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Title: IPv6 missing from the fiber connection
Post by: jensk on May 07, 2026, 10:40:13 PM

Hi all,

I got a fiber connection via TNG (Germany) and IPv4 works great.
But IPv6 does not work.

When I look at the logfile I see this messages:

Code Select

<13>1 2026-05-07T22:25:12+02:00 OPNsense.internal dhcp6c 79084 - [meta sequenceId="381"] dhcp6c_script: REQUEST on pppoe1 connected to server
<13>1 2026-05-07T22:25:12+02:00 OPNsense.internal dhcp6c 84865 - [meta sequenceId="382"] dhcp6c_script: REQUEST on pppoe1 prefix now 2a00:ffff:ffff:8000::/56

When I manually add a ipv6 address in the sub net, it is working. But that is of course not doable all the time.

Code Select

# ifconfig pppoe1 inet6 2a00:ffff:ffff:8000::1 prefixlen 64 alias
the "request prefix only" is disable. (I also tried it enable, same problem).

Does anyone has an idea what I did wrong?

I setup a new OpnSense 26.1.7_3-amd64 host, so it is a fresh install

I read: https://docs.opnsense.org/manual/how-tos/ipv6_dsl.html.

CU
Jens

Title: Re: IPv6 missing from the fiber connection
Post by: Patrick M. Hausen on May 07, 2026, 11:26:22 PM

What does TNG's documentation or their tech support say?

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English Forums => 26.1, 26,4 Series => Topic started by: jensk on May 07, 2026, 10:40:13 PM