Re: How to Renew DHCP Lease
Re: How to Renew DHCP Lease
- Subject: Re: How to Renew DHCP Lease
- From: Andrew Oliver <email@hidden>
- Date: Mon, 18 Apr 2005 23:57:28 -0700
On 4/18/05 10:31 PM, "Sander Tekelenburg" <email@hidden> wrote:
> At 17:35 -0700 UTC, on 2005/04/18, Andrew Oliver wrote:
>
>> On 4/18/05 11:36 AM, "Sander Tekelenburg" <email@hidden> wrote:
>>
>>> Now how about an easy way to recognise which interface is which? en0 seems
>>> to
>>> refer to the Ethernetcard (in machines that have only one). But on my
>>> PowerBook ifconfig -l gets me lo0, gif0, stf0, en0, en1 and fw0.
>>
>> lo0 = loopback
>> gif0 = VPN
>> stf0 = SixToFour = IPv6 tunneling protocol
>> en0 = built-in ethernet*
>> en1 = AirPort*
>> fw0 = FireWire
>
> Thanks. That's very useful. Raises lots more questions though :)
>
> I wonder how you found out about this. Tral and error? Is this documented
> somewhere?
In the case of the non-obvious options, man is your friend:
man gif
man stf
>What logic decides what points to what? How sure can we be that
> this will always be the case? What if someone uses an external USB wireless
> card, for instance? And what about BlueTooth? And why is there only one
> FireWire interface listed while this PowerBook has 2 (FW 400 and 800)? Can
> the answers to these questions be retrieved scriptually? :)
In the case of fw0, I believe that only one FireWire network interface is
supported - at least, I've never seen an fw1, even on systems with
additional FireWire cards. In any case, if you don't have an additional card
the chances are you only have a single FireWire bus, anyway, even if you
have multiple ports on that bus (they're wired together internally).
For BlueTooth, the only implementation I've seen has used PPP, so it appears
as ppp0.
This all leads to the question, though, of why your script cares...? :)
Andrew
:)
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