Re: tc filter using MASKs in mark

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Thanks Martin.

¿This FLAG is available with 2.6.18 kernel version?

I'm using a distro kernel and is as stable that I don't want to upgrade it.

Thanks again.


El Vie, 24 de Agosto de 2007, 10:51, Martin Milata escribió:
> On Fri, Aug 24, 2007 at 01:11:35AM +0200, ArcosCom Linux User wrote:
>> Hi,
>>    I'm having a problem with filtering marked packet with tc.
>>    I'm trying to run this:
>> /sbin/tc filter add dev imq0 parent 1:0 protocol ip prio 8 handle
>> 0x7/0x000f fw classid 1:8
>> But the response is:
>> Illegal "handle"
>> Typing the handle without masked mark is working, but I have a
>> configuration were I need 2 mark types and I'm using masks:
>>    Multiple outgoing interfaces (using 0xf000 mask to know the ip route
>> filter to allow specific interface for the outcoming traffic).
>>    QoS (using 0x000f) to know the destination class for the flow.
>> Perhaps I have an incorrect syntax typing the masked handle, but I don't
>> find any information about how to type correctly the masked handle with
>> "tc filter" and I'm trying an "ip analogous" syntax.
>> The ip/tc utils versions I'm using are 2.6.20.
>> Anybody could help me with this "syntax problem"?
>> Thanks
> I think the fw classifier does not support masks. However, you can also
> use u32 filter to match marks, and it does support matching with mask.
> AFAIK, the support for matching marks have to be enabled in the kernel.
> And the syntax is like this:
>  tc filter add dev imq0 protocol ip prio 8 parent 1:0 u32 match mark \
>  0x7 0x000f flowid 1:8
> Regards,
>  -MM
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