On 2017-03-19 03:16, James Knott wrote:
It is possible to have multiple IP addresses on one NIC, by using alias addresses. However, as you say, there's no isolation that would block something like Wireshark. Typically VLANs are used on the LAN side, not the WAN. The only time I've seen VLANs on the WAN side is when one carrier is using another carriers fibre, to deliver a connection to a customer. In that situation, it's possible to have double VLANs on the fibre.
My ISP uses a configuration I don't understand yet, not documented. I get the typical 192* for home, but there is also a 10* network that it is using for the VoIp transparent phone, and I think it is external. Ie, the thing accesses 10.* hosts on the outside. And there is another vlan for the TV, I don't remember on which range. -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" (Minas Tirith))