qdisc gets used without filters?

[Robert Sander <robert.sander@epigenomics.de>]

Hi!

I just set up this config:

salam:~# tc -s -d  qdisc ls
qdisc pfifo 80b0: dev eth1 limit 16p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80af: dev eth1 limit 15p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80ae: dev eth1 limit 14p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80ad: dev eth1 limit 13p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80ac: dev eth1 limit 12p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80ab: dev eth1 limit 11p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80aa: dev eth1 limit 10p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a9: dev eth1 limit 9p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a8: dev eth1 limit 8p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a7: dev eth1 limit 7p
 Sent 31402 bytes 295 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a6: dev eth1 limit 6p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a5: dev eth1 limit 5p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a4: dev eth1 limit 4p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a3: dev eth1 limit 3p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a2: dev eth1 limit 2p
 Sent 0 bytes 0 pkts (dropped 0, overlimits 0) 

qdisc pfifo 80a1: dev eth1 limit 1p
 Sent 6740 bytes 65 pkts (dropped 0, overlimits 0) 

qdisc prio 1: dev eth1 bands 16 priomap  0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
 Sent 38142 bytes 360 pkts (dropped 0, overlimits 0) 

salam:~# tc filter ls dev eth1
salam:~#

A prio qdisc with 16 bands, each one a pfifo qdisc. Band 1 and 7 get data
without having filters defined. I thought all the packets would go into
one band if there are no filters. And why band 7 and not band 2?

Greetings
-- 
Robert Sander
Computer Scientist                                       Epigenomics AG
Bioinformatics R&D        www.epigenomics.de          Kastanienallee 24
+493024345330                                              10435 Berlin