[LARTC] Cannot get htb & prio working together.

From: Michael Davidson <michael@bbd.co.za>
To: lartc@vger.kernel.org
Subject: [LARTC] Cannot get htb & prio working together.
Date: Thu, 03 Nov 2005 17:52:43 +0000	[thread overview]
Message-ID: <436A4E6B.6090506@bbd.co.za> (raw)

Hi,
    I've failed miserably in my endeavours so far and I'm at the point 
where help would be much appreciated.

I want to have 3 bandwidth limited classes on my  Internet interface. In 
each of those classes  I want  3 prioritization bands, and then  use "tc 
filters" to place the traffic into the correct class and priority. The 
problem is that the traffic doesn't get classified at all,  it just 
seems to go through the root queue untouched.

This is the minimal config I've been testing with:

tc qdisc add dev eth0 root handle 1: htb
tc class add dev eth0 parent 1: classid 1:1 htb rate 120kbit
tc class add dev eth0 parent 1:1 classid 1:20 htb rate 30kbit ceil 120kbit
tc qdisc add dev eth0 parent 1:20 handle 20: prio

#Note: With a "prio" qdisc the class ID's of nn:1 to 3 are automatically 
provided
tc qdisc add dev eth0 parent 20:1 handle 201: sfq
tc qdisc add dev eth0 parent 20:2 handle 202: sfq
tc qdisc add dev eth0 parent 20:3 handle 203: sfq

tc filter add dev eth0 parent 1:0 protocol ip prio 1 u32 match ip dport 
22 0xffff flowid 20:1
tc filter add dev eth0 parent 1:0 protocol ip prio 1 u32 match ip dport 
23 0xffff flowid 20:3

A "tc filter show" displays the filters and so on and one can see the 
hits & successes when testing with, say, Telnet, but the counters on the 
respective queue/flowid don't increment. Only counters on the root queue 
show activity. :-

filter parent 1: protocol ip pref 1 u32 fh 800::801 order 2049 key ht 
800 bkt 0 flowid 20:3  (rule hit 82 success 31)
  match 00000017/0000ffff at 20 (success 31 )

qdisc sfq 201: parent 20:3 limit 128p quantum 1514b flows 128/1024
 Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
 rate 0bit 0pps backlog 0b 0p requeues 0

I've tried changing the filter parent for the "prio" qdisc i.e 20, but a 
"tc filter show"  doesn't even display the filter and as you might 
expect only the root queue counter shows activity.

The os is Fedora Core 4 with an "out the box"  server installation. 
Linux version 2.6.11-1.1369_FC4

Thanks in advance

Mike D.

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