On 2022-04-20 09:19, Kevin Fries wrote:
> Always remember, the network interface from the OS side and the
> network interface from the hardware side are two completely different
> concepts.  Other than the fact that they are generally matched one to
> one, they really have nothing to do with one another.
>
> A hardware interface (i.e. on a NIC) is physical, and you have as many
> as you have.  No way to manufacture more without installing more
> hardware.
>
> A OS network interface is a software construct.  ETH0 (using the old
> vernacular) generally maps to the first hardware interface, and
> provides a hook for software to use… most notably the network stack.
> While it is not done out of the box, there is no restriction to say
> that two of these constructs can not map to the same back end
> construct.  So yes, you can have ETH0.1 (again, using the old
> vernacular)
>
> VMWare and other similar virtual machine managers can take advantage of
> this.
>
> The second point you need to get straight in your head is that a fixed
> IP address is never a construct of the box, but of the Domain Naming
> Service (DNS) on the network.  It is NAMED that assigns the IP
> address.  For an interface (software in this case as the hardware’s
> address is actually the MAC ADDRESS) to have an address, it asks the
> DHCP server for it.  If the DHCP has been told, always assign this
> address to this requester, the address is a fixed, reserved, or
> dedicated IP depending on who is speaking to you.  They all mean the
> Same thing.
>
> So, yes, the number of NICs on a box does not limit the number of
> network interfaces the OS provides, and yes, each of those interfaces
> can have a dynamic or dedicated IP address.
>
> HTH
> Kevin
>
> Sent from my iPad
>
>> On Apr 20, 2022, at 9:51 AM, Keith Smith via PLUG-discuss
>> <plug-discuss@lists.phxlinux.org> wrote:
>>
>> 
>> Hi,
>> I'm wondering how VPS servers are configured.  I have a VPS with a
>> dedicated IP.  I assume I share a box that has a number of virtual
>> machines and I assume each VPS has a dedicated IP.
>>
>> This is a hardware question.  I assume the box has at least 2 network
>> cards.  So lets say the server has 20 VPS on it and each has a
>> dedicated IP. Does the box need a NIC for each IP or does the box have
>> NIC cards that can service/route multiple IPs?
>>
>> I have a Dell consumer grade mini tower computer with a single NIC
>> which is built into the motherboard.  I assume that NIC can only
>> service one IP address, is that correct or can I install
>> virtualization software on this computer and use the NIC for multiple
>> IP's?
>>
>> Did I just open a can of worms?
>>
>> Thanks in advance for your wisdom.
>> ---------------------------------------------------
>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
>> To subscribe, unsubscribe, or to change your mail settings:
>> https://lists.phxlinux.org/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
To subscribe, unsubscribe, or to change your mail settings:
https://lists.phxlinux.org/mailman/listinfo/plug-discuss