Thank you for visiting the Rackspace Community
The The Community is live! Post new content or topics so our teams can assist.

Please contact your support team if you have a question or need assistance for any Rackspace products, services, or articles.

IP's and Subnet's

Hi All,

I wanted to give a basic introduction to IP's and subnet's.

 

An example of IP’s and subnets:

Example of an IP - 192.168.10.245

This is how an IP address is formed in a binary perspective. There are 4 octets in an IP address totalling one number each. That number that is totalled is one of the number between the dots and it will equal between 0 - 255.

 For example:

 An octet is 8 bits of either 1 or 0 that’s why it’s called an octet. An octet made up of 10011010 actually means the following:

 

128

64

32

16

8

4

2

1

1

0

0

1

1

0

1

0

 

If you add the totals of all the 1 columns together you get:

128+16+8+2 = 154

So if this was the first octet of 4 in an IP address it would read:

154.x.x.x

 

How subnet masks work

Anything with a 1 on the subnet mask means the corresponding digit in the IP address is fixed and cant change. Anything with a 0 can be altered on the IP address to give you different IP's. Keep in mind every device usually needs a different IP address.

 

IP address

11000000.10101000.00000101.10000010

192.168.5.130

Subnet mask

11111111.11111111.11111111.00000000

255.255.255.0

 

IP address

11000000.10101000.00000101.10000010

192.168.5.130

Subnet mask

11111111.11111111.11111111.11000000

255.255.255.192

 

Often subnets can be referred to as a / and then a number after an IP address.

 The first subnet example above could be shown as:

 192.168.5.130 /24

 which means the last octet is all 0’s in the subnet mask.

This is a brief intro to help understand IP's and subnet masks so please ask if you have any questions.

Thanks,
Eamon

Parents
No Data
Reply
  • Users might probably have heard the term  subnetting but don’t know what it is all about. It is separating a large system into smaller systems. The word means subnetwork, that means a large network separated into smaller networks named subnets. There is an IP address that is quantified to classify the subnet, and another one is utilized to recognize a broadcast address inside the subnet. For those users who don’t know how to subnet their networks, here we have a solution for you.

    1- As first step find the option of Advanced Subnet Calculator, open it and shift to the Classful Subnet Calculator tab.
    2- Add the IP address of your network to break down into further nets.
    3- You can also alter the number of hosts you want per subnet and tap the option of generate subnets.
    4- At this stage you will be given the number of subnets that you picked.
    5- Below the option of Host Range, you will see the first and last valid host address. Here you will see the broadcast address for that precise subnet.
    6- Now beneath the subnet will see the network ID for that subnet.
    7- In case you want to copy the addresses of the subnets then press Copy Subnets. In case of importing the addresses to an Excel or any other file, you can go to the File and tap the Export icon.

Children
No Data