IPv6 for fiber customers?

Advanced feature discussion, beta programs and unsupported "Labs" features.
44 posts Page 4 of 5
by paulcoldren » Tue Jan 15, 2019 11:55 pm
I also use IPv6 extensively for work and it's inconvenient not having it at home. I'd be interested in any early access / beta programs available. I use my own router.
by parker_day » Wed Jan 23, 2019 3:24 pm
It's really a bummer that in 2019 that is provided is 6rd. AT&T and Comcast both have native IPv6, although I do realize they may pull more weight with equipment suppliers.
by corysfo » Thu Feb 21, 2019 11:57 am
Just to throw my name in there, too, i really need IPv6 for work. It's killing me that Sonic doesn't have this yet. i'm hoping that this is a serious priority for Sonic.
by Spacebass » Thu Feb 21, 2019 1:00 pm
hey folks - I've had good luck implementing the tunnel on pfSense (my router). But when I use IPv6 sites, I max out at 100mbs. Is that a function of my tunnel?
The only other thing in the mix is a dumb gigE switch between my ONT and my pfSense box (in case I want to give something else a public IP... like the vpn/AP device my work gives me that I don't want anywhere on my network :)
by nveeser » Sun Mar 10, 2019 7:59 pm
Wanted to throw my name as well for looking for IPv6

I also wanted to ping the IPv6 Experts here to make sure its not just me misconfiguring.
I am running a Mikrotik RouterOS, so configs are a little special.

So I went to the Labs config page to "request" an allocation.
I got:

Transport:: 2001:05a8:0000:0001:0000:0000:0000:227a/127
Network:: 2001:05a8:0004:0050:0000:0000:0000:0000/60

I assume the first is the address of the of the 6to4 interface I should create, and the second is the allocated address space I should use? Maybe?

So I created a 6to4 tunnel interface with my WAN IPv4 and the specified tunnel endpoint.

I picked a /64 from the address space 2001:5a8:4:55::1/64 and assigned it to the LAN side.
I enable RA messages for that interface.
I also enabled ND for the LAN interface to advertise DNS and the prefix.
I also enabled ND for the WAN 6to4 interface (?) but disabled DNS and configuration, just MAC addr.

Which works and now my hosts are picking addresses.
And I can ping the router. I can also ping the 6to4 interface.

But of course I cannot ping anything through there.
Looks like my packets head through the 6to4 interface and disappear.

Is that pretty much expected until the IPv6 is supported in some state?

by danielg4 » Sun Mar 10, 2019 10:21 pm
You mean 6in4.
by fiber » Wed Jun 26, 2019 7:02 am
I'm considering fiber from Sonic since it was just offered it in my area but I do want ipv6 support. What's going on?
by mgsullivan » Thu Mar 09, 2023 10:35 pm
I got it working on my fiber account! Although the download speed drops to 400-500 Mbps when I enable it on my router. Not sure if this is because of my router or because of the sonic server.

There was a couple of details missing / confusing in the configuration details.

Firstly, the tunnel type is 6in4
Secondly, the ipv4 server-side address for the tunnel is
Thirdly, the ipv6 server-side address is the one listed as "Transport::" on the Labs->IPv6 Tunnel page in the Sonic customer portal (the one that ends in /127)

Lastly, and most confusingly, you need to set the current IPv4 Address of your router in the Labs->IPv6 Tunnel page. Where it says "Your current tunnel endpoint is:" you need to enter your current Sonic IP address. Once you enter it, click the "View/Request/Change Tunnel" button and it will be saved. I'm guessing you need to update it every time your IPv4 address changes.

I have it working on my ASUS router, using the 6in4 Tunnel option with the following values:

The Server IPv4 Address is (and will be the same for everyone).
The Client IPv6 Address is the ipv6 address that Sonic calls "Network::" on the Labs->IPv6 Tunnel page (the one that ends with /60)
IPv6 Prefix Length is 60
Server IPv6 Address is the ipv6 address that Sonic calls "Transport::" on the Labs->IPv6 Tunnel page (the one that ends with /127)

I set LAN IPv6 Prefix to the Client IPv6 Address from above, and LAN Prefix Length to 64 (60 should work too).
by davygrvy » Mon Apr 24, 2023 12:06 pm
Stay with the tunnel as it gives you 16 subnets! Native just got turned on for me and it is rather broken.
Screenshot from 2023-04-19 17-20-16.png
Screenshot from 2023-04-19 17-20-16.png (20.75 KiB) Viewed 2787 times
Notice that the prefix delegation size is /64 when it should be /56. A /64 delegation can not be divisible; it is only one address block. It is useless for subnetting.
Assigning a /64 or longer prefix does not conform to IPv6 standards and will break functionality in customer LANs. With a single /64, the end customer CPE will have just one possible network on the LAN side and it will not be possible to subnet, assign VLANs, alternative SSIDs, or have several chained routers in the same customer network, etc.
Best Current Operational Practice for Operators: IPv6 prefix assignment for end-users - persistent vs non-persistent, and what size to choose
by julianoster » Sun May 07, 2023 10:42 am
davygrvy wrote: Notice that the prefix delegation size is /64 when it should be /56. A /64 delegation can not be divisible; it is only one address block. It is useless for subnetting.
This is rectified on newer enablements, I get a /56 prefix.
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