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Forum Discussion
Netgear router not working after Internet Modem changed to Arris TG4482A
I upgraded my internet in the last month or so, which came with an Arris TG4482A Modem/Gateway, and my R7000P keeps dropping out constantly and my Xbox One won't even connect anymore at all. Event logs on the Arris show regular critical errors such as these:
| DHCPv6[16394]: 72001011-DHCPv6 - Missing Required Option 82 | 2022/1/3 21:36:40 | Critical |
| DHCPv6[16394]: 72001011-DHCPv6 - Missing Required Option 24 | 2022/1/3 21:36:40 | Critical |
| DHCPv6[16394]: 72001004-DHCPv6 Provision - 0 Retries Attempted with Last attempt at Mon Jan 3 13:36:38 2022 | 2022/1/3 21:36:40 | Critical |
| DHCPv6[16394]: 72001011-DHCPv6 - Missing Required Option 82 | 2022/1/3 21:36:39 | Critical |
| DHCPv6[16394]: 72001011-DHCPv6 - Missing Required Option 24 | 2022/1/3 21:36:39 | Critical |
Does the R7000P not work with this Arris model? It's running the latest firmware.
At this point, I'm thinking of ditching all Netgear equipment if I can't get this working.
Thoughts?
Chris
11 Replies
Your Arris TG4482A is between your ISP and the router. Errors in the gateway log indicate a problem with ISP provisioning of the gateway.
Three questions to start with.
Is your Arris TG4482A in bridge mode?
Does your ISP support IPv6?
Who is your ISP?
Kitsap wrote:Your Arris TG4482A is between your ISP and the router. Errors in the gateway log indicate a problem with ISP provisioning of the gateway.
Three questions to start with.
Is your Arris TG4482A in bridge mode?
Does your ISP support IPv6?
Who is your ISP?
Yes, the Arris Gateway is in Bridge mode, and the ISP is Rogers. I'm venturingout on a guess they do, since the logged errors are related to IPv6.
You need to do a sequential restart of your LAN. The sequence is important.
Unplug the power cord and ethernet cable from your modem and also disconnect the coax cable. Give it a couple of minutes, reconnect the coax and plug in the power. Give the modem ample time to complete the startup process and for the connection to stabilize.
Unplug the power from your router and give it a couple of minutes. Plug in the power to the router and give it a couple of minutes to complete the startup process and to stabilize. Reconnect the ethernet cable between your modem and router. The router should connect and the lights should indicate an internet connection.
Downstream devices should connect to your router, either via ethernet or wi-fi. The extra ethernet ports on the back of your modem will not be functional in bridge mode.
Make sure your router is configured to obtain an IPv6 address from your ISP.
That arris is a modem/router combo device. It causes a double nat.
A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT
Fixes? There’s 3 options but only use 1.
1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-ModeAn alternative to the list of options that plemans suggests is to follow the usual startup process:
First factory reset your R7000P router so that it forgets any settings from your old internet service. (You should do that anyway if you change your Internet account.)
Then restart your network in this sequence:
- Turn off and unplug modem.
- Turn off router and computers.
- Plug in and turn on modem. Wait 2 minutes for it to connect.
- Turn on the router and wait 2 minutes for it to connect.
- Turn on computers and rest of network.
The R7000P may then spot that you have asked it to connect to another router and it will allocate its own local IP address accordingly.
This is probably not the best option as it will make it difficult for you to access the browser graphical user interface (GUI) and may also land you with other double NAT issues.
The choice of all the available options is down to what tasks you want the TG4482A and the R7000P handle.
plemans wrote:That arris is a modem/router combo device. It causes a double nat.
A double nat happens when you cascade more than 1 router.
https://kb.netgear.com/30186/What-is-Double-NAT
Fixes? There’s 3 options but only use 1.
1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions.
2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-ModeThe Arris Gateway is in bridge mode, so shouldn't be a double-NAT situation (from my understanding from the article). I'm a Netgear Armor user, so that would make my subscription unusable by operating in AP mode (coincidentally, my Netgear Armor subscription has also become disabled). I do have an R7000 in AP mode that is running under the R7000P, but this has never been an issue. Both routers are updated to the latest firmware.
CanadianGuy wrote:The Arris Gateway is in bridge mode, so shouldn't be a double-NAT situation (from my understanding from the article).
Shouldn't and isn't are two different things.
The people who make these things have habit of using different terminology and ways of going about things. For a start, "bridge mode" means different things with different devices. For modem/routers, I prefer the term "modem only".
Your cascade of hardware is looking increasingly complicated.
Arris TG4482A > R7000P > R7000
Is there any wifi SSID visible from the Arris TG4482A?
