IPv6 compiled into systemd is most likely for systemd-networkd. If you're not using that part it shouldn't be a problem. If you're using systemd-networkd, you can configure it to not do IPv6.

But, I would recommend configuring your system to not use IPv6 instead of removing support. That should prevent most programs from trying IPv6.

Daniel

On Oct 13, 2017 7:29 PM, Daniel Frey <djqfrey@gmail.com> wrote:

I switched ISPs a couple months back and have been struggling with
networking issues (not LAN, just WAN.)

I have discovered that something is broken with my ISP's ipv6 support,
every time I go to a website there's a 10-second delay. When syncing
portage today I saw what the delay is: apparently it tries ipv6 twice,
fails, then resorts to ipv4 which works fine.

Most of my systems now have ipv6 support removed, and viola! no more
delays.

Except for the three systems I have that run systemd. I went in the
kernel config to disable ipv6, and it won't let me - looking at the
dependency list, it's systemd blocking this.

So *why* on earth is it a dependency when (from what I've been reading
after discovering this) many ISPs don't seem to support it properly yet?

And is there a way to build systemd without ipv6? Or am I going to have
to revert these three systems back to openrc?

Dan