[LARTC] Please Help: Can't access bands > 10 on prio qdisc

[Andy Furniss]

Gabriel Somlo wrote:
> Hi,
> 
> I'm trying to set up 15 different delay intervals for packets leaving
> on an interface, using netems hanging off of a 16-band prio.
> 
> I'm having trouble adding anything to bands higher than 10. Here's
> what I tried:
> 
>        tc qdisc add dev eth0 root handle 1: prio bands 16 \
>                priomap 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 
> I want all default traffic to go to the highest priority band (0),
> regardless of the TOS bits and whatever. I'll add filters to place
> select packets in lower priority bands (1..15). So far, so good.
> Next:
> 
>        tc qdisc add dev eth0 parent 1:10 handle 100: netem delay 20ms
> 
> This works fine, adding a netem qdisc to band 10. However, when I try
> this:
> 
>        tc qdisc add dev eth0 parent 1:11 handle 110: netem delay 30ms
> 
> I get an error:
> 
>        RTNETLINK answers: Invalid argument
> 
> The "invalid argument" it's bitching about is "parent 1:11". What am I
> doing wrong ? Parents 1:1 through 1:10 work fine, but as soon as I go
> 11 or above, I get this error...
> 
> Thanks for any pointers or ideas,

Try using hex 1:a etc 1:10 would be 16 (assuming the bands is decimal) 
if that doesn't work you could always try multiple ifbs.

Andy.