Re: ipcalc is peculiar

[Denis Hennessy <dhennessy network365 com>]

Putting a '0' in front of a number is a way of forcing it to be 
interpreted as octal. 017 is a valid octal number, corresponding to the 
decimal value 15. However, 019 is not a valid number since you can't 
have '9' in an octal number.

/dh

John wrote:

> As I understand it, the four segments of a human'comprehendable IP address are 
> decimal number. Not binary, not hexadecimal or octal, decimal.
> [spam debian spam]$ ipcalc --network 172.19.0.1/8
> NETWORK=172.0.0.0
> [spam debian spam]$ ipcalc --network 172.019.0.1/8
> ipcalc: bad ip address: 172.019.0.1
> [spam debian spam]$ ipcalc --network 172.17.0.1/8
> NETWORK=172.0.0.0
> [spam debian spam]$ ipcalc --network 172.017.0.1/8
> NETWORK=172.0.0.0
> [spam debian spam]$
>
>
> I believe, but haven't tested recently, that ifconfig also has this 
> affliction.
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