[LARTC] tc filter problem

[LARTC] tc filter problem

[jeremy]

Hi,

I'm using a linux 2.4.29 kernel and having trouble getting my filters added. The
script I'm editing I actually use on a different system currently. Is this a
tc/iproute/kernel type incompatibility? Any ideas how to debug it?

Thanks, Jeremy

# create a qdisc on T1 interface
tc qdisc add dev w1g1 root handle 1: htb default 77
OK

# create a master class
tc class add dev w1g1 parent 1: classid 1:1 htb rate 1400kbit
OK

# create a leaf class
tc class add dev w1g1 parent 1:1 classid 1:10 htb rate 175kbit \
     ceil 1400kbit prio 0
OK

# create a SFQ qdisc within our subclass
tc qdisc add dev w1g1 parent 1:10 handle 10: sfq perturb 10
OK

# filter traffic on iptables mark 10
tc filter add dev w1g1 parent 1:0 prio 0 protocol ip handle 10 fw flowid 1:10
Error: RTNETLINK answers: Invalid argument


_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc

Re: [LARTC] tc filter problem

[gypsy]

jeremy@ossnetworks.org wrote:
> 
> Hi,
> 
> I'm using a linux 2.4.29 kernel and having trouble getting my filters added. The
> script I'm editing I actually use on a different system currently. Is this a
> tc/iproute/kernel type incompatibility? Any ideas how to debug it?
> 
> Thanks, Jeremy
> 
> # create a qdisc on T1 interface
> tc qdisc add dev w1g1 root handle 1: htb default 77
> OK
> 
> # create a master class
> tc class add dev w1g1 parent 1: classid 1:1 htb rate 1400kbit
> OK
> 
> # create a leaf class
> tc class add dev w1g1 parent 1:1 classid 1:10 htb rate 175kbit \
>      ceil 1400kbit prio 0
> OK
> 
> # create a SFQ qdisc within our subclass
> tc qdisc add dev w1g1 parent 1:10 handle 10: sfq perturb 10
> OK
> 
> # filter traffic on iptables mark 10
> tc filter add dev w1g1 parent 1:0 prio 0 protocol ip handle 10 fw flowid 1:10
> Error: RTNETLINK answers: Invalid argument

I just ran that script on a 2.4.32 kernel and it does not error.  Be
sure to destruct before running:
tc qdisc del dev w1g1 root

I doubt that the above is everything in your script.  Because there is a
problem with prio 49152 (tc -s filter show dev w1g1), my hunch is that
you will find that "prio 0" is the problem.  Try E.G. "prio 9" for all
your filter lines.

(Rhetorical: What device is w1g1?)
--
gypsy
_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc

Re: [LARTC] tc filter problem

[jeremy]

I found my problem. Turned out I didn't have the QOS fwmark routing flag enabled
in the kernel for that host.

Those RTNETLINK errors are so useless. I wish this was documented in that
section of the LARTC howto. I looked for where to submit that as a suggestion
and just see 20 different authors listed. Documenting the required kernel
settings for match u32, fwmark, etc. where they are each discussed would seem
like a useful thing.

BTW, w1g1 is a sangoma wanpipe T1.

Jeremy

Quoting gypsy <gypsy@iswest.com>:

> jeremy@ossnetworks.org wrote:
> >
> > Hi,
> >
> > I'm using a linux 2.4.29 kernel and having trouble getting my filters
> added. The
> > script I'm editing I actually use on a different system currently. Is this
> a
> > tc/iproute/kernel type incompatibility? Any ideas how to debug it?
> >
> > Thanks, Jeremy
> >
> > # create a qdisc on T1 interface
> > tc qdisc add dev w1g1 root handle 1: htb default 77
> > OK
> >
> > # create a master class
> > tc class add dev w1g1 parent 1: classid 1:1 htb rate 1400kbit
> > OK
> >
> > # create a leaf class
> > tc class add dev w1g1 parent 1:1 classid 1:10 htb rate 175kbit \
> >      ceil 1400kbit prio 0
> > OK
> >
> > # create a SFQ qdisc within our subclass
> > tc qdisc add dev w1g1 parent 1:10 handle 10: sfq perturb 10
> > OK
> >
> > # filter traffic on iptables mark 10
> > tc filter add dev w1g1 parent 1:0 prio 0 protocol ip handle 10 fw flowid
> 1:10
> > Error: RTNETLINK answers: Invalid argument
>
> I just ran that script on a 2.4.32 kernel and it does not error.  Be
> sure to destruct before running:
> tc qdisc del dev w1g1 root
>
> I doubt that the above is everything in your script.  Because there is a
> problem with prio 49152 (tc -s filter show dev w1g1), my hunch is that
> you will find that "prio 0" is the problem.  Try E.G. "prio 9" for all
> your filter lines.
>
> (Rhetorical: What device is w1g1?)
> --
> gypsy
>

_______________________________________________
LARTC mailing list
LARTC@mailman.ds9a.nl
http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc