[LARTC] about default filter command

[LARTC] about default filter command

[Vincent Dautremont]

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Hi,
here I have another newcomer question :-)
in the section 9.6.1 of this how too
http://tldp.org/HOWTO/Adv-Routing-HOWTO/lartc.qdisc.filters.html
we can read commands about filters :
------------------------------------------

# tc filter add dev eth0 protocol ip parent 10: prio 1 u32 match \
   ip dport 22 0xffff flowid 10:1
# tc filter add dev eth0 protocol ip parent 10: prio 1 u32 match \
   ip sport 80 0xffff flowid 10:1
# tc filter add dev eth0 protocol ip parent 10: prio 2 flowid 10:2
What does this say? It says: attach to eth0, node 10: a priority 1  
u32 filter that matches on IP destination port 22 *exactly* and send  
it to band 10:1. And it then repeats the same for source port 80. The  
last command says that anything unmatched so far should go to band  
10:2, the next-highest priority.

------------------------------------------

i try to do this at home as i want my ssh traffic prioritary to other  
traffic but the problem is with the last command ! it simply don't  
work. The last command that says default trafic goes to prio 2  
doesn't work

# tc filter add dev eth0 protocol ip parent 10: prio 2 flowid 10:2

just give me the error: "Unknown filter flowid, hence option 1:2 is  
unparsable"

So I don't get what do I must do in order to say that the default  
trafic goes on priority 2 of the prio filter

is this how too always valid with the current version of tc ? did i  
do something wrong ?

Thank you for your help.



Vincent.


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Re: [LARTC] about default filter command

[Georgi Alexandrov]

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Vincent Dautremont wrote:
> Hi,
> here I have another newcomer question :-)
> in the section 9.6.1 of this how too 
> http://tldp.org/HOWTO/Adv-Routing-HOWTO/lartc.qdisc.filters.html
> we can read commands about filters :
> ------------------------------------------
> 
> # tc filter add dev eth0 protocol ip parent 10: prio 1 u32 match \ 
>   ip dport 22 0xffff flowid 10:1
> # tc filter add dev eth0 protocol ip parent 10: prio 1 u32 match \
>   ip sport 80 0xffff flowid 10:1
> # tc filter add dev eth0 protocol ip parent 10: prio 2 flowid 10:2
> 
> What does this say? It says: attach to eth0, node 10: a priority 1 u32
> filter that matches on IP destination port 22 *exactly* and send it to
> band 10:1. And it then repeats the same for source port 80. The last
> command says that anything unmatched so far should go to band 10:2, the
> next-highest priority.
> 
> ------------------------------------------
> 
> i try to do this at home as i want my ssh traffic prioritary to other
> traffic but the problem is with the last command ! it simply don't work.
> The last command that says default trafic goes to prio 2 doesn't work
> 
> # tc filter add dev eth0 protocol ip parent 10: prio 2 flowid 10:2
> 
> just give me the error: "Unknown filter flowid, hence option 1:2 is
> unparsable"
> 
> So I don't get what do I must do in order to say that the default trafic
> goes on priority 2 of the prio filter
> 
> is this how too always valid with the current version of tc ? did i do
> something wrong ?
> 
> Thank you for your help.
<snip>

You should have posted *all* your tc rules.

-- 
regards,
Georgi Alexandrov

key server - pgp.mit.edu :: key id - 0x37B4B3EE
Key fingerprint = E429 BF93 FA67 44E9 B7D4  F89E F990 01C1 37B4 B3EE


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Re: [LARTC] about default filter command

[Andy Furniss]

Vincent Dautremont wrote:


> # tc filter add dev eth0 protocol ip parent 10: prio 2 flowid 10:2
> 
> just give me the error: "Unknown filter flowid, hence option 1:2 is 
> unparsable"

I am not sure if that ever worked or not - I use

tc filter add dev eth0 protocol ip parent 10: prio 2 u32 match u32 0 0 
flowid 10:2

which should catch all unclassified ip traffic.

When you put prio on root there is often a further buffer that has to 
fill before anything happens. Also arp goes to 1:2 unless you filter it 
elsewhere.

Andy.


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