ipV6 disconnecting on Orbi RBR850

We don't have any new info. Nothing from NG. 

Seems that between you and donawalt your seeing quicker failure rate than he has. 

Is Email logging enabled on your system when you were using it as your main router? 

Ya seems that for unknown reason the renewal isn't happening or being handled badly. What that cause is, needs to be determined if it's being caused on the ISP side and the RBR isn't handling it right or if the problem is only with the RBR handling. Being that donawalt has seen more up time with IPv6 on there system and your not, almost wanna say this is a contention between bad ISP services and bad handling on the RBR. 

You and donawalt also have different modem models as well so this could also play a role. 

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cdysthe wrote:

FURRYe38 I am back! I took a break from Netgear and used an Asus router for a while. But I am a Netgear guy so I went and bought an Orbi 852 system thinking this newer model would have the IPv6 issue resolved by now. I was wrong. It does still have the issue! Has there been development here? I now have some time to spend on this since so what do I do now to help getting this resolved once and for all? Have a look at this thread:

 

https://www.dslreports.com/forum/r33241126-Netgear-IPv6-Problems-With-Comcast

 

The thread went on "forever" and went nowhere but someone said: "I believe they found a problem with IPv6 DHCP renewal". And that is exactly what I think the problem is! DHCPv6 is not working correctly on Netgear devices so the IPv6 address is dropped when the lease is out and the IP is renewed. Currently that seems to be every 4 days on Xfinity in my area, and every 4 days I lose my IPv6.

 

Now what? 🙂

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FURRYe38 wrote:

We don't have any new info. Nothing from NG. 

Seems that between you and donawalt your seeing quicker failure rate than he has. 

Is Email logging enabled on your system when you were using it as your main router? 

 

Ya seems that for unknown reason the renewal isn't happening or being handled badly. What that cause is, needs to be determined if it's being caused on the ISP side and the RBR isn't handling it right or if the problem is only with the RBR handling. Being that donawalt has seen more up time with IPv6 on there system and your not, almost wanna say this is a contention between bad ISP services and bad handling on the RBR. 

 

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FURRYe38 I had normal logging enabled on my old RBR 752 but never saw anything unusual there. Everything runs smoothly except for renewal of IPv6. I have now given a Comcast tech all my account information and he will check this from their side, but last time I spoke to Comcast their conclusion was that my Netgear CM2000 "wasn't updated" whatever that means and gave me the number for Netgear. My modem has the exact firmware version that it should have on Xfinity. 

I do have another modem here, a Motorola MB8611 which is very similar to the CM2000 as far as specs go. Do you think I should try that? I am just afraid that if I put in the new modem I will not be able to re-enable the CM2000 if the problem isn't the modem. 

Btw, right now even when I get an IPv6 address I do not get IPv6 connections so it's worse now for some reason. Maybe because Comcast are messing with my connection? 

So email logging is enabled or disabled on your RBR? 

What FW version is on the CM2000? 

What CAT# LAN cable are you using between the CM modem and the RBR? 

Ya unfortunately the ISP HAS to update modem FW. We users can NOT manually update FW on C an CM series modems. The ISP has to do this. Of course, some ISPs will not update user owned modems. Why ISPs tell users to contact the modem mfr when they know full well that the modems have to be updated by the ISP. It's the only way. 

Yes it would be a good comparison test to give a different brand modem a try and see if same thing happens. 

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cdysthe wrote:

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I had normal logging enabled on my old RBR 752 but never saw anything unusual there. Everything runs smoothly except for renewal of IPv6. I have now given a Comcast tech all my account information and he will check this from their side, but last time I spoke to Comcast their conclusion was that my Netgear CM2000 "wasn't updated" whatever that means and gave me the number for Netgear. My modem has the exact firmware version that it should have on Xfinity. I do have another modem here, a Motorola MB8611 which is very similar to the CM2000 as far as specs go. Do you think I should try that? I am just afraid that if I put in the new modem I will not be able to re-enable the CM2000 if the problem isn't the modem. Btw, right now even when I get an IPv6 address I do not get IPv6 connections so it's worse now for some reason. Maybe because Comcast are messing with my connection? 

 

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FURRYe38. No, email logging not enabled. Would the email log have more information than the log you can see in the web interface? I have checked there every time this happens and there's nothing unusual going on there.

The firmware on the modem is the one Comcast pushes which is V1.01.08. I will try the new modem to see if that helps. Right now I am not getting IPv6 even with an IP. I really do not understand this. It worked until Feb 2022, then suddenly this started happening without me changing anything. Now I have replaced the router, but the problem is still the same: IPv6 is not being renewed when the lease is out. 

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cdysthe wrote:

No, email logging not enabled. Would the email log have more information than the log you can see in the web interface? I have checked there every time this happens and there's nothing unusual going on there.

We are seeing these mysterious reboots of the RBR on 7 and 8 series Orbis on recent versions of FW. We've determined that enabling email logging helps stave off these reboots. I would enabled it on your to see if this helps any. You don't have to post anything and you can deselect logging items to help limit what you see getting sent to your email.

https://community.netgear.com/t5/Orbi-WiFi-6-AX-and-WiFi-6E-AXE/Enable-Email-Logging-and-Router-Reboots/td-p/2231485/jump-to/first-unread-message

 

The firmware on the modem is the one Comcast pushes which is V1.01.08. Yes this is current for CC for the CM modem. So your good here. 

 

I will try the new modem to see if that helps. Right now I am not getting IPv6 even with an IP. I really do not understand this. It worked until Feb 2022, then suddenly this started happening without me changing anything. Now I have replaced the router, but the problem is still the same: IPv6 is not being renewed when the lease is out. If this is happening with a replaced router or different brand router, then this would be an ISP problem. 

 

 

 

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FURRYe38 I just lost IPv6 again - only about 29 hours later. There have been no restarts of the RBR850. Do you want me to change it to email logs? FYI the log file shows as empty. If you want me to do it, how do I do it - I can't find the setting?

This is a bummer. 

https://community.netgear.com/t5/Orbi-WiFi-6-AX-and-WiFi-6E-AXE/Enable-Email-Logging-and-Router-Reboots/td-p/2231485/jump-to/first-unread-message

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donawalt wrote:

I just lost IPv6 again - only about 29 hours later. There have been no restarts of the RBR850. Do you want me to change it to email logs? FYI the log file shows as empty. If you want me to do it, how do I do it - I can't find the setting?

 

This is a bummer. 

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Your not the only one. Just in his case, he went 24days with out seeing any IPv6 problems, then lost it. Now this latest one is 29 hours later again something happened. Seems like this maybe on the ISP side IMO. 

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cdysthe wrote:
So it's not only me. That's somewhat reassuring.

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It's morning here FURRYe38 , and I jumped on my laptop and discovered IPv6 is out again - less than 10 hours later. I wonder if because of some issue the lease has been shortened until the connection works better. Netgear web page for the router did show an IP address, after the auto detect it was the same router IPv6 address; I never checked to see if it was the same. Anyway - I am turning on the email setting now.

FURRYe38 here's an interesting one - to test the sending logs to email, I turned on 'Router operation' messages to get some in quickly, so I could send a log. Instantly I had a ton of messages in the log, some from hours ago. So Maybe they are always there in the log (or in some internal log that is getting filled), and the setting just control what you see and what gets emailed? Anyway, send logs to email is now on and working.

It's just that you and I are not meant to have IPv6. 😡

Ya we are tracking some bad logging behavior with in the logging code. Seems that the logging is not clearing out itself after reaching a limit and is being handle badly. So for now don't worry about what your seeing. You can deselect most of the logging items that you don't use or need. Were hoping the NG can fix the logging issues. 

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donawalt wrote:

Here's an interesting one - to test the sending logs to email, I turned on 'Router operation' messages to get some in quickly, so I could send a log. Instantly I had a ton of messages in the log, some from hours ago. So Maybe they are always there in the log (or in some internal log that is getting filled), and the setting just control what you see and what gets emailed? Anyway, send logs to email is now on and working.

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FarmerBob1 wrote:

It's just that you and I are not meant to have IPv6. 😡

 

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I think the problem is that you and I are one of the few who cares about IPv6! Even Netgear is treating it as an afterthought burying it deep into the web UI under Advanced and not supporting it at all in the app. That has to change! They could at least acknowledge the issue. If they did and let me know when they will have it fixed I would gladly wait. But this total silence around this issue from NG is unnerving. 

Lost IPv6 again tonight - 10 days since the last time, firmware version V4.6.8.5_2.1.9, RBR850 and 2 RBS850s. It's better than it was, but they still haven't fixed it yet. It's been about 6 months now.