dhcpcd-discuss

On 26/03/2019 06:16, Remi Locherer wrote:
> On Tue, Mar 26, 2019 at 12:54:11AM +0000, Roy Marples wrote:
> > On 25/03/2019 06:48, Remi Locherer wrote:
> > > > > The log also shows another issue:
> > > > > Renew does not work and dhcpcd needs to do a rebind. This is because the
> > > > > DHCPv6 server from my ISP does not answer renew requests sent using unicast.
> > > > > --> https://www.as13030.net/status.php#collapse_12863 : issues with PD
> >
> > > Mar 25 06:57:12 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 10.3 seconds
> > > Mar 25 06:57:22 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 20.2 seconds
> > > Mar 25 06:57:42 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 40.8 seconds
> > > Mar 25 06:58:23 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 77.6 seconds
> > > Mar 25 06:59:41 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 151.3 seconds
> > > Mar 25 07:02:12 blau dhcpcd[88652]: em2: unicasting RENEW6 (xid 0x38fce6), next in 309.1 seconds
> > > Mar 25 07:07:12 blau dhcpcd[88652]: em2: failed to renew DHCPv6, rebinding
> >
> > I've added a commit to dhcpcd which makes this work:
> >
> > interface em2
> > 	nooption dhcp6_unicast
> >
> > This should stop dhcpcd from unicasting the renew request and will broadcast
> > it instead.
> >
> > https://roy.marples.name/git/dhcpcd.git/commit/?id=01c95afadf6231ae7dced05537f95995f086f573
> >
> > Let me know if this fixes your problem with renew.
> > Clearly, rebind is still an issue, but if renew works maybe that will go
> > away.
>
> With this renew works and all interfaces keep their IPv6 address. Thank you!

Awesome sauce!
That is one badly broken DHCPv6 server :(

> Something with 'script ""' seems not to work as expected.
>
>
> Mar 26 06:08:16 blau dhcpcd[9558]: dhcpcd-7.1.1 starting
> Mar 26 06:08:16 blau dhcpcd[9558]: em1: executing `""' PREINIT
> Mar 26 06:08:16 blau dhcpcd[9558]: script_runreason: "": WEXITSTATUS 127
> Mar 26 06:08:16 blau dhcpcd[9558]: em1: executing `""' CARRIER
> Mar 26 06:08:16 blau dhcpcd[9558]: script_runreason: "": WEXITSTATUS 127

Yes, I posted a fix for this the other day.
Here it is again:
https://roy.marples.name/git/dhcpcd.git/commit/?id=f17480d3e1e914d03fea0c054a028fe979742950
https://roy.marples.name/git/dhcpcd.git/commit/?id=97bb60296dc42a29a054ebf9347ac31a7d787393

Hopefully dhcpcd is now working sweetly for you :)

Roy