  - Detailed dynamic addressing scheme for every building:
      - For BUILDING A WEST:

Room

Subnet

Broadcast

IPs used

1001 - VLAN3

192.168.4.0

192.168.7.255

192.168.4.1 - 24

1002 - VLAN4

192.168.8.0

192.168.11.255

192.168.8.1 - 24

1003 - VLAN5

192.168.12.0

192.168.15.255

192.168.12.1 - 24

1004 - VLAN6

192.168.16.0

192.168.19.255

192.168.16.1 - 24

1005 - VLAN7

192.168.20.0

192.168.23.255

192.168.20.1 - 24

1006 - VLAN8

192.168.24.0

192.168.27.255

192.168.24.1 - 24

1007 - VLAN9

192.168.28.0

192.168.31.255

192.168.28.1 - 24

1008 - VLAN10

192.168.32.0

192.168.35.255

192.168.32.1 - 24

1009 - VLAN11

192.168.36.0

192.168.39.255

192.168.36.1 - 24

1011 - VLAN12

192.168.40.0

192.168.43.255

192.168.40.1 - 24

1012 - VLAN13

192.168.44.0

192.168.47.255

192.168.44.1 - 24

1013 - VLAN14

192.168.48.0

192.168.51.255

192.168.48.1 - 24

1014 - VLAN15

192.168.52.0

192.168.55.255

192.168.52.1 - 24

1015 - VLAN16

192.168.56.0

192.168.59.255

192.168.56.1 - 24

1016 - VLAN17

192.168.60.0

192.168.63.255

192.168.60.1 - 24

1017 - VLAN18

192.168.64.0

192.168.67.255

192.168.64.1 - 24

1018 - VLAN19

192.168.68.0

192.168.71.255

192.168.68.1 - 24

1019 - VLAN20

192.168.72.0

192.168.75.255

192.168.72.1 - 24

1020 - VLAN21

192.168.76.0

192.168.79.255

192.168.76.1 - 24

1021 - VLAN22

192.168.80.0

192.168.83.255

192.168.80.1 - 24

1022 - VLAN23

192.168.84.0

192.168.87.255

192.168.84.1 - 24

1023 - VLAN24

192.168.88.0

192.168.91.255

192.168.88.1 - 24

A1 - VLAN25

192.168.92.0

192.168.95.255

192.168.92.1 - 24

A2 - VLAN26

192.168.96.0

192.168.99.255

192.168.96.1 - 24

      - For BUILDING A EAST:

Room

Network

Broadcast

IPs used

1100 - VLAN27

192.168.100.0

192.168.103.255

192.168.100.1 - 24

1101 - VLAN28

192.168.104.0

192.168.107.255

192.168.104.1 - 24

1102 - VLAN29

192.168.108.0

192.168.111.255

192.168.108.1 - 24

1103 - VLAN30

192.168.112.0

192.168.115.255

192.168.112.1 - 24

1104 - VLAN31

192.168.116.0

192.168.119.255

192.168.116.1 - 24

1105 - VLAN32

192.168.120.0

192.168.123.255

192.168.120.1 - 24

1106 - VLAN33

192.168.124.0

192.168.127.255

192.168.124.1 - 24

1107 - VLAN34

192.168.128.0

192.168.131.255

192.168.128.1 - 24

1108 - VLAN35

192.168.132.0

192.168.135.255

192.168.132.1 - 24

1109 - VLAN36

192.168.136.0

192.168.139.255

192.168.136.1 - 24

1110 - VLAN37

192.168.140.0

192.168.143.255

192.168.140.1 - 24

      - For MULTIPURPOSE BUILDING AND PORTABLE CLASSROOMS:

Room

Network

Broadcast

IPs used

1200 - VLAN38

192.168.144.0

192.168.147.255

192.168.144.1 - 24

1202 - VLAN39

192.168.148.0

192.168.151.255

192.168.148.1 - 24

1203 - VLAN40

192.168.152.0

192.168.155.255

192.168.152.1 - 24

1204 - VLAN41

192.168.156.0

192.168.159.255

192.168.156.1 - 24

1205 - VLAN42

192.168.160.0

192.168.163.255

192.168.160.1 - 24

P1 - VLAN43

192.168.164.0

192.168.167.255

192.168.164.1 - 24

P2 - VLAN44

192.168.168.0

192.168.171.255

192.168.168.1 - 24

P3 - VLAN45

192.168.172.0

192.168.175.255

192.168.172.1 - 24

P4 - VLAN46

192.168.176.0

192.168.179.255

192.168.176.1 - 24

P5 - VLAN47

192.168.180.0

192.168.183.255

192.168.180.1 - 24

P6 - VLAN48

192.168.184.0

192.168.187.255

192.168.184.1 - 24

  - Subnetting and VLANs for each room are used to avoid problems like broadcast storms to affect all hosts on network, while DHCP is used to avoid problems like one curriculum computer's accidental change of IP address of affecting some other computer in another room
  - We have created more VLANs on switches and on the router each subnet is assigned using sub-interfaces on the Ethernet2 interface.

 

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