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Computers & Hardware => Networking => Topic started by: Jon21 on April 29, 2018, 04:53:55 PM

Title: How do you setup IPv6 on a Asus router?
Post by: Jon21 on April 29, 2018, 04:53:55 PM
Hi, I was just wondering if anyone has managed to setup IPv6 with a Asus router? I’ve switched back to using my Asus RT-AC88u, running the latest Merlin firmware. I’m with AAISP, who I think do “native” IPv6.

In IPv6 settings of the router, I’ve selected “Native” from the drop down menu. This then filled in the IPv6 address fields with my connections IPv6 address. I’ve filled in the IPv6 DNS fields with a mixture of Cloudflare’s and Google’s IPv6 DNS. I then applied it and rebooted the router. When I go to ipv6-test.com, it comes back with IPv6 not supported. Any ideas? Probably missed a setting somewhere.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: Weaver on April 29, 2018, 05:49:15 PM
AA certainly do do native IPv6. I have it working. Maybe some screen shots from the router unless we have an Asus expert around of course? What kind of internet connection do you have?

There may be some option you need to tick in the router like RA or something.

Is your machine getting / generating some IPv6 addresses correctly (a netstat or ifconfig don't know what o/s you're using)?

What happens if you traceroute to bottomless.aa.net.uk ?

Also can the router show you what IPv6 addresses it has for itself?

DNS: You can just use AA’s DNS servers, they are very good, and obviously very close, unless you have special requirements for, say, filtering. And your router may well be a relay DNS cache for the machines on your LAN.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: Jon21 on April 29, 2018, 06:14:47 PM
I'm on VDSL2. If I do a ipconfig, I get this:

Windows IP Configuration

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2001:8b0:b046:b4ef:3020:6fb4:32a7:96eb
   Temporary IPv6 Address. . . . . . : 2001:8b0:b046:b4ef:18aa:1d10:f65c:c3d0
   Link-local IPv6 Address . . . . . : fe80::3020:6fb4:32a7:96eb%14
   IPv4 Address. . . . . . . . . . . : 192.168.1.179
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : fe80::1eb7:2cff:fe75:e5a0%14
                                       192.168.1.1

Ethernet adapter Bluetooth Network Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . :
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:ce6:125d:3f57:fe4c
   Link-local IPv6 Address . . . . . : fe80::ce6:125d:3f57:fe4c%11
   Default Gateway . . . . . . . . . :

I've attached a screenshot of the IPv6 settings page.

If I do a traceroute to bottomless.aa.net.uk, I get:

Tracing route to bottomless.aa.net.uk [81.187.81.187]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  router.asus.com [192.168.1.1]
  2    13 ms    12 ms    13 ms  bottomless.aa.net.uk [81.187.81.187]

The only setting I wasn't sure of was where it says "Interface". I've got a choice of PPP or Ethernet.

Edit: Would it be because I'm not getting a "WAN IPv6 gateway".
Title: Re: How do you setup IPv6 on a Asus router?
Post by: burakkucat on April 29, 2018, 07:18:00 PM
The only setting I wasn't sure of was where it says "Interface". I've got a choice of PPP or Ethernet.

Edit: Would it be because I'm not getting a "WAN IPv6 gateway".

I am really not that IPv6 knowledgeable but I can say that "Interface" should be PPP and, yes, the lack of an IPv6 WAN gateway would be a problem.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: Jon21 on April 29, 2018, 07:29:16 PM
I am really not that IPv6 knowledgeable but I can say that "Interface" should be PPP and, yes, the lack of an IPv6 WAN gateway would be a problem.
Thanks, not sure why it’s not picking up on a IPv6 WAN gateway though.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: burakkucat on April 29, 2018, 07:37:24 PM
Silly question from me, maybe, but does A&A have generic router IPv6 setup instructions in their Wiki?
Title: Re: How do you setup IPv6 on a Asus router?
Post by: highpriest on April 29, 2018, 10:14:00 PM
Silly question from me, maybe, but does A&A have generic router IPv6 setup instructions in their Wiki?

They've got some configuration information for a different model of ASUS router.

https://support.aa.net.uk/ASUS_RT-AC68U_Intial_Setup

It advises using Static IPv6 instead of Native.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: burakkucat on April 29, 2018, 10:26:47 PM
They've got some configuration information for a different model of ASUS router.

Ah, thank you. That may be sufficient enough for Jon21 to see what would be required.
Title: Re: How do you setup IPv6 on a Asus router?
Post by: Jon21 on April 29, 2018, 10:44:07 PM
They've got some configuration information for a different model of ASUS router.

https://support.aa.net.uk/ASUS_RT-AC68U_Intial_Setup

It advises using Static IPv6 instead of Native.

Thanks highpriest, that's perfect. Followed that and I'm getting an IPv6 address now :)

Thanks to Weaver and burakkucat as well :)
Title: Re: How do you setup IPv6 on a Asus router?
Post by: Weaver on May 01, 2018, 02:14:51 AM
I think perhaps Native means 'not PPP'?

Burakkucat wins the toblerone because he spotted it. I've been asleep for the entire day (until 21:00) so missed everything.

By the way, I should have told you to traceroute to [explicitly the literal ipv6 address of bottomless.aa.net.uk] if I had had any sense.

FYI that is

bottomless.aa.net.uk :
    2001:8b0:0:81::51bb:51bb
    81.187.81.187

btw: 0x51, 0xbb equates to 8110 18710 as an aide memoire.

And as I suggested before, worth trying the AA DNS servers, I haven't found any to compelling reason to use others further away, unless you need censorship. Would be interested to see the results of dnsbench. Another reason in favour of AA DNS is that the closer the server the more reliable the path to it is because there are fewer links to fail. And you know who to shout at. If you don't mind likely censorship or fiddling with NXDOMAIN you could have a mix of AA plus someone else for even more reliability, such as say 8.8.8.8/8.8.4.4 or the new 4.4.4.4 and 1.1.1.1 (and there is also OpenDNS whom I have used aeons ago and whose service is configurable provided you create an account in which case you can turn of the horrible tampering with NXDOMAIN.)