On 2014-05-02, Thorsten Bonck <thors...@bonck.net> wrote:
> On Fri, May 02, 2014 at 08:14:40PM +0000, Peter J. Philipp wrote:
>> On Fri, May 02, 2014 at 09:14:16PM +0200, thors...@bonck.net wrote:
>> > > maybe you could try to put pppoe0 on rl0, untag vlan10 on switch port
>> > > where rl0 is connected and tag other vlans on the same port ...
>> >
>> > Sadly, that is not possible for me.
>> > rl0 is directly connected to a Ubiquiti NanoStation M, which is setup as
>> > a blackbox transparent bridge by my ISP.
>> > vlan id 10 is also required by my ISP for all PPP/PPPoE stuff.
>> > I could put a tagging switch in between rl0 and the bridge as a last
>> > resort, but for right now I am still looking for a reason why 5.4 works
>> > and 5.5 seems to answer to a wrong MAC.
>> >
>> > Looking through the changes from 5.4 I found "Stop defining
>> > SIOC{S,G}ETVLAN as SIOC{S,G}IFGENERIC. Lets vlan(4) handle
>> > pppoe(4)-specific ioctls and vice versa without smashing the stack of
>> > the caller". Is it possible my problem is somehow connected to that?
>>
>> Hello,
>>
>> I'd probably do a tcpdump -v -n -e -s 200 -X -i rl0 as well.. perhaps you
>> can see somewhere where the aa:aa:aa:aa:aa:aa is coming from. Perhaps there
>> is an offset logic error somewhere as the pppoe driver reads the PADO source
>> address from the mbuf etherheader which was prepended. If you can't make
>> out any AAAAAAAAAAAA's in the frame then that's further suspicous.
>
> After some staring at the dumped frames, I can describe the problem more
> detailed.
> Assume listed devices to have following macs:
>
> rl0 11:22:33:44:55:66
> PPPoE server aa:bb:cc:dd:ee:ff
>
> rl0 broadcasts PADI to ff:ff:ff:ff:ff:ff.
> PPPoE servers mac sends a PADO to rl0 mac.
> rl0 sends a PADR to mac aa:bb:55:66:aa:bb.
> timeout happens, since no device with aa:bb:55:66:aa:bb exists in the
> network.
>
> Now change rl0 mac to 11:22:33:44:77:88:
> PADI,PADO phase unchanged.
> rl0 sends a PADR to mac aa:bb:77:88:aa:bb.
>
> I only have a very basic understanding of C and basically no
> understanding of the OpenBSD kernel.
> The PADR should be assembled around line 703 in src/sys/net/if_pppoe.c
> but I could not find any clues where this mix up happens.
>
> Best Regards,
> Thorsten
>
>
I have pppoe-over-vlan working fine on 5.5 here. (More specifically:
multiple pppoe interfaces with pppoedev on a vlan, vlandev on a
trunk, failover trunk over a pair of bnx - trunk/bnx both show
VLAN_HWTAGGING in "ifconfig hwfeatures").
Considering what may be different between your setup and mine,
I'm wondering if it could be either 1) your use of lladdr to adjust
the MAC address or 2) use of rl(4) which doesn't do hw tagging..
