[LARTC] prio not seeming to work

[LARTC] prio not seeming to work

[Bob Puff]

Hello,

I am trying to mess with a prio type qdisc, and must be missing something. 
Here's my sample code:

tc qdisc add dev eth0 root handle 1: prio
tc filter add dev eth0 parent 1:0 prio 1 protocol ip u32 \
  match ip dst 208.0.0.0/8 flowid 1:1
tc filter add dev eth0 parent 1:0 prio 3 protocol ip u32 \
  match ip dst 0.0.0.0/0 flowid 1:3

I would assume that any traffic going to 208.x.x.x should be getting priority
over all other traffic.  But when I set up two simultaneous FTP uploads, one
to a server in the 208.x.x.x block and one to another not in that block, both
end up at the same transfer rate.. This is going into an ADSL line.

What am I missing?

Bob
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RE: [LARTC] prio not seeming to work

[Flechsenhaar, Jon J]

Two questions

1.)  When you type tc class ls dev ethx
	- Do you see that both ftp streams are flowing into their proper
class; 1:1, 1:3?

2.)  Are you sending enough traffic to reach the point of congestion on
you link? 
	- If your not then it will service all the traffic at the same
rate.   


Jon Flechsenhaar
Boeing WNW Team
Network Services
(714)-762-1231
202-E7

-----Original Message-----
From: Bob Puff [mailto:bob@nleaudio.com] 
Sent: Sunday, February 18, 2007 3:32 PM
To: lartc@mailman.ds9a.nl
Subject: [LARTC] prio not seeming to work

Hello,

I am trying to mess with a prio type qdisc, and must be missing
something. 
Here's my sample code:

tc qdisc add dev eth0 root handle 1: prio tc filter add dev eth0 parent
1:0 prio 1 protocol ip u32 \
  match ip dst 208.0.0.0/8 flowid 1:1
tc filter add dev eth0 parent 1:0 prio 3 protocol ip u32 \
  match ip dst 0.0.0.0/0 flowid 1:3

I would assume that any traffic going to 208.x.x.x should be getting
priority over all other traffic.  But when I set up two simultaneous FTP
uploads, one to a server in the 208.x.x.x block and one to another not
in that block, both end up at the same transfer rate.. This is going
into an ADSL line.

What am I missing?

Bob
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Re: [LARTC] prio not seeming to work

[Bob Puff@NLE]

Flechsenhaar, Jon J wrote:

> Two questions
> 
> 1.)  When you type tc class ls dev ethx
> 	- Do you see that both ftp streams are flowing into their proper
> class; 1:1, 1:3?
> 
> 2.)  Are you sending enough traffic to reach the point of congestion on
> you link? 
> 	- If your not then it will service all the traffic at the same
> rate.   

Hi John,

1. Hmm, I guess not:

[root@bob ~]# tc class ls dev eth0
class prio 1:1 parent 1:
class prio 1:2 parent 1:
class prio 1:3 parent 1:

Am I missing something in my short & sweet little script?  Again, it is:

tc qdisc add dev eth0 root handle 1: prio
tc filter add dev eth0 parent 1:0 prio 1 protocol ip u32 \
  match ip dst 208.0.0.0/8 flowid 1:1
tc filter add dev eth0 parent 1:0 prio 3 protocol ip u32 \
  match ip dst 0.0.0.0/0 flowid 1:3

2. I'm definitely saturating my 384k upstream.

Bob



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RE: [LARTC] prio not seeming to work

[Flechsenhaar, Jon J]

Bob,

Sorry, actually you need this command tc -s -d class ls dev ethx.  Just
so you know you can sub "class" out with "qdisc" or "filter".  This will
show stats in detail.  Ex. Packets flowing through your queue.  

 Do you have a priority assigned to the class also?  I see one filter
has a higher priority so it should get more packets than the other;
which I know is what your trying to do.  


Jon Flechsenhaar
Boeing WNW Team
Network Services
(714)-762-1231
202-E7

-----Original Message-----
From: Bob Puff@NLE [mailto:bob@nleaudio.com] 
Sent: Monday, February 19, 2007 9:58 AM
To: Flechsenhaar, Jon J
Cc: lartc@mailman.ds9a.nl
Subject: Re: [LARTC] prio not seeming to work



Flechsenhaar, Jon J wrote:

> Two questions
> 
> 1.)  When you type tc class ls dev ethx
> 	- Do you see that both ftp streams are flowing into their proper

> class; 1:1, 1:3?
> 
> 2.)  Are you sending enough traffic to reach the point of congestion 
> on you link?
> 	- If your not then it will service all the traffic at the same
> rate.   

Hi John,

1. Hmm, I guess not:

[root@bob ~]# tc class ls dev eth0
class prio 1:1 parent 1:
class prio 1:2 parent 1:
class prio 1:3 parent 1:

Am I missing something in my short & sweet little script?  Again, it is:

tc qdisc add dev eth0 root handle 1: prio tc filter add dev eth0 parent
1:0 prio 1 protocol ip u32 \
  match ip dst 208.0.0.0/8 flowid 1:1
tc filter add dev eth0 parent 1:0 prio 3 protocol ip u32 \
  match ip dst 0.0.0.0/0 flowid 1:3

2. I'm definitely saturating my 384k upstream.

Bob



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