>>>>> On Thu, 22 Mar 2001 16:02:10 -0500, 
>>>>> "David E. Cross" <[EMAIL PROTECTED]> said:

> Why is routing done via the ::1 and 127.0.0.1 network addresses?  I notice
> for "normal" interfaces it is bound directly to "link#2" and such. 

It's just a characteristic (or ristriction if you want to say that) of
BSD's IPv4 routing on point-to-point interfaces.  I don't know the
deep rationale.

> I realize I don't really know what I am talking about here, but, it
> seems that binding it to the link is more efficient than having it go
> through the loopback interface.

I'm not sure what you mean "efficient" here.  But using addresses to
install a route to the loopback interface does not decrease the output
performance.

> Also, it will work in cases where the 
> loopback is not defined (don't ask... just don't ask)

That's not true.  In the BSD's routing architecture, if  you want to
install a route of a particular address family to an interface, you
need at least one interface address of the address family on the
interface.  The address need not to be the well-defined "loopback
address", though.

                                        JINMEI, Tatuya
                                        Communication Platform Lab.
                                        Corporate R&D Center, Toshiba Corp.
                                        [EMAIL PROTECTED]

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