Orbi WiFi 7 RBE973
Reply

Re: Nighthawk CAX30S LAN Configuration

ecolucci
Tutor

Nighthawk CAX30S LAN Configuration

I have a Netgear Nighthawk CAX30S that I am beginning to configure.  In the Attached Devices section, I see a wired device that automatically was assigned an IP address of 192.168.1.2 before I even began to configure anything.  This address appears to be assigned as a static IP I assume by the router itself since I did not do it.  To what device does this address apply?

Message 1 of 16

Accepted Solutions
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

For what it’s worth, I worked out the source of my trouble: an addled brain…. A large part of my confusion is that my tablet and iPod are in fact using two MAC addresses thanks to a privacy feature called Private Wi-Fi Address, which either is turned on by default and went unnoticed by me, or I turned it on when I first got those two devices and then promptly forgot all about that feature. This means the Attached Devices list is correct, and my “need” for adding the “correct devices” as reserved addresses in the DHCP pool to “force” my router to recognize those devices never existed so I deleted them. My LAN configuration is clean now with everything working as it should--with the possible exception of my brain….

View solution in original post

Message 10 of 16

All Replies

Re: Nighthawk CAX30S LAN Configuration


@ecolucci wrote:

In the Attached Devices section, I see a wired device that automatically was assigned an IP address of 192.168.1.2 before I even began to configure anything.  This address appears to be assigned as a static IP I assume by the router itself since I did not do it.  To what device does this address apply?


What else is connected to the router? Your PC?

 

Why do you think it is a "static" IP address. The modem/router doesn't control those.

 

It does allow you to make an "Address Reservation" but that is something else.

 

It is down to the devices you connect to assign their own "fixed" IP addresses. Do you have anything set up like that?

 

Maybe what you see is a feature of the fact that the CAX30S is a cable modem/router.

 

While many questions about routers are generic and could be answered anywhere, some things need specialist knowledge.

You might get more help, and find earlier questions and answers specific to your device, in the appropriate section for your hardware. That's probably here:


Cable Modems & Gateways - NETGEAR Communities

You might like to search there for messages related to your problem.

I will ask the Netgear moderator to move your message.

In the meantime you could visit the support pages:

Support | NETGEAR

Feed in your model number and check the documentation for your hardware. Look at the label on the device for the model number.

Check for various troubleshooting tips.

You may have done this already. I can't tell from your message.

I mention it because Netgear stopped supplying printed manuals and CD versions some years ago and people sometimes miss the downloads.

 

 

 

Message 2 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

I will try to address your questions in sequence.  You write, "What else is connected to the router?"  Yes, my computer also was attached at the time, but it was assigned a different IP.
 
"Why do you think it is a "static" IP address."  Because there was nothing else attached initially.  All other devices either were off-network or offline (powered off) at the time.
 
"The modem/router doesn't control those....It is down to the devices you connect to assign their own "fixed" IP addresses."  I do know the difference between statically and dynamically assigned IPs.  Actually, the devices themselves (computer, smart phone, printer, etc.) do not assign their own IPs; this is something that generally is done manually by a human.  The fact that before I configured any such IPs on any of my devices an attached wired device with IP 192.168.1.2 appeared in the list made me "suspicious."
 
"Maybe what you see is a feature of the fact that the CAX30S is a cable modem/router."  This is my suspicion, but I am not certain since previous modem-routers were not configured in this manner.  After spending an hour or so searching various posts and threads, I could not locate anything specific to my situation so I started a new topic hoping someone might have the answer.  I did check Netgear technical support but was directed to this community, which is my reason for submitting my question(s) here first.
 
"Some things need specialist knowledge."  Yes, I think I might need to speak to a Netgear technical-support specialist.  The Netgear CAX manual refers to Ethernet link aggregation as using/requiring static IPs, but link aggregation is something else.  That is not what I am addressing, and link aggregation is turned off in my settings in any event.

It also is possible that the CAX30S/CAX30 does not support static IPs—unless aggregated—because I since have configured multiple devices with static IPs  and notice that the CAX30 assigned numerous dynamic IPs to various wireless devices that are the same as the IPs that I configured statically to some of my wired devices. That is, I now have certain wired and wireless devices using the same IPs on my network, which (obviously) should not happen.

Thank you for trying. I will attempt to locate a specialist at Netgear to call. There must be a way for me to assign static IPs to certain devices and have the CAX router recognize those static IPs so that the router does not assign those same IPs to other devices and create traffic conflicts.

Message 3 of 16

Re: Nighthawk CAX30S LAN Configuration


@ecolucci wrote:

There must be a way for me to assign static IPs to certain devices and have the CAX router recognize those static IPs so that the router does not assign those same IPs to other devices and create traffic conflicts.


If you assign what you call a "static" IP address to a device, then that IP address will show up in the router as an attached device. (It isn't an exclusive use of the "static" term, but that is often used for your WAN IP address, which is why Netgear uses that label when it talks about the settings from your ISP.)

 

Giving a device an IP address on your network does not make it invisible to the router. It will add it to your table of devices

 

I see this all the time for the NAS storage and printers on my network.

Message 4 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

I don’t think we are communicating. I am not sure what you are getting at when you refer to my use of the phrase static IP address. I am not using the phrase incorrectly if that is what you are suggesting. In any event, that is not my point.

 

My point is that I manually am configuring certain of my devices with static IP addresses; I do not want my router to dynamically assign IPs to those certain devices. However, my CAX30 modem-router is not automatically registering these devices as having static IP addresses and dynamically reassigns those same IP addresses to other devices on my network. This creates a conflict whereby multiple devices on my network simultaneously have the same IP address, which should not happen.

 

My understanding is that when a router is not able automatically to recognize a device having a static IP address, there usually (always in my 30-some-years experience) is a way to force the router to do so. Although I have used many pieces of Netgear equipment in the past including older routers, I am not as familiar with these newer models and their software. So as yet, it has not been evident to me where this is done in the online administrator software.

 

You wrote earlier, “It does allow you to make an "Address Reservation" but that is something else.” Actually after five phone calls and several hours with multiple Netgear technical-support specialists (I just got off the phone with them), it turns out that is precisely where I am to force my router into recognizing my assigned static IP addresses.

 

After I logged in, I was instructed to select the Advanced tab, then select Setup in the left navigation menu, and then select the LAN Setup submenu. Once on that page, there is a location near the bottom whereby I can add those devices under Address Reservation. Once added and saved, the router supposedly no longer dynamically will assign those specific IPs to any other of my devices.

 

I emphasized supposedly above because when I check a different section of the CAX30 router software (Advanced > Administration > Attached Devices) I still see two devices with duplicate IP addresses to the devices listed under Address Reservation. I know they are different devices because they have different MAC addresses. Meanwhile, those same two devices with the “correct” MAC addresses are not listed under Attached Devices. My other devices now listed under Address Reservation correctly appear under Attached Devices; only two do not.  So although this appears to be the correct solution to one problem, this solution does not appear to be working entirely as it should.

 

When I spoke to Netgear tech support, I queried whether this could be a bug in the firmware (I just installed a recently released update last night). I was told they don’t know the reason for this discrepancy but are escalating the problem among their support staff and will get back to me sometime during the next 24-48 hours. Hopefully, they will have a solution. If not, I probably will drop the matter since this already is taking more time to resolve than it should take. If only two/four devices on my LAN have potential traffic conflicts, I think I can live with that….

Message 5 of 16
FURRYe38
Guru

Re: Nighthawk CAX30S LAN Configuration

Be sure to understand that STATIC IP ADDRESSES are set ON devices themselves and reside OUTSITE of a host routers default DHCP IP address pool.


IP ADDRESS RESERVATIONS are set ON the host router and with in the host routers default DCHP IP address pool. 

 

This is standard networking practice for many a year.

 

Recommend setting the default DHCP IP address pool range to the following after applying and a factory reset: 192.168.#.100 to 192.168.#.200.
https://kb.netgear.com/24089/How-do-I-specify-the-pool-of-IP-addresses-assigned-by-my-Nighthawk-rout...

Then you have room on either side of the pool for STATIC configured devices. I've been using this for years on ANY router I put online. Even with my CAX30. 

Message 6 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

"STATIC IP ADDRESSES...reside OUTSITE of a host routers default DHCP IP address pool."   This is the way my router currently is configured although I did not have it set up this way originally.  I adjusted the DHCP pool after the fact, unplugged everything, and restarted the CAX30.  I thought that would have reset everything.  However as of this writing, the problem persists: two IP addresses for two devices (iPod Touch and iPad) are replicated in the Address Reservation list and in the Attached Devices list.

 

I asked myself if it is possible those two devices have two WiFi MAC addresses without my previously being aware of this possibility, but I checked both devices more than once and also checked my settings from my previous router's configuration, and I cannot see what I am missing--if anything.  Out of curiosity, you stated you have a CAX30.  What firmware are you on?  Mine is using Firmware Version V1.4.12.2.

Message 7 of 16

Re: Nighthawk CAX30S LAN Configuration


@ecolucci wrote:

I don’t think we are communicating. I am not sure what you are getting at when you refer to my use of the phrase static IP address. I am not using the phrase incorrectly if that is what you are suggesting.

 

I did not say that you were using the term incorrectly. I said that you used it in a way that might lead to confusion. (Another ambiguous term with several meanings is "Bridge mode".) Regular visitors to this place are more likely to recognise the term "fixed IP address".

 

Search - NETGEAR Communities – "fixed ip address"

 

This is really where the problem lies. The router should not reallocate those fixed IP addresses to something else.

 


However, my CAX30 modem-router is not automatically registering these devices as having static IP addresses and dynamically reassigns those same IP addresses to other devices on my network.

I have had fixed/static IP addresses on devices for years. Mostly for a printer and NAS storage that I want to be able to get at with a browser. None of the routers I have used has a "static" flag in the router's tables. The router has simply showed the fixed IP address as owned by the devices in question. It hasn't played games and reused a "fixed" IP address for other devices.

 


You wrote earlier, “It does allow you to make an "Address Reservation" but that is something else.” Actually after five phone calls and several hours with multiple Netgear technical-support specialists (I just got off the phone with them), it turns out that is precisely where I am to force my router into recognizing my assigned static IP addresses.

 

There have been conversations here over the benefits of using reserved versus fixed/static IP addresses. A regular here who knows more about this stuff than I do – and can explain things clearly –  suggested that reservations would be better. But there isn't much in it when it comes to the final result.

 

If you use an "Address Reservation" in the router you shouldn't need to set a fixed IP address on a device. The router does it and the effect should be the same. You seemed to be determined to have IP addresses fixed at the device level, which is why I said that this is a different function.

 

I can see that a fixed IP address can have advantages in you can change routers and not have to faff around with reservations.

 

If you go back to your first message you will see that it is thin on details. It took several iterations to get to where we are now. You have found problems with your router that Netgear can't explain.

Message 8 of 16
FURRYe38
Guru

Re: Nighthawk CAX30S LAN Configuration

You might "forget this" on each apple device, then disable the wifi radios on the apple devices, then power OFF the CAX30 for 30 seconds then back ON. After the CAX30 is bac online, enable the wifi radios, ONE at a time, then reconect one at a time and monitor the IP address seen on the CAX30. 

 

Also be sure to disable any MAC Address randomizers on Apple devices before connecting:

https://community.netgear.com/t5/Nighthawk-App/NETGEAR-Mobile-Applications-and-Apple-Devices-FAQ/td-...

 

Been months since I had it online so I don't remember off hand. Been testing a CAX80. I run same DHCP pool configuration on the 80. 


@ecolucci wrote:

"STATIC IP ADDRESSES...reside OUTSITE of a host routers default DHCP IP address pool."   This is the way my router currently is configured although I did not have it set up this way originally.  I adjusted the DHCP pool after the fact, unplugged everything, and restarted the CAX30.  I thought that would have reset everything.  However as of this writing, the problem persists: two IP addresses for two devices (iPod Touch and iPad) are replicated in the Address Reservation list and in the Attached Devices list.

 

I asked myself if it is possible those two devices have two WiFi MAC addresses without my previously being aware of this possibility, but I checked both devices more than once and also checked my settings from my previous router's configuration, and I cannot see what I am missing--if anything.  Out of curiosity, you stated you have a CAX30.  What firmware are you on?  Mine is using Firmware Version V1.4.12.2.


 

Message 9 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

For what it’s worth, I worked out the source of my trouble: an addled brain…. A large part of my confusion is that my tablet and iPod are in fact using two MAC addresses thanks to a privacy feature called Private Wi-Fi Address, which either is turned on by default and went unnoticed by me, or I turned it on when I first got those two devices and then promptly forgot all about that feature. This means the Attached Devices list is correct, and my “need” for adding the “correct devices” as reserved addresses in the DHCP pool to “force” my router to recognize those devices never existed so I deleted them. My LAN configuration is clean now with everything working as it should--with the possible exception of my brain….

Message 10 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

Sorry michaelkenward and FURRYe38, I did not see either of your messages until after I posted my 2023-09-11 09:05 AM message. FURRYe38 refers to Apple “MAC Address randomizers.” I did not read the article to which he linked, but I suspect based on my “discovery” of a Private Wi-Fi Address setting in my Apple devices that you’re referring to the same thing. Thanks to both of you for your time.

Message 11 of 16
FURRYe38
Guru

Re: Nighthawk CAX30S LAN Configuration

Ya, Apple in there infinate wisdom decided to implement that mac randomizer on there devices. Android did the same thing. Causes host names and MAC addresses to be masked by DEV info, meaning some random device. Which when your out side of the home and traveling and connecting to open or unknown wifi sources, keeps the device secure as possible in this environments. However when your at home, I personaly don't think is needed nor do I have these enabled while at home. Any router won't be able to know what the device is, just that it give an IP address to the device as I presume the main intent behind the randomizer. Not needed while at home IMO. So why we meantion disabling it when people post issues with some of these device.

 

Glad you got it working. Be sure to save off a back up configuration to file for safe keeping. Saves time if a reset is needed.
https://kb.netgear.com/24231/How-do-I-back-up-the-router-configuration-settings-on-my-Nighthawk-rout...
Enjoy. 📡

 

Message 12 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

Now that I was made acutely aware of this feature in Apple devices, I don't foresee additional problems and personally appreciate the feature (now that I am aware of it).  Eh, live and learn....

Message 13 of 16
ecolucci
Tutor

Re: Nighthawk CAX30S LAN Configuration

“I can see that a fixed IP address can have advantages in you can change routers and not have to faff around with reservations.”        Exactly.
 
“If you go back to your first message you will see that it is thin on details.”       Yep, I was at fault there. I also noticed—after rereading the entire thread—that I started on one topic with the intention to start a different discussion pertaining to a second related topic but then completely unintentionally blended the two topics together into this single discussion thread. Anyway, the matter is resolved now, and—as I stated elsewhere—I do appreciate the time you and FURRYe38 expended to try to help.

Message 14 of 16

Re: Nighthawk CAX30S LAN Configuration

That Apple thing is one reason why we ask people what devices they have on their networks. Hence my first response to your original message.

 

The random Mac address causes more traffic here than it should.

 

And, get this, it is also an option in Windows 11. As yet we haven't seen reports here of this. We have to deal instead with issues with Public/Private networks.

Message 15 of 16
FURRYe38
Guru

Re: Nighthawk CAX30S LAN Configuration

Always good to learn.


Enjoy now. 

 

Message 16 of 16
Top Contributors
Discussion stats
  • 15 replies
  • 12544 views
  • 1 kudo
  • 3 in conversation
Announcements

Orbi WiFi 7