Not getting an ipv6 address with Merlin on a RT-AC5300

[Nitin]

Interesting.....IPv6 is never even getting started (there are no debug log entries at all).

Can you tell me a bit more about your network? I see you have a rather extensive set of devices from many manufacturers....and they appear to be 'thrashing' to get an address. Is there any chance you have another device that is acting as a DHCP/DNS server?

Nope, no device is acting as a DHCP/DNS server. The network that I have consists of :

1. a few computers
2. phones
3. gaming devices
4. home automation devices like thermostats, light switches, etc.

In short, nothing extraordinary. Despite the thrashing, all devices are online. I did turn on MU-MIMO, but I doubt that's causing ipv6 to not even kick off.

 

[john9527]

viia telnet/ssh, what's the result of

nvram get link_internet

 

[Nitin]

viia telnet/ssh, what's the result of

nvram get link_internet

Just the number "2". Screenshot below:

 

[john9527]

That's the expected value for link_internet.....

Last thing in pure guess mode.....try toggling the Comcast option at the bottom of the Tools>Other Settings page.

 

[Nitin]

That's the expected value for link_internet.....

Last thing in pure guess mode.....try toggling the Comcast option at the bottom of the Tools>Other Settings page.

Tried that as well, no luck.

 

[Nitin]

Just for the heck of it, I plugged in a Netgear R8300 from a friend to see if it would get an ipv6 address. It did.

We also tried a different Asus AC5300 to rule out that I have bad hardware, same result on the swapped AC5300... no ipv6.

 

[john9527]

Sorry to say I'm out of ideas on this one. To go further, would require some debug code be added to the firmware or setting up a trace to see what is really going on.

 

[ColinTaylor]

What version of the firmware were you using on the AC3200 that worked compared to the AC5300 that doesn't?

 

[Nitin]

What version of the firmware were you using on the AC3200 that worked compared to the AC5300 that doesn't?

I don't have a way to verify this cause that router is no longer with me but if I were to guess, i'd say it was 378.56_0

Everyone, I very much appreciate all the brainstorming despite the lack of a solution. Thanks!

 

[matthew johnson]

I don't know if this will help but I turned of static dns addresses on the Lan dchp page and have been getting ipv6 and keeping it since then.

Sent from my Nexus 6 using Tapatalk

 

[ColinTaylor]

The only thing I can suggest is that you put on the oldest firmware available, reset to factory defaults and see if that works.

 

[john9527]

@ColinTaylor get's another gold star

Try loading 380.57....if that works, there are about 5 or 6 commits between that and 380.61 that I would consider 'likely' candidates for having changed something.

 

[BlueFrog]

I am also not getting an IPv6 address in the latest build, 380.61 on an AC87R on Comcast. I can plug my laptop directly into the cable modem and it will be assigned an IPv6 and I had IPv6 working correctly on older builds. Now my IPv6 is all set to DHCP-PD and it is pulling nothing. Finally, if I set a manual IPv6 DNS server into the GUI and do a "ping6 {site}" the ping6 will properly resolve the DNS but will not receive any ping responses.

I have tried all the switches and reboots recommended above.

Attaching a couple of screeners:
All automatic, no IPv6

Specifying a local IPv6 DNS:

No ping response from the command line:

I am not sure I can downflash, as per the change logs, but will try that tomorrow.
Any other ideas on this, or should I start my own thread? (new to this board, but have been using Merlin for years)

-BlueFrog

 

[BlueFrog]

Well, I cannot down flash, due to new firmware regulations. However, I did try the OEM Asus firmware and I have the same result, no IPv6 address. I also tried the latest Merlin Alpha build, again no IPv6. Any ideas why this is broken?

 

[bbunge]

Well, I cannot down flash, due to new firmware regulations. However, I did try the OEM Asus firmware and I have the same result, no IPv6 address. I also tried the latest Merlin Alpha build, again no IPv6. Any ideas why this is broken?

Use the Asus recovery tool to go back to older firmware. It does work!

@ColinTaylor Here's a screenshot of System Log -> IPv6.
View attachment 7153

@john9527 switched DHCP query freq to "normal" and rebooted. No change.

Sent from my P01M using Tapatalk

 

[john9527]

Well, I cannot down flash, due to new firmware regulations.

For now, you can still downlevel by using the ASUS Firmware Restoration Tool.

 

[RMerlin]

Those with IPv6 issues, make sure you don't set SSH to LAN+WAN. There's currently an issue being reported related to this (it's hard to investigate as I can't reproduce it with my 6in4 tunnel).

 

[BlueFrog]

Thanks bbungie and john9527, I will try the asus restoration tool.

RMerlin, thanks again for everything, but just to report my ssh is currently off.
Also here is my IPv6 log screener, I appear to be pulling the IPv6 gateway, but not an IP.

 

[GamingMacGyver]

Those with IPv6 issues, make sure you don't set SSH to LAN+WAN. There's currently an issue being reported related to this (it's hard to investigate as I can't reproduce it with my 6in4 tunnel).

I was able to get a IPv6 address when I changed my Auto Configuration Setting from Stateless to Stateful.
( I am using a Native connection)
I hope this helps ....