Date: Sat, 13 Mar 2004 13:06:04 -0800 From: Justin Walker <justin@mac.com> To: freebsd-net@freebsd.org Subject: Re: One IP used on more than one interface (gif0 and lo0) Message-ID: <3D08F840-7532-11D8-8D02-00306544D642@mac.com> In-Reply-To: <Pine.BSF.4.21.0403091008010.15852-100000@InterJet.elischer.org>
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On Tuesday, March 9, 2004, at 10:10 AM, Julian Elischer wrote:
>
>
> On Tue, 9 Mar 2004, Justin Walker wrote:
>
>>
>> On Tuesday, March 9, 2004, at 01:55 AM, Frrodo Baggins wrote:
>>
>>> Hi,
>>>
>>> What happens if we configure an alias on lo0:
>>>
>>> ifconfig lo0 alias 192.168.5.1 netmask 255.255.255.0
>>>
>>> and then use the same IP on gif0:
>>
>> What happens if you have the same address on two different houses on
>> the same street?
>
>
> that isn't the question..
> it's
> "why have different numbers on houses on differnt streets?"
>
> It is in fact common practice to number all your P2P links using teh
> address of one of your broadcast interfaces..
>
> this works well, saves you an address and you have a simpler routing
> table.
>
> Point to point links route using the REMOTE address and don't care
> about
> teh local address so this always works.
Thanks for pointing this out; I got caught in the "all the world's an
ethernet" trap, and overdid it.
Cheers,
Justin
--
Justin C. Walker, Curmudgeon-At-Large *
Institute for General Semantics | It's not whether you win or
lose...
| It's whether *I* win or lose.
*--------------------------------------*-------------------------------*
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