It’s 2015: “Supports IPv6” should mean full support

It’s 2015. ARIN is finally out of IPv4 addresses, more than 20% of Google users in the US are using IPv6…and vendors are still doing a half-assed job with IPv6 support. I purchased a new TP-Link Wi-Fi router/modem recently, and it doesn’t fully support IPv6. It’s not good enough, and I will be returning it.

I purchased the Archer D5 “AC1200 Wireless Dual Band Gigabit ADSL2+ Modem Router.” The website blurb includes this:

IPv6 Supported. The next generation of Internet protocol, helping you to future-proof your network.

And the specifications page says: “IPv6 and IPv4 dual stack.”

I checked the documentation for how to configure IPv6. This FAQ walks through configuring IPv6 on several TP-Link devices. Note that it includes this line “…choose Connection type (Here we just set up PPPoE as an example, if you are not sure, please contact your IPv6 provider)”

In New Zealand, most ADSL services are delivered as PPPoA. The specifications page says this device supports PPPoA. My ISP provides native IPv6 via DHCPv6 PD. So everything should be good to go, right?

Not so much. The Archer D5 does indeed support PPPoA. It also supports IPv6 with DHCPv6 PD. But it doesn’t support IPv6 with PPPoA. It only supports IPv6 with PPPoE.

I have confirmed this with TP-Link support. They suggested that a future firmware update may resolve this, but they do not have any dates for this. They suggested I could try an IPv6 tunnel broker, but why would I want to use a tunnel when my ISP supports native IPv6?

This is disappointing. I will return the TP-Link device this week. I’ll tell them why at PBTech, but it probably won’t get back to the vendor. Anyone got any suggestions for a suitable replacement? I’m looking for these features:

  • ADSL2+ modem.
  • Dual-radio wireless, preferably with 802.11ac, but 802.11n may be acceptable.
  • Full IPv6 support for DHCPv6 PD via PPPoA

Shouldn’t be too hard? Maybe I should just stick with the SRX-110, and upgrade the Airport Express to a newer dual-radio version?

4 Responses to It’s 2015: “Supports IPv6” should mean full support

  1. What Lies Beneath (@sjiveson) July 13, 2015 at 9:33 pm #

    I’ve no direct experience but I believe Draytek have very good IPv6 support. I suspect the wireless won’t be up to much though and it’s a bit pricey. Personally, I’m using Ubiquiti kit in a completely unconverged/unintegrated way, 2x wireless APs with an Edgemax router and Zyxel ADSL modem. Prices are fairly low (not compared to a cheap all in one mind) but I’m not sure PPPoA is supported. Rock solid and very much better than the prior TP-Link box I had.

    Something I wish I’d seen when I got all that was RouterBoard, this looks pretty amazing for the money:

    A note on ADSL modems, the Zyxel I have is a shockingly old model, with software to match. The software is also the subject of many a vulnerability and I’ve never managed to update the firmware. However, its pretty much the best you can get for a reasonable price. I also bought a TP-Link jobbie to replace it but discovered that too had many of the same software vulnerabilities. Anyway, I’d just caution that the ADSL modem can be the trickiest part if you take the ‘dedicated to the job’ err, route.

  2. Lindsay Hill July 14, 2015 at 7:13 am #

    Thanks – I’ve heard good things about the quality of Draytek, and I know of a few people using them in a half-bridge mode, connected through to some other device. I could connect them through to a Time Capsule or Airport Express, but I’m not sure if it will be able to handle DHCPv6. I was hoping to combine the wireless + ADSL functions, but maybe not yet it seems.

    The Mikrotik/RouterBoard stuff is pretty interesting. A lot of performance for the money. The config can be a bit more ‘fun.’

  3. Nuno July 17, 2015 at 7:54 pm #

    I totally agree. I’m tired of reading release notes and conf guides and finding caveats where a certain feature only works with an IPv4 address. They should develop the features concurrently for v4 and v6 with no bias. And then you see rediculous articles claiming “OMG WHY IS IPV6 ADOPTION SO LOW?”….well, that’s why.

  4. dovydas August 7, 2015 at 5:19 pm #

    I successfully use Mikrotiks to provide IPv6 to our customers in my country.
    Just not sure about your ADSL requirement whether they have it.