SLAAC not working [solved]

[Greg Rivers]

On Tuesday, September 05, 2017 20:44:49 Andrey V. Elsukov wrote:
> On 05.09.2017 20:09, Andrey V. Elsukov wrote:
> >>>> $ ping6 fe80:XXXX:XXXX:4013:23::2%lagg0
> >>>> ping6: UDP connect: Network is unreachable
> >>>
> >>> Hmm. Can you show the second word of address in this example?
> >>> Is it not zero? I.e. fe80:XXXX: is correct or you missed '::' part?
> >>>
> >> Correct, neither of the XXXX parts are zero; the :: part is at the end of the address: ...::2%lagg0. Sorry for the obfuscation, but policy at $WORK about company information on public lists is very strict.
> > 
> > I think the problem is not with oce(4) driver.
> > Unfortunately, your router uses IPv6 LLA that is not compatible with
> > KAME based IPv6 stack that is used by all BSDs.
> 
> To be sure, you can check the output of
> # netstat -sp ip6 | grep 'scope rules'
> This counter will be incremented for each RA from this server.
>
Indeed:

# netstat -sp ip6 | grep 'scope rules'
        63 packets that violated scope rules
# rtsol -dD oce0
checking if oce0 is ready...
oce0 is ready
set timer for oce0 to 1s
New timer is 1s
timer expiration on oce0, state = 1
send RS on oce0, whose state is 2
set timer for oce0 to 4s
New timer is 4s
timer expiration on oce0, state = 2
send RS on oce0, whose state is 2
set timer for oce0 to 4s
New timer is 4s
timer expiration on oce0, state = 2
send RS on oce0, whose state is 2
set timer for oce0 to 1s
New timer is 1s
timer expiration on oce0, state = 2
No answer after sending 3 RSs
stop timer for oce0
there is no timer
# netstat -sp ip6 | grep 'scope rules'
        73 packets that violated scope rules

Looks like we've nailed it.

The network engineering guys say that setting the LLA on the routers as they do is a Cisco convention. The value chosen reflects the /64 prefix being published in the RAs. I guess that makes it easy at a glance to see which prefix is in use on a given network. I'll see if I can get them to change it and report back.

Thanks for your help!

-- 
Greg Rivers