Get-SubnetSize

NAME Get-SubnetSize



SYNOPSIS

Returns the possible number of hosts that a subnet can contain.





SYNTAX

Get-SubnetSize [-CIDR] <String> [[-IncludeSubnetIDAndBroadcastAddress]] [<CommonParameters>]



Get-SubnetSize [-SubnetMask] <String> [[-IncludeSubnetIDAndBroadcastAddress]] [<CommonParameters>]





DESCRIPTION

This function returns the possible number of hosts that the subnet can contain, by default it excludes the Subnet

ID and Broadcast addresses.



Shout out to

http://blog.markhatton.co.uk/2011/03/15 ... hostnames/

and https://social.msdn.microsoft.com/Forum ... gular-expr

ession-for-subnet-mask-2552552550-for-example?forum=regexp

for regex validation patterns!



Found the calculation logic online too, when I refind the links will include in shoutout.





PARAMETERS

-CIDR <String>

Subnet in CIDR format



Required? true

Position? 1

Default value

Accept pipeline input? true (ByValue)

Accept wildcard characters? false



-SubnetMask <String>

Subnet Mask



Required? true

Position? 1

Default value

Accept pipeline input? false

Accept wildcard characters? false



-IncludeSubnetIDAndBroadcastAddress [<SwitchParameter>]

Include subnet id and broadcast address



Required? false

Position? 2

Default value False

Accept pipeline input? false

Accept wildcard characters? false



<CommonParameters>

This cmdlet supports the common parameters: Verbose, Debug,

ErrorAction, ErrorVariable, WarningAction, WarningVariable,

OutBuffer, PipelineVariable, and OutVariable. For more information, see

about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).



INPUTS

Can accept strings of CIDR format from pipeline.





OUTPUTS

[Long] size of the subnet.





-------------------------- EXAMPLE 1 --------------------------



PS C:\\>Get-SubnetSize -CIDR 192.168.1.0/24



Returns the size of the subnet CIDR 192.168.1.0/24









-------------------------- EXAMPLE 2 --------------------------



PS C:\\>Get-SubnetSize -SubnetMask 255.255.0.0



Returns the size of the subnet with mask 255.255.0.0









-------------------------- EXAMPLE 3 --------------------------



PS C:\\>Get-SubnetSize -SubnetMask 255.0.0.0 -IncludeSubnetIDAndBroadcastAddress



Returns the size of the subnet with mask 255.0.0.0, including the id and broadcase











RELATED LINKS

https://github.com/poshsecurity/Posh-SubnetTools

Github for project

https://poshsecurity.com

Posh Security Website