ipcalc
Package: WA2L/edrc 1.5.57
Section: General Commands (1)
Updated: 21 March 2013
Index
Return to Main Contents
NAME
ipcalc - IP Calculator
SYNOPSIS
edrc/bin/ipcalc
[
--help
]
ipcalc
[
options
]
address[[
/
]netmask
] [
netmask
]
ipcalc
address1-address2
AVAILABILITY
WA2L/edrc
DESCRIPTION
ipcalc
takes an IP address and netmask and calculates the
resulting broadcast, network, Cisco wildcard mask, and host
range. By giving a second netmask, you can design subnets
and supernets. It is also intended to be a teaching tool
and presents the subnetting results as easy-to-understand
binary values.
Enter your netmask(s) in CIDR notation (
/25
) or dotted decimals (
255.255.255.0
). Inverse netmasks are recognized. If you omit the netmask
ipcalc
uses the default netmask for the class of your network.
Look at the space between the bits of the addresses:
The bits before it are the network part of the address, the
bits after it are the host part. You can see two simple facts:
In a network address all host bits are zero, in a broadcast
address they are all set.
The class of your network is determined by its first bits.
If your network is a private internet according to RFC 1918
this is remarked. When displaying subnets the new bits in the
network part of the netmask are marked in a different color
The wildcard is the inverse netmask as used for access control
lists in Cisco routers.
Do you want to split your network into subnets? Enter the
address and netmask of your original network and play with the
second netmask until the result matches your needs.
OPTIONS
- --help
-
usage message.
- address
-
IP-address.
- netmask
-
netmask.
- -n | --nocolor
-
do not display ANSI color codes.
- -b | --nobinary
-
suppress the bitwise output.
- -c | --class
-
just print bit-count-mask of given address.
- -h | --html
-
display results as HTML (not finished in this version).
- -v | --version
-
print Version.
- -s n1 n2 n3
-
split into networks of size n1, n2, n3.
- --split n1 n2 n3
-
split into networks of size n1, n2, n3.
- -r | --range
-
de-aggregate address range.
ENVIRONMENT
-
EXIT STATUS
- 0
-
always
FILES
-
EXAMPLES
- 1) common usage
-
ipcalc 192.168.0.1/24
ipcalc 192.168.0.1/255.255.128.0
ipcalc 192.168.0.1 255.255.128.0 255.255.192.0
ipcalc 192.168.0.1 0.0.63.255
- 2) de-aggregate address range
-
ipcalc 192.168.0.23 - 192.168.1.200
- 3) split networks into subnets
-
ipcalc 192.168.6.20 -s 200
ipcalc 192.168.6.20 -s 200 200 200
SEE ALSO
edrcintro(1),
http://www.ietf.org/rfc/rfc1517.txt,
http://www.cisco.com/univercd/cc/td/doc/product/software/ssr83/ptc_r/22057.htm,
https://wiki.archlinux.de/title/Ipcalc
NOTES
The main part of this manpage has been extracted from the documentation
of the
ipcalc
command as provided on the web site
http://jodies.de/ipcalc
of the author of the command, Krischan Jodies, and was modified to
fit into WA2L/edrc package. Some of the examples come from the
web page
https://wiki.archlinux.de/title/Ipcalc
which provides an excellent german description of the
ipcalc
command.
BUGS
-
AUTHOR
ipcalc was developed by Krischan Jodies <ipcalc-200808@jodies.de> and
has been integrated into WA2L/edrc by Christian Walther. Send suggestions
and bug reports related to WA2L/edrc to wa2l@users.sourceforge.net .
COPYRIGHT
Copyright © 2013
Christian Walther
This is free software; see
edrc/doc/COPYING
for copying conditions. There is ABSOLUTELY NO WARRANTY; not
even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This document was created by man2html
using the manual pages.
Time: 16:53:15 GMT, August 28, 2024