Feature Request

[Tim Nowaczyk]

Any plans to add support for /31 (RFC-3021) and /32 subnets? Many ISPs take a chunk of addresses and carve it into individual /32s for router loopback addresses, then turn another chunk into /31s for router-to-router PtP links.

Thanks,
Tim Nowaczyk

[Seth McCauley]

I realize this was posted quote a while ago, but here it is if you still need this info
(or for anyone else needing to know this):

You can change the subnet size limit to 31 by editing the following file:
./inc/subnets.php

On line 633, change $max = 30 to $max = 31.

This does appear to work, although I am not certain if the /30 limitation is hard set anywhere else.

Here is an example:

...
function subnet_mask_dropdown($name, $version, $min = 1)
{
    $ret = '<select name="' . $name . '">';
    if ($version == 4) {
        //$min = 1;
        $max = 31;
    } else {
        //$min = 1;
        $max = 127;
    }
...