Pascal Hambourg escreveu:
Petr Pisar a écrit :
No. Loopback interface is just another dummy interface to be able to
assign node scope adresses from 127.0.0.0/8 block. The reason for
loopback is somobedy wants to have (node scoped) IP socket on machine
with
no real interfaces. It's just a historical relict because IP address
needs an interface in Linux.
I disagree. The loopback interface is very different from a dummy
interface. A dummy interface is just a black hole, it cannot do what
the loopback interface does. The loopback interface loops the traffic
back to the host and the kernel knows about it, this is what makes it
unique.
E.g. I know about people running IPv6 networks where each router has
globally routable addresses on loopaback interface, real ethernet
interfaces between routers have only link scope addresses and a
dynamic routing protocol (e.g, OSPF) is used to solve routing via
network. And of course it works.
So what ? You can do the same with IPv4 and it will work too, at least
on Linux.
This thread has gone faaar beyond what's supposed to be this mailing
list purpose in my opinion. Seem it's time to accept the fact that
loopback interface in linux is NOT a normal interface and, thus, cannot
be used for things 'normal' interfaces are used. It's time to accept, as
well, that routers, as well as all other non-linux OSs, can have another
approach on their loopback interfaces.
--
Atenciosamente / Sincerily,
Leonardo Rodrigues
Solutti Tecnologia
http://www.solutti.com.br
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