netisr+lagg+fragments=80% packet loss

[Andrew Thompson]

2012/2/25 Eugene Grosbein <egrosbein at rdtc.ru>:
> 25.02.2012 00:14, Eugene Grosbein пишет:
>> This problem occurs only when net.isr.direct=0/net.isr.direct_force=0.
>> And only when lagg1 has both ports up and running. And when I use oversized pings.
>> At the same time, transit oversized pings go through this BRAS just fine,
>> no packet loss at all.
>
> Running two copies of tcpdump for igb0 and igb1 simultaneously,
> I see that fragments of the same ICMP echo-reply packet encapsulated within PPPoE
> frame always go out through different ports of lagg1. Even when they arrive to client in order,
> it seems this depends of switching network in between PPPoE server and client.
>

If you are running a recent HEAD then you can try setting
net.link.lagg.0.use_flowid to zero.


Andrew