RT-AC86U and IPv6

[nospamever]

RT-AC86U Firmware 386.14_2
My test setup is laptop > RT-AC86U > modem/router (DHCP and ipv6 enabled) > WAN
My ISP is using PPoE so I set the RT-AC86U as PPoE and ipv6 as Native. Tested with google ipv6 test and result returned negative so only ipv4 is active.
I connect my laptop directly to the modem/router, did the ipv6 test and returned positive. So pretty sure the RT-AC86U is not configured properly.
Hoping someone can help where I did wrong. Cheers.

 

[nospamever]

It works now. I simply mess around the ipv6 settings on RT-AC86U.
I disabled Accept Default Route and apply. No joy.
Then I disabled Accept Default Route and apply. Full joy. The trick is WAN prefix length is not 64 but 56.

 

[heysoundude]

It works now. I simply mess around the ipv6 settings on RT-AC86U.
I disabled Accept Default Route and apply. No joy.
Then I disabled Accept Default Route and apply. Full joy. The trick is WAN prefix length is not 64 but 56.

welcome to the 21st century.

to those who happen to find this, you need to know that IPv6 is available from your ISP before following on the path laid out here; you should also have a bit more background and understanding of how it differs from IPv4.

For that, I suggest taking a few levels of Hurricane Electric's IPv6 "certification" course, which is free online at ipv6.he.net/certification

2 or 3 levels of that will take an hour or 2, and open doors you may find necessary in the future. (your HE credentials get you tunnelbroker DDNS access, for instance, if you should happen to need/want that. there are some other cool things too, but let's not get too far ahead...)

 

[Tech9]

I suggest taking a few levels of Hurricane Electric's IPv6 "certification" course

Here we go again... Do they teach Asuswrt IPv6 settings?

My test setup is laptop > RT-AC86U > modem/router (DHCP and ipv6 enabled) > WAN

If you have ISP modem/router and your Asus is in double NAT behind it - IPv6 configuration on the Asus has to be Passthrough. In fact your ISP gateway will manage IPv6 for your network, but it will work as expected with Asus clients getting IPv6 addresses.

 

[heysoundude]

Here we go again... Do they teach Asuswrt IPv6 settings?

no, they teach how the system works in such a way that you can/should be able to understand which settings to address in the setup of a router. Last I checked, IPv6 isn't Asus-exclusive; while this forum is Asus-specific, it's results end up in web searches that both humans and AI tend to cite.

 

[Tech9]

This is unrelated to the specific device questions with partial IPv6 support firmware. Asus had issues with IPv6 DDNS for a long time (not sure if fixed now) as an example and HE has nothing about it in their theoretical IPv6 courses. Spending 2h time will result in no resolution of device specific issue. This is the reason folks ask specific questions here and expect some related answers.

You used to run scripts with no IPv6 support on a firmware with IPv4 only features, remember? It's the same RT-AC86U router on now unsupported 386 base firmware, EoL device, it is what it is situation for both IPv4 and IPv6 and anything else broken on it.

 

[nospamever]

@heysoundude @Tech9
Thanks both for your posts. I have read a bit more about ipv6. More importantly the potential issues and benefits. Not having much tech background, I think currently there is no need for me to use ipv6 until I understand how to properly configure my router. So I have disabled ipv6 at my modem.

 

[Tech9]

If you have public IPv4 available just keep IPv6 at default disabled. Provides no benefits, opens second door to your network.