Multiple IPv4 addresses per NIC (w/o aliases, VLANs, etc.)

[Richard Kolb II]

I'm under the impression that ifconfig is deprecated on linux, so this may
be why it's not supporting the full feature set..


Richard Kolb II

On Tue, Sep 18, 2018 at 10:24 AM, Derek Atkins <warlord at mit.edu> wrote:

> Kyle Smith <askreet at gmail.com> writes:
>
> > Totally legitimate feature/functionality. I never understood why ifconfig
> > doesn't seem to support the full feature set of the kernel, probably
> just to
> > maintain legacy compatibility. IIRC it dates back to at least 2.2 and
> predates
> > IPv6 being compiled into most distros.
> >
> > Having multi IP addresses on a single device is pretty critical to having
> > Linux act as a reasonably complex router, gateway, NAT gateway, etc.
>
> It really only needs multiple addresses on a single physical device.
> It doesn't really matter if they are the same logical device or if they
> are virtual.  I.e., it doesn't matter if it's eth0 or eth0:0.
>
> This is from personal experience.
>
> -derek
>
> --
>        Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
>        Member, MIT Student Information Processing Board  (SIPB)
>        URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
>        warlord at MIT.EDU                        PGP key available
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