Hot Downloads

Welcome, Guest
Username: Password: Remember me

TOPIC: VLSM

VLSM 11 years 5 months ago #8888

  • urban30
  • urban30's Avatar
  • Offline
  • New Member
  • Posts: 1
  • Karma: 0
please could you tell me how i would vlsm 192.168.1.0 for 1)60 hosts 2)12 hosts 3)12hosts 4)28host.I have looked at the examples which you have given however i still do not get vlsm please could you guys help me many thanks :D
The administrator has disabled public write access.

Re: VLSM 11 years 5 months ago #8897

  • stefke
  • stefke's Avatar
  • Offline
  • Frequent Member
  • Posts: 36
  • Karma: 0
Hmm.. one of the key thing to VLMS is using none classfull subnetmasks..so based on your IP given I don't have any idea what your mask is.

For the purpose of this exercise lets presume that the mask is /24

Given:

192.168.1.0/24 --> You have 32-24=8 bits to play with

You need :

a) 60 hosts --> You need at least 6 bits (2^6=64-2=62 hosts) so you are left with 8-6= 2 bits for your subnets ---> you can create 2^2=4 subnets ==>

Subnet 1: 192.168.1.0/26
Subnet 2: 192.168.1.64/26
Subnet 3: 192.168.1.128/26
Subnet 4: 192.168.1.192/26



b) 12 hosts --> You need at least 4 bits (2^16=16-2=14 hosts) so you are left with 8-4= 4 bits for your subnets ---> you can create 2^4=16 subnets ==>

Subnet 1: 192.168.1.0/28
Subnet 2: 192.168.1.16/28
Subnet 3: 192.168.1.32/28
Subnet 4: 192.168.1.48/28
etc.. (keep adding 16 hosts in the 4th octet)


This can be done for every other nulber of hosts or subnets you need.

Hope you got the hang of it.

PS: You should google for 3COM IP subnetting document. I is a verry well explained document about subnetting and VLMS.

Greetings,

Stefan
The administrator has disabled public write access.
Time to create page: 0.072 seconds

CCENT/CCNA

Cisco Routers

  • SSL WebVPN
  • Securing Routers
  • Policy Based Routing
  • Router on-a-Stick

VPN Security

  • Understand DMVPN
  • GRE/IPSec Configuration
  • Site-to-Site IPSec VPN
  • IPSec Modes

Cisco Help

  • VPN Client Windows 8
  • VPN Client Windows 7
  • CCP Display Problem
  • Cisco Support App.

Windows 2012

  • New Features
  • Licensing
  • Hyper-V / VDI
  • Install Hyper-V

Linux

  • File Permissions
  • Webmin
  • Groups - Users
  • Samba Setup