#1136358 dhcpcd: slaac token: invalid token

#1136358#5
Date:
2026-05-12 13:16:37 UTC
From:
To:
Dearest Maintainer,

I use IPv6 ip-token(1) "stable interface ID" addressing in my networks
where dynamically delegated prefixes are provided by the ISP.

With ifupdown and the kernel SLAAC client configuring this is as simple as

    pre-up ip token set ::cafe:4242 dev $IFACE

At first glance dhcpcd seems to support something similar using
--slaac='token ::4242' however the parsing code seems to be broken and this
will never actually take effect. I get a "slaac token: no token specified"
error no matter what (other) concievable syntax I try, eg.:
--slaac='token=::4242', --slaac='token 4242'.

Both Trixie and Sid are affected.

#1136358#12
Date:
2026-05-12 15:14:31 UTC
From:
To:
Thanks. Could you report this upstream and link to this bug?

It's a minor issue, but it sadly is one of many papercuts that
upstream has been slow at fixing. Maybe if someone other than me pings
him, he'll eventually act.

Martin-Éric