John,

I think you might be conflating two different types of virtual
interfaces.  The eth0:n notation is for a virtual interface that works
at the IP layer, and shares the link layer, including MAC address, of
the parent interface.  Like this...

https://linuxconfig.org/configuring-virtual-network-interfaces-in-linux

Then there's the eth0.n notation (note the "." rather than the ":") for
a macvlan interface that works at the link layer, and can have a
separate MAC address (and VLAN) from the parent interface.  This shows
an example of each...

https://unix.stackexchange.com/questions/21841/make-some-virtual-mac-address

And this gives all the gory details of various types of virtual
interfaces for various VM hosting scenarios...

https://developers.redhat.com/blog/2018/10/22/introduction-to-linux-interfaces-for-virtual-networking

(I learned some new concepts and lots of new terminology from this last
one.)

In any case, Linux does indeed provide a way (or more) to support
multiple MAC addresses on one physical Ethernet interface, so setting
this up for multiple dynamic IP addresses from Shaw should be doable.

Gilbert

On 2021-12-01 9:22 a.m., John Lange wrote:
> Not sure I understood the question but yes you can have as many IPs as
> you want on the same nic.
>
> It's been a while since I have done it but you just add virtual nics and
> they look like this:
>
> Eth0:0
> Eth0:1
> Eth0:2
> Etc.
>
> Each one has its own Mac and can operate independently on the network.
> They can all be static IPs or dhcp.
>
> They can even be on different vlans.
>
> John

--
Gilbert E. Detillieux           E-mail: <gedetil@cs.umanitoba.ca>
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University of Manitoba          Phone:  (204)474-8161
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