[LARTC] Problem with tc filter (tc qdisc/class works ok)

[LARTC] Problem with tc filter (tc qdisc/class works ok)

[Praveen Mehrotra]

Hello,

I'm having problem adding filters using tc. I get the
response back RTNETLINK answers-invalis argument.

Though the tc qdisc and tc class commands work fine.
In my kernel config, QoS related parameters are
enabled (CONFIG_NET_SCHED, CONFIG_NET_QOS,
CONFIG_NET_CLS, CONFIG_NET_CLS_U32,
CONFIG_NET_SCH_HTB). Also CONFIG_NETLINK,
CONFIG_RTNETLINK and CONFIG_NETLINK_DEV are set to 'y'



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Re: [LARTC] Problem with tc filter (tc qdisc/class works ok)

[Stef Coene]

On Thursday 09 October 2003 23:58, Praveen Mehrotra wrote:
> Hello,
>
> I'm having problem adding filters using tc. I get the
> response back RTNETLINK answers-invalis argument.
>
> Though the tc qdisc and tc class commands work fine.
> In my kernel config, QoS related parameters are
> enabled (CONFIG_NET_SCHED, CONFIG_NET_QOS,
> CONFIG_NET_CLS, CONFIG_NET_CLS_U32,
> CONFIG_NET_SCH_HTB). Also CONFIG_NETLINK,
> CONFIG_RTNETLINK and CONFIG_NETLINK_DEV are set to 'y'
Can you post your tc commands?

Stef

-- 
stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.openprojects.net

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Re: [LARTC] Problem with tc filter (tc qdisc/class works ok)

[Praveen Mehrotra]

--- Stef Coene <stef.coene@docum.org> wrote:
> On Thursday 09 October 2003 23:58, Praveen Mehrotra
> wrote:
> > Hello,
> >
> > I'm having problem adding filters using tc. I get
> the
> > response back RTNETLINK answers-invalis argument.
> >
> > Though the tc qdisc and tc class commands work
> fine.
> > In my kernel config, QoS related parameters are
> > enabled (CONFIG_NET_SCHED, CONFIG_NET_QOS,
> > CONFIG_NET_CLS, CONFIG_NET_CLS_U32,
> > CONFIG_NET_SCH_HTB). Also CONFIG_NETLINK,
> > CONFIG_RTNETLINK and CONFIG_NETLINK_DEV are set to
> 'y'
> Can you post your tc commands?
> 
> Stef


Hi Stef,

I'm using following commands (i'm trying to use it
with IMQ). I'm trying the example given in IMQ section
of adv-routing-howto doc.

# tc qdisc add dev imq0 root handle 1: htb default 11

# tc class add dev imq0 parent 1: classid 1:1 htb \
rate 4mbit burst 10k 

# tc class add dev imq0 parent 1:1 classid 1:10 \
htb rate 2mbit

# tc class add dev imq0 parent 1:1 classid 1:11 \
htb rate 2mbit 

# tc qdisc add dev imq0 parent 1:10 handle 10 pfifo
#tc qdisc add dev imq0 parent 1:11 handle 11: pfifo

# tc filter add dev imq0 parent 10:0 protocol ip \
prio 1 u32 match u32 00100000 00ff0000 at 0 \
flowid 1:10

All commands except the last one work fine.

Thanks for your help,
Praveen

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Re: [LARTC] Problem with tc filter (tc qdisc/class works ok)

[Stef Coene]

On Friday 10 October 2003 22:06, Praveen Mehrotra wrote:
> # tc filter add dev imq0 parent 10:0 protocol ip \
> prio 1 u32 match u32 00100000 00ff0000 at 0 \
> flowid 1:10
>
> All commands except the last one work fine.
soyou have an error in your filter statement.  I have the same error if I 
execute it on my box.  I'm not familiar with the u32 syntax, but check out 
the docs for examples.  
I think you copied this filter command from the lartc howto, but it's not 
working for me either.

Stef

-- 
stef.coene@docum.org
 "Using Linux as bandwidth manager"
     http://www.docum.org/
     #lartc @ irc.openprojects.net

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Re: [LARTC] Problem with tc filter (tc qdisc/class works ok)

[Thomas Graf]

Hi

> # tc filter add dev imq0 parent 10:0 protocol ip \
> prio 1 u32 match u32 00100000 00ff0000 at 0 \
> flowid 1:10
> 
> All commands except the last one work fine.

I assume you're trying to match the tos field.  u32 uses strtol
to read numeric values. Values prefixed with a 0 are assumed to
be octal you have to write 0x0011... and 0x00ff.... in order
to have it interpreted in hex.

Try this:

tc filter add dev imq parent 10:0 protocol ip \
  prio 1 u32 match ip tos 0x10 0xff flowid 1:10

Regards

-- 
Thomas GRAF <tgraf@suug.ch>
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