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Duplicate IP Address
I just got this router yesterday and setup was easy. However, when I look at the Advanced tab I see duplicate IP addresses: The first is my Samsumg phone (checked the MAC address) and the second is ...
Okay...I didn't change the DHCP pool range but I did give my printer a static IP 0f .100. I have seven devices total and they all get assigned an IP below .010 so I should be good. Thanks for your help.
> [...] what I did was configure my printer manually to a different IP
> address. 192.168.1.10 rather than 192.168.1.5. So now the printer is 10,
> the phone 5 and all appears to be fine.
And it might remain fine, until you get a few more devices, and your
router grants the ".10" address to some other device which uses DHCP.
There was a reason for asking the following question (repeatedly):
> > [...] Are all the client devices configured to use DHCP?
>
> Still wondering.
If you assign a static IP address to a device like your (unspecified)
"my printer", but that address is still in the DHCP pool on the router,
then the router will be perfectly happy to grant that address to some
other device, causing the same problem again.
If, for some/any reason, you want a fixed IP address for your
(unspecified) "my printer", then you might have less trouble if you
configure it to use DHCP (probably its default mode), and then reserve
the desired (dynamic) address on the router.
Visit http://netgear.com/support , put in your model number, and look
for Documentation. Get the User Manual. Read. Look for "Address
Reservation".
If, for some/any reason, you insist on configuring your (unspecified)
"my printer" with a static IP address, then it should be an address
which is _not_ in the DHCP address pool. For example, on these routers,
the default DHCP pool range is typically ".2" - ".254". That is, the
whole usable address range, except for the router itself (".1"). If you
shrank that to, say, ".100" - ".254", the you could use the range ".2" -
".99" for static addresses, and there would be no chance of the DHCP
server in the router granting any of those non-pool addresses to any
DHCP client device. (Barring router firmware bugs, of course.)
For the how-to on changing the DHCP pool address range, look for "Use
Router as DHCP Server" in the User Manual.
That sounds like a good solution. I see whereas I can limit the DHCP range and will do that. I can just leave my printer .10 which is outside that range of addresses. I can't help but wonder, however, that the router gave two different devices the same IP. Here's something I may try for "fooling around" purposes. Change the DHCH router addresses to .100-.254 as you mentioned, change my printer back to DHCP, power everything down, turn the router back on then power my devices back on then see if they all have unique addresses. I would assume they all should...starting at .100. Before I do so, does this soound feasible.
> [...] I can't help but wonder, however, that the router gave two
> different devices the same IP. [...]The _router_ (strictly, the DHCP server in the router) should not
grant the same IP address to two different devices. But, if _you_
"manually" assign a static address to some device, then that device uses
that address, without bothering to ask the DHCP server about anything.
Then, in its ignorance, the DHCP server wouldn't hesitate in granting
that in-pool address to some other device.> [...] Here's something I may try [...]
If you configure the printer to use DHCP, then it should get its
(unique) IP address using DHCP, like all your other DCHP-client devices.
If you don't explictitly reserve a dynamic address for a device, then
that will come from the DHCP pool (whichever range you specify for
that).> [...] I would assume they all should...starting at .100. Before I do
> so, does this soound feasible.
Sure. What could go wrong?If you use Address Reservation to reserve a particular address for a
DCHP-client device, then that device should get that reserved address,
rather than some unpredictable address from the DHCP pool.If you do use Address Reservation, then my advice is to choose only
non-pool addresses for those reserved addresses. (Just the same as for
any static addresses.) In principle, the DHCP server should be smart
enough not to consider granting an in-pool reserved address to the wrong
device just because it's still (apparently) in the pool, but why trust
it? If your reserved addresses are all ex-pool, then the question
should never arise.Okay...I didn't change the DHCP pool range but I did give my printer a static IP 0f .100. I have seven devices total and they all get assigned an IP below .010 so I should be good. Thanks for your help.
> Okay...I didn't change the DHCP pool range [...]
> [...] so I should be good.
You now know how to do it right, so that the problem cannot recur,
and how to do it wrong, so that the problem is less likely to recur.
And you picked which of those? Yow.Possibly helpful: Web search for the following terms:
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