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mnd999

Member

Registered: 2018-03-07

Posts: 9

Did something change on IPv6 stateless autoconfig

I'm using netctl to configure my network on a desktop PC with a wired lan.

The profile is as follows and hasn't really changed forever:

Description='A basic dhcp ethernet connection'
Interface=enp11s0
Connection=ethernet
IP=dhcp
DHCPClient=dhcpcd -6
IP6=stateless

However, in recent weeks the IPv6 address seems to be getting lost. Right after rebooting the maching the stateless configuration works, but after a few minutes the IPv6 addresses all get lost and it's stuck on V4. Other stations on the LAN work fine, as does this PC when booted into FreeBSD. Have I missed a change in this area? Is there anything I can do to debug this further? I'm not sure how to force a router solicitation under Linux with netctl.

Thanks,

Mark

progandy

Member

Registered: 2012-05-17

Posts: 5,280

Re: Did something change on IPv6 stateless autoconfig

dhcpcd expects to be responsible for both IPv4 and IPv6. If you run it in v4-only mode, then it disables the kernel ipv6 handling. This decision has been reversed in git.
You can try to either

• use dhclient for ip4,

• set IP6=dhcp,

• downgrade dhcpcd,

• use the git version of dhcpcd.

By the way, for a time you were considered crazy for using the kernel implementation: https://github.com/rsmarples/dhcpcd/com … f9c0e3f0d9

DHCPClient=dhcpcd -6

that is useless, you can remove the -6 here.

Last edited by progandy (2018-03-07 19:50:59)

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mnd999

Member

Registered: 2018-03-07

Posts: 9

Re: Did something change on IPv6 stateless autoconfig

I prefer crazy and working to sane and broken any day.

Thanks for the pointers, I guess I need to tinker with it some more.

rsmarples

Member

Registered: 2009-05-12

Posts: 287

Re: Did something change on IPv6 stateless autoconfig

By the way, for a time you were considered crazy for using the kernel implementation: https://github.com/rsmarples/dhcpcd/com … f9c0e3f0d9

I still consider people that want that as crazy