static ip question

Guru

Mar 09, 2020

> I am setting it up with my ps4 and wondering if I set a static ip
> address, which is under the lan settings, [...]

Terminology: A "static" address is configured on the device itself.
What you configure on the (DHCP server on the) router is a reserved
dynamic address, not a static address.

> [...] will it apply to non lan wifi connections as well?

What is the actual problem which you are trying to solve?

A network "connection" does not have an IP address; a network
interface does. Apparently, your "my ps4" has two network interfaces,
one wired (Ethernet), and one wireless.

Address Reservation reserves a particular IP address to be associated
with a particular MAC address. Normally, every network interface in
your LAN has its own (locally) unique MAC address. Reserving an IP
address for one network interface (specified by its MAC address) does
not automatically reserve that IP address for any other network
interface (which should have its own, different MAC address), even if
both those interfaces are in the same box ("my ps4").

You can try it, but I'd guess that the router won't let you reserve
the same LAN IP address for two different MAC addresses. If that's what
you're trying to do.

Note that, strictly speaking, your "my ps4" does not have an IP
address. A network interface in your "my ps4" can have an IP address.
If there are two network interfaces in your "my ps4", then each one can
have its own IP address. (I'd bet that each one has its own MAC
address.) Trying to give the same IP address to both network interfaces
in your "my ps4" is more likely to cause trouble than not.

https://en.wikipedia.org/wiki/MAC_address

microchip8
Master
Mar 10, 2020
Reserving an address for a specific device works both for LAN and WiFi devices. If you add a reserved address for a device, it'll always get the same IP from the DHCP no matter if connected with a cable or wirelessly

Just make sure you use the correct MAC address. If a device has both wired and wireless capabilities, it'll have 2 different MAC addresses, one for the wired and one for the WiFi
- antinode
  Guru
  Mar 10, 2020
  > [...] if you knew anything about the interface of the router, maybe
  > you would understand what i am talking about a bit better.
  
     If you would identify the actual problem which you are trying to
  solve, _then_ I might understand what you're trying to do. But, I'm
  willing to stay ignorant, if that's what you'd prefer.
  
  > Reserving an address for a specific device works both for LAN and WiFi
  > devices. [...]
  
     Because, as explained above, they're _all_ "LAN devices".
  
  > [...] If you add a reserved address for a device, it'll always get the
  > same IP from the DHCP no matter if connected with a cable or
  > wirelessly
  
     Have you actually run this experiment in the real world, or only in
  your head? (I have. See below.)
  
     Define "device". Does my MacBook ("13-inch, Aluminum, Late 2008",
  "OS X El Capitan", "Version 10.11.6") qualify as a "device"?
  
     My MacBook has an IP address reserved (for its wireless interface) of
  "10.0.0.29". You seem to be claiming that if I disable its wireless
  interface, and connect its Ethernet interface to the same router, then
  its Ethernet interface will also get that same IP address. Or did I
  misunderstand?
  
     Surprise!!! It doesn't. For its Ethernet interface, it gets an
  address from the DHCP pool ("10.0.0.227"). Around here, that's _not_
  "the same IP [address] from the DHCP [server] no matter if connected
  with a cable or wirelessly".
  
     As explained above (repeatedly), "a device" does _not_ have an IP
  address (or a MAC address). A _network_interface_ has these properties.
  
     If "a device" has only one network interface, then you can usually
  ignore the distinction between a device and its (one and only) network
  interface, but when "a device" has multiple network interfaces, then you
  ignore that distinction at your peril.
  
  I'd explain it all again, but if the first or second time didn't do
  the job, then I might be wasting my time with more attempts.
antinode
Guru
Mar 10, 2020
> i reserved an ip address under the lan settings for my ps4 based on
> it's mac address.

   Not exactly. See 'Note that, strictly speaking, your "my ps4" does
not have an IP address. [...]', above.

> the issue is that this was under lan settings on the router. that is
> why i am not sure if it will apply to the wireless connection i am using
> with it.

   "LAN" = "Local-Area Network". "Local-Area" and "wired" are spelled
differently for a reason. A device with a wireless connection to your
router is as much a part of your LAN as a device with a wired
connection.` You do Address Reservation for all your devices in the same
place.

> because it was under lan settings...is the thing.

   No, that's not the thing.

> also i know i can set a static ip on the ps4 interface.

   I'll try again...

> Terminology: A "static" address is configured on the device itself.
> What you configure on the (DHCP server on the) router is a reserved
> dynamic address, not a static address.

   Do you mean a static address, or a reserved dynamic address? And for
_which_ "the ps4 interface"?

> [...] Apparently, your "my ps4" has two network interfaces, one wired
> (Ethernet), and one wireless.

   Still true, isn't it?

> my question is if that is necessary or if the dhcp i set up under lan
> settings will have the same effect.

   If you reserved an IP address for the Ethernet interface of the PS4,
then you reserved an IP address for the _Ethernet_ interface of the PS4.

   The wireless interface of the PS4 is a different interface, with a
different MAC address (I'd guess), so a reservation for one of these
interfaces is not a reservation for both interfaces.

> [...] i am thinking the dhcp settings alone might work for, it in
> terms of setting up port forwarding

   What, exactly, are these "the dhcp settings"?

>    What is the actual problem which you are trying to solve?

   Still a mystery.

> [...] setting up port forwarding

   Are you trying to set up port forwarding so that it works no matter
which network interface you use on the PS4?

> [...] Trying to give the same IP address to both network interfaces
> in your "my ps4" is more likely to cause trouble than not.

   Still my opinion.
orcmarksman
Aspirant
Mar 10, 2020
do you even own a netgear router or one of their gaming routers? if you knew anything about the interface of the router, maybe you would understand what i am talking about a bit better.

sheesh
- labatt
  Mentor
  Mar 10, 2020
  orcmarksman wrote:
  do you even own a netgear router or one of their gaming routers? if you knew anything about the interface of the router, maybe you would understand what i am talking about a bit better.
  
  sheesh
  He loves to make it sound like he knows everything, but rest of us are big dummies.
  Bottom line on the question is this. When you make a DHCP reservation based on client MAC the DHCP server could care less what the client connection is, wired or wireless. The DHCP server sees the request from the client including the MAC. DHCP server checks and says hay I have an IP address I need to give to that client. No real mystery about what connection.
  - antinode
    Guru
    Mar 10, 2020
    > He loves to make it sound like he knows everything, [...]
    
       I frequently admit to my ignorance on various subjects, but, in this
    case, I actually demonstrated my claim. Read it again?
    
    > Bottom line on the question is this. [...]
    
       That might be _your_ "Bottom line". It's not mine.
    
    > [...] When you make a DHCP reservation based on client MAC the DHCP
    > server could care less what the client connection is, wired or wireless.
    > [...]
    
       I'll assume that you meant "could _not_ care less", but, as
    previously explained (repeatedly), the "client MAC [address]" is not a
    "client [device] MAC [address]"; it's a "client _interface_ MAC
    address", and, as previously stated, I would not expect the wired and
    wireless interfaces in any particular client device to have the same MAC
    address.
    
       In my MacBook example, its Ethernet MAC address is
    "00:23:32:c6:6d:be", and its wireless MAC address is
    "00:23:6c:87:9c:83". See the difference? And that's why my address
    reservation for its wireless interface has no direct effect on the
    address granted to its Ethernet interface.
    
    > [...] No real mystery about what connection.
    
       If you say so. But some of us know-it-all types prefer to run the
    experiment before making such pronouncements. Because "believing" and
    "knowing" are spelled differently for a reason.

Forum Discussion