Re: Jessie networking with multiple IPs (IPv and IPv6), single physical NIC

[Georgi Naplatanov <gosho@oles.biz>]

On 07/26/2017 09:22 PM, Sven Hartge wrote:
> Tom Browder <tom.browder@gmail.com> wrote:
> 
>> The proposed /etc/network/interfaces file:
>> # begin =============================
>> iface eth0 inet static
>>         address 142.54.186.2
>>         netmask 255.255.255.248
>>         gateway 142.54.186.1
>>         dns-nameservers 192.187.107.16 69.30.209.16
> 
>>         # add new IPv4 devices
>>         up   addr add 142.54.186.3/29 dev $IFACE label $IFACE:0
>>         down addr del 142.54.186.3/29 dev $IFACE label $IFACE:0
> 
> You don't need those up/down parts, you can add additional blocks for
> eth0:
> 
> auto eth0
> iface eth0 inet static
>         address 142.54.186.2
>         netmask 255.255.255.248
>         gateway 142.54.186.1
>         dns-nameservers 192.187.107.16 69.30.209.16
>

I think that every additional interface should have suffix in its name -
eth0:1, et0:2, etc.

Example:

 iface eth0:1 inet static
         address 142.54.186.3
         netmask 255.255.255.248

 iface eth0:2 inet static
         address 142.54.186.4
         netmask 255.255.255.248


By the way Linux kernel supports virtual interfaces as well. I used this
feature when my local ISP forced me to use only one IPv4 address per MAC
address.

Kind regards
Georgi

> iface eth0 inet static
>         address 142.54.186.3
>         netmask 255.255.255.248
> 
> iface eth0 inet static
>         address 142.54.186.4
>         netmask 255.255.255.248
> [...]
> 
> 
>> iface eth0 inet6 static
>>         address 2604:4300:a:95::2
>>         netmask ffff:ffff:ffff:ffff::
>>         gateway 2604:4300:a:95::1
>>         dns-nameservers 192.187.107.16 69.30.209.16
> 
> And the same here as well.
> 
> Grüße,
> Sven.
>