ipcalc does not split network sequentially
nippyin opened this issue · comments
If I want to split network with required hosts it should show subnets in a sequence. As shown in the screenshot it jumps and skips few network bits.
After creating /24 subnet for 10.32.89.0/24 the next subnet it is showing is 10.32.95.96/28.
it should have shown 10.32.90.0/28 and so on ...
To achieve the wanted behaviour we would have to sort the requested networks by size before running the splits:
--- ipcalc 2021-11-03 18:00:11.000000000 +0100
+++ x 2022-12-22 00:07:08.000000000 +0100
@@ -637,6 +637,7 @@
my @mask;
my $needed_addresses = 0;
my $needed_size;
+ @sizes = sort { $b <=> $a } @sizes;
foreach (@sizes) {
$needed_size = round2powerof2($_+2);
push @network , $needed_size .":".$i++;
I am unsure if we should do that though, because the networks are then not longer returned in the same order of sizes as they were requested. And the result is completely the same. Which is probably not very obvious, but if you look at the example you gave, the 10.32.90.0/28 that you expected is eventually among the results.
Objective of the following script is to get unused subnets so that they can be allocated if required.
array contains already allocated subnets
allocated_subnets=(18 20 20 24 24 24 24 24 27 24 28 28 28 24 24 22 24 24 24 24 24 24 24 26 24 24 22 22 21 27 27 27 21 21 21)
for _ in "${allocated_subnets[@]}"; do
# whatmask is the utility which will convert the subnet mask to number of usable hosts
whatmask $_ | grep Usable | awk -F' ' '{print $6}' | sed -e 's/,//g' >> sub_host
done
# ipcalc slice the network into required number of hosts and awk will only show Unused subnets
#ipcalc '10.32.0.0/16' -s $(cat sub_host) | awk '/Unused/{found=1} found'
ipcalc '10.32.0.0/16' -s $(cat sub_host)
# Remove the temp file created for hosts count.
rm sub_host
Actually 10.32.90.0/28 is not amount the results. Here is the complete output
Address: 10.32.0.0 00001010.00100000. 00000000.00000000
Netmask: 255.255.0.0 = 16 11111111.11111111. 00000000.00000000
Wildcard: 0.0.255.255 00000000.00000000. 11111111.11111111
=>
Network: 10.32.0.0/16 00001010.00100000. 00000000.00000000
HostMin: 10.32.0.1 00001010.00100000. 00000000.00000001
HostMax: 10.32.255.254 00001010.00100000. 11111111.11111110
Broadcast: 10.32.255.255 00001010.00100000. 11111111.11111111
Hosts/Net: 65534 Class A, Private Internet
-
Requested size: 16382 hosts
Netmask: 255.255.192.0 = 18 11111111.11111111.11 000000.00000000
Network: 10.32.0.0/18 00001010.00100000.00 000000.00000000
HostMin: 10.32.0.1 00001010.00100000.00 000000.00000001
HostMax: 10.32.63.254 00001010.00100000.00 111111.11111110
Broadcast: 10.32.63.255 00001010.00100000.00 111111.11111111
Hosts/Net: 16382 Class A, Private Internet -
Requested size: 4094 hosts
Netmask: 255.255.240.0 = 20 11111111.11111111.1111 0000.00000000
Network: 10.32.64.0/20 00001010.00100000.0100 0000.00000000
HostMin: 10.32.64.1 00001010.00100000.0100 0000.00000001
HostMax: 10.32.79.254 00001010.00100000.0100 1111.11111110
Broadcast: 10.32.79.255 00001010.00100000.0100 1111.11111111
Hosts/Net: 4094 Class A, Private Internet -
Requested size: 4094 hosts
After slicing following subnet, next subnet should have been sliced from
10.32.96.0/24
Netmask: 255.255.240.0 = 20 11111111.11111111.1111 0000.00000000
Network: 10.32.80.0/20 00001010.00100000.0101 0000.00000000
HostMin: 10.32.80.1 00001010.00100000.0101 0000.00000001
HostMax: 10.32.95.254 00001010.00100000.0101 1111.11111110
Broadcast: 10.32.95.255 00001010.00100000.0101 1111.11111111
Hosts/Net: 4094 Class A, Private Internet
-
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.140.0/24 00001010.00100000.10001100. 00000000
HostMin: 10.32.140.1 00001010.00100000.10001100. 00000001
HostMax: 10.32.140.254 00001010.00100000.10001100. 11111110
Broadcast: 10.32.140.255 00001010.00100000.10001100. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.141.0/24 00001010.00100000.10001101. 00000000
HostMin: 10.32.141.1 00001010.00100000.10001101. 00000001
HostMax: 10.32.141.254 00001010.00100000.10001101. 11111110
Broadcast: 10.32.141.255 00001010.00100000.10001101. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.142.0/24 00001010.00100000.10001110. 00000000
HostMin: 10.32.142.1 00001010.00100000.10001110. 00000001
HostMax: 10.32.142.254 00001010.00100000.10001110. 11111110
Broadcast: 10.32.142.255 00001010.00100000.10001110. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.143.0/24 00001010.00100000.10001111. 00000000
HostMin: 10.32.143.1 00001010.00100000.10001111. 00000001
HostMax: 10.32.143.254 00001010.00100000.10001111. 11111110
Broadcast: 10.32.143.255 00001010.00100000.10001111. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.144.0/24 00001010.00100000.10010000. 00000000
HostMin: 10.32.144.1 00001010.00100000.10010000. 00000001
HostMax: 10.32.144.254 00001010.00100000.10010000. 11111110
Broadcast: 10.32.144.255 00001010.00100000.10010000. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 30 hosts
Netmask: 255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Network: 10.32.157.64/27 00001010.00100000.10011101.010 00000
HostMin: 10.32.157.65 00001010.00100000.10011101.010 00001
HostMax: 10.32.157.94 00001010.00100000.10011101.010 11110
Broadcast: 10.32.157.95 00001010.00100000.10011101.010 11111
Hosts/Net: 30 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.145.0/24 00001010.00100000.10010001. 00000000
HostMin: 10.32.145.1 00001010.00100000.10010001. 00000001
HostMax: 10.32.145.254 00001010.00100000.10010001. 11111110
Broadcast: 10.32.145.255 00001010.00100000.10010001. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 14 hosts
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Network: 10.32.157.192/28 00001010.00100000.10011101.1100 0000
HostMin: 10.32.157.193 00001010.00100000.10011101.1100 0001
HostMax: 10.32.157.206 00001010.00100000.10011101.1100 1110
Broadcast: 10.32.157.207 00001010.00100000.10011101.1100 1111
Hosts/Net: 14 Class A, Private Internet -
Requested size: 14 hosts
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Network: 10.32.157.208/28 00001010.00100000.10011101.1101 0000
HostMin: 10.32.157.209 00001010.00100000.10011101.1101 0001
HostMax: 10.32.157.222 00001010.00100000.10011101.1101 1110
Broadcast: 10.32.157.223 00001010.00100000.10011101.1101 1111
Hosts/Net: 14 Class A, Private Internet -
Requested size: 14 hosts
Netmask: 255.255.255.240 = 28 11111111.11111111.11111111.1111 0000
Network: 10.32.157.224/28 00001010.00100000.10011101.1110 0000
HostMin: 10.32.157.225 00001010.00100000.10011101.1110 0001
HostMax: 10.32.157.238 00001010.00100000.10011101.1110 1110
Broadcast: 10.32.157.239 00001010.00100000.10011101.1110 1111
Hosts/Net: 14 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.146.0/24 00001010.00100000.10010010. 00000000
HostMin: 10.32.146.1 00001010.00100000.10010010. 00000001
HostMax: 10.32.146.254 00001010.00100000.10010010. 11111110
Broadcast: 10.32.146.255 00001010.00100000.10010010. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.147.0/24 00001010.00100000.10010011. 00000000
HostMin: 10.32.147.1 00001010.00100000.10010011. 00000001
HostMax: 10.32.147.254 00001010.00100000.10010011. 11111110
Broadcast: 10.32.147.255 00001010.00100000.10010011. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 1022 hosts
Netmask: 255.255.252.0 = 22 11111111.11111111.111111 00.00000000
Network: 10.32.128.0/22 00001010.00100000.100000 00.00000000
HostMin: 10.32.128.1 00001010.00100000.100000 00.00000001
HostMax: 10.32.131.254 00001010.00100000.100000 11.11111110
Broadcast: 10.32.131.255 00001010.00100000.100000 11.11111111
Hosts/Net: 1022 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.148.0/24 00001010.00100000.10010100. 00000000
HostMin: 10.32.148.1 00001010.00100000.10010100. 00000001
HostMax: 10.32.148.254 00001010.00100000.10010100. 11111110
Broadcast: 10.32.148.255 00001010.00100000.10010100. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.149.0/24 00001010.00100000.10010101. 00000000
HostMin: 10.32.149.1 00001010.00100000.10010101. 00000001
HostMax: 10.32.149.254 00001010.00100000.10010101. 11111110
Broadcast: 10.32.149.255 00001010.00100000.10010101. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.150.0/24 00001010.00100000.10010110. 00000000
HostMin: 10.32.150.1 00001010.00100000.10010110. 00000001
HostMax: 10.32.150.254 00001010.00100000.10010110. 11111110
Broadcast: 10.32.150.255 00001010.00100000.10010110. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.151.0/24 00001010.00100000.10010111. 00000000
HostMin: 10.32.151.1 00001010.00100000.10010111. 00000001
HostMax: 10.32.151.254 00001010.00100000.10010111. 11111110
Broadcast: 10.32.151.255 00001010.00100000.10010111. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.152.0/24 00001010.00100000.10011000. 00000000
HostMin: 10.32.152.1 00001010.00100000.10011000. 00000001
HostMax: 10.32.152.254 00001010.00100000.10011000. 11111110
Broadcast: 10.32.152.255 00001010.00100000.10011000. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.153.0/24 00001010.00100000.10011001. 00000000
HostMin: 10.32.153.1 00001010.00100000.10011001. 00000001
HostMax: 10.32.153.254 00001010.00100000.10011001. 11111110
Broadcast: 10.32.153.255 00001010.00100000.10011001. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.154.0/24 00001010.00100000.10011010. 00000000
HostMin: 10.32.154.1 00001010.00100000.10011010. 00000001
HostMax: 10.32.154.254 00001010.00100000.10011010. 11111110
Broadcast: 10.32.154.255 00001010.00100000.10011010. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 62 hosts
Netmask: 255.255.255.192 = 26 11111111.11111111.11111111.11 000000
Network: 10.32.157.0/26 00001010.00100000.10011101.00 000000
HostMin: 10.32.157.1 00001010.00100000.10011101.00 000001
HostMax: 10.32.157.62 00001010.00100000.10011101.00 111110
Broadcast: 10.32.157.63 00001010.00100000.10011101.00 111111
Hosts/Net: 62 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.155.0/24 00001010.00100000.10011011. 00000000
HostMin: 10.32.155.1 00001010.00100000.10011011. 00000001
HostMax: 10.32.155.254 00001010.00100000.10011011. 11111110
Broadcast: 10.32.155.255 00001010.00100000.10011011. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 254 hosts
Netmask: 255.255.255.0 = 24 11111111.11111111.11111111. 00000000
Network: 10.32.156.0/24 00001010.00100000.10011100. 00000000
HostMin: 10.32.156.1 00001010.00100000.10011100. 00000001
HostMax: 10.32.156.254 00001010.00100000.10011100. 11111110
Broadcast: 10.32.156.255 00001010.00100000.10011100. 11111111
Hosts/Net: 254 Class A, Private Internet -
Requested size: 1022 hosts
Netmask: 255.255.252.0 = 22 11111111.11111111.111111 00.00000000
Network: 10.32.132.0/22 00001010.00100000.100001 00.00000000
HostMin: 10.32.132.1 00001010.00100000.100001 00.00000001
HostMax: 10.32.135.254 00001010.00100000.100001 11.11111110
Broadcast: 10.32.135.255 00001010.00100000.100001 11.11111111
Hosts/Net: 1022 Class A, Private Internet -
Requested size: 1022 hosts
Netmask: 255.255.252.0 = 22 11111111.11111111.111111 00.00000000
Network: 10.32.136.0/22 00001010.00100000.100010 00.00000000
HostMin: 10.32.136.1 00001010.00100000.100010 00.00000001
HostMax: 10.32.139.254 00001010.00100000.100010 11.11111110
Broadcast: 10.32.139.255 00001010.00100000.100010 11.11111111
Hosts/Net: 1022 Class A, Private Internet -
Requested size: 2046 hosts
Netmask: 255.255.248.0 = 21 11111111.11111111.11111 000.00000000
Network: 10.32.96.0/21 00001010.00100000.01100 000.00000000
HostMin: 10.32.96.1 00001010.00100000.01100 000.00000001
HostMax: 10.32.103.254 00001010.00100000.01100 111.11111110
Broadcast: 10.32.103.255 00001010.00100000.01100 111.11111111
Hosts/Net: 2046 Class A, Private Internet -
Requested size: 30 hosts
Netmask: 255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Network: 10.32.157.96/27 00001010.00100000.10011101.011 00000
HostMin: 10.32.157.97 00001010.00100000.10011101.011 00001
HostMax: 10.32.157.126 00001010.00100000.10011101.011 11110
Broadcast: 10.32.157.127 00001010.00100000.10011101.011 11111
Hosts/Net: 30 Class A, Private Internet -
Requested size: 30 hosts
Netmask: 255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Network: 10.32.157.128/27 00001010.00100000.10011101.100 00000
HostMin: 10.32.157.129 00001010.00100000.10011101.100 00001
HostMax: 10.32.157.158 00001010.00100000.10011101.100 11110
Broadcast: 10.32.157.159 00001010.00100000.10011101.100 11111
Hosts/Net: 30 Class A, Private Internet -
Requested size: 30 hosts
Netmask: 255.255.255.224 = 27 11111111.11111111.11111111.111 00000
Network: 10.32.157.160/27 00001010.00100000.10011101.101 00000
HostMin: 10.32.157.161 00001010.00100000.10011101.101 00001
HostMax: 10.32.157.190 00001010.00100000.10011101.101 11110
Broadcast: 10.32.157.191 00001010.00100000.10011101.101 11111
Hosts/Net: 30 Class A, Private Internet -
Requested size: 2046 hosts
Netmask: 255.255.248.0 = 21 11111111.11111111.11111 000.00000000
Network: 10.32.104.0/21 00001010.00100000.01101 000.00000000
HostMin: 10.32.104.1 00001010.00100000.01101 000.00000001
HostMax: 10.32.111.254 00001010.00100000.01101 111.11111110
Broadcast: 10.32.111.255 00001010.00100000.01101 111.11111111
Hosts/Net: 2046 Class A, Private Internet -
Requested size: 2046 hosts
Netmask: 255.255.248.0 = 21 11111111.11111111.11111 000.00000000
Network: 10.32.112.0/21 00001010.00100000.01110 000.00000000
HostMin: 10.32.112.1 00001010.00100000.01110 000.00000001
HostMax: 10.32.119.254 00001010.00100000.01110 111.11111110
Broadcast: 10.32.119.255 00001010.00100000.01110 111.11111111
Hosts/Net: 2046 Class A, Private Internet -
Requested size: 2046 hosts
Netmask: 255.255.248.0 = 21 11111111.11111111.11111 000.00000000
Network: 10.32.120.0/21 00001010.00100000.01111 000.00000000
HostMin: 10.32.120.1 00001010.00100000.01111 000.00000001
HostMax: 10.32.127.254 00001010.00100000.01111 111.11111110
Broadcast: 10.32.127.255 00001010.00100000.01111 111.11111111
Hosts/Net: 2046 Class A, Private Internet
Needed size: 40432 addresses.
Used network: 10.32.0.0/16
Unused:
10.32.157.240/28
10.32.158.0/23
10.32.160.0/19
10.32.192.0/18