Gianfranco Delli Carri wrote:

Greetigs,

seems that in a 2.4.25 kernel, with VLAN configured, if you try tu use CBQ disc on VLAN subIf no more traffic can be passed. (NO ARP, NO IP)

Just after: 
/sbin/tc qdisc add dev eth1.10 root handle 1 cbq bandwidth 100Mbit avpkt 1000 cell 8

traffic was dropped.

Seems that in the same server enviroment the CBQ disc attached to the untagged interface can work without problems.

Please try this patch.

Dave, the txqueuelen=0 fix for pfifo_fast apparently didn't went in
2.4, this is the patch from 2.6, it applies with minor offset.

Best regards
Patrick