[OpenWrt-Devel] 6rd issues with 18.06-rc2 on ubnt-erx-sfp
dedeckeh at gmail.com
Tue Jul 31 04:01:27 EDT 2018
On Mon, Jul 30, 2018 at 12:02 AM Torbjorn Jansson
<torbjorn.jansson at mbox200.swipnet.se> wrote:
> On 2018-07-29 22:16, Hans Dedecker wrote:
> > On Fri, Jul 27, 2018 at 2:36 PM Torbjorn Jansson
> > <torbjorn.jansson at mbox200.swipnet.se> wrote:
> >> Hello
> >> i decided to try to upgrade my erx-sfp from an old snapshot (probably a year or
> >> so old) to 18.06-rc2.
> >> for the most part it worked out but there is something odd going on with my 6rd
> >> wan interface and i'm not sure where to start the troubleshooting.
> >> with luci-proto-ipv6 and 6rd packages installed i get a lot of stuff like this
> >> in syslog:
> >> 14:29:07 2018 daemon.notice netifd: wan6 (24771): Command failed: Unknown error
> >> 14:29:07 2018 daemon.notice netifd: Interface 'wan6' is now down
> >> 14:29:07 2018 daemon.notice netifd: Interface 'wan6' is setting up now
> >> 14:29:08 2018 daemon.notice netifd: wan6 (24856): Command failed: Unknown error
> >> 14:29:08 2018 daemon.notice netifd: Interface 'wan6' is now down
> >> 14:29:08 2018 daemon.notice netifd: Interface 'wan6' is setting up
> >> (dates removed to make log easier to fit in mail without line breaks)
> >> this repeats every second and 6rd interface seems to get ip adress but it is
> >> not quite working.
> >> plus i noticed under Network -> Interfaces in webinterface i now have two
> >> similar looking 6rd interfaces.
> >> one named WAN6 and thats the one i created and another one that cant be edited
> >> that's called WAN_6
> >> WAN6 is listed as protocol: IPv6-over-IPv4 (6rd)
> >> WAN_6 is listed as protocol: Virtual dynamic interface (IPv6-over-IPv4 (6rd))
> >> the last interface must be something new or a problem or something.
> >> it is also that interface that gets the ipv6 addresses.
> >> any idea whats wrong?
> >> or how to find out what command failed in the log?
> > Hi,
> > You cannot enable both an automatic 6rd interface (wan_6) and a manual
> > created 6rd interface (wan6); Either remove the manual created 6rd
> > interface or set iface6rd to 0 in the wan network config which will
> > disable the automatic creation of the 6rd wan_6 interface
> > Hans
> i'm not sure i get it.
> where is the auto created 6rd interface that can't be edited coming from if not
> from the one i created myself?
The auto created 6rd interface is created by the dhcp script
in case the 6rd DHCP option is received.
So it seems your ISP is providing 6rd info via DHCP
> the errors stopped once i changed "bring up on boot" on wan6 and ipv6 still
> works (after reboot) but i don't understand why.
This confirms my statement above about 6rd info being provided by DHCP
> the config i'm running with is exactly the same as i had on old version of
> openwrt/lede and it worked just fine.
> i guess something is different now.
Pretty sure nothing has changed recently related to the 6rd logic; I
guess it's a race condition between the wan_6 and wan6 interface which
was before not visible
> if i delete wan6 then I delete all 6rd settings like remote ipv4 address, the
> ipv6 prefix and so on.
If the automatic created 6rd interface gives you IPv6 connectivity
there's no reason to keep the manual created wan6 interface
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