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Re: ifconfig network resolution (Re: pointers to material for using netbook's wireless as access point)




On Sun, Jun 11, 2017 at 4:57 PM, Joe <joe@xxxxxxxxxxxxxx> wrote:
> On Sat, 10 Jun 2017 10:57:47 +0900
> Joel Rees <joel.rees@xxxxxxxxx> wrote:
>
>> Experimenting from the command line, I find myself puzzled about the
>> arguments for ifconfig.
>>
>> Reading the manual, it would appear that the arguments for ifconfig
>> should be something like this:
>>
>>     ifconfig eth0 netmask 255.255.255.224 netmask 255.255.255.224
>> broadcast 10.19.23.223 10.19.23.94
>>
>> But the command returns with
>>
>> SIOCSIFNETMASK: Can't allocate this address.
>> SIOCSIFBRDADDR: Can't allocate this address.
>>
>> If I repeat the command, it gives no errors, but the netmask and
>> broadcast address end up full class A (255.0.0.0 and 10.255.255.255).
>>
>> Anyone have an idea what's happening?
>>
>
> Could you humour me for a moment, and try the exercise with one of the
> 192.168... networks, with the same sized subnet?
>
> I've seen this kind of behaviour a very long time ago, and I can't
> really believe it is still happening, but...

See the other sub-thread. But it does go to class C instead of the partial
class C when the device address comes at the end of the list.

--
Joel Rees

Trying to re-invent the entire industry all by myself:
http://defining-computers.blogspot.jp/