Re: [LARTC] need help with tc filters

[Jim Lawson <jim+lartc@jimlawson.org>]

Hi Bob,

Thanks, those filters that you sent do work.  So, any tips?  Is the 
"prio" qdisc superfluous if I am already using htb?  What was it about 
my filters that didn't work?

I will fiddle with this a bit...  this helps a lot.

Jim

Bob Puff@NLE wrote:
> Hi Jim,
>
> Try something a little more simple:
>
> tc qdisc del dev $IF root
> tc qdisc add dev $IF root handle 1: htb default 11
> tc class add dev $IF parent 1: classid 1:1 htb rate 384kbit
> tc class add dev $IF parent 1:1 classid 1:10 htb prio 0 rate 384kbit burst 3k
> tc class add dev $IF parent 1:1 classid 1:11 htb prio 3 rate 384kbit
>
> # "bulk" ssh on port 20022 goes to 1:11: (low priority)
> tc filter add dev $IF parent 1:0 protocol ip prio 1 u32 \
>        match ip sport 20022 0xffff flowid 1:11
>        tc filter add dev $IF parent 1:0 protocol ip prio 1 u32 \
>        match ip dport 20022 0xffff flowid 1:11
>
> # ICMP goes fast:
> tc filter add dev $IF parent 1:0 protocol ip prio 0 u32 \
>        match ip protocol 1 0xff flowid 1:10
>
> Some minor changes in numbers there.  Class 1:10 is fast, 1:11 is bulk.
>
> Bob
>
>
> Jim Lawson wrote:
>
>   
>> Hi,
>>
>> I am attempting to set up some simple outbound shaping following the
>> LARTC HOWTO.
>>
>> The HTB qdisc seems to work as the documentation says, but my filters
>> don't seem to be working.  All of the packets go to the default queue
>> regardless of what filters I set, it seems.  (according to tc -s qdisc
>> show)
>>
>> I am trying to get this working on my openwrt box (whiterussian rc6),
>> but when testing it on my Debian etch box for comparison, I see the same
>> behavior.
>>
>> I'm hoping someone can point out what I'm doing wrong with the filters...
>>
>> FYI: "vlan1" is the outbound interface of my wrt54g.
>>
>> Script follows:
>>
>> IF=vlan1
>>
>> insmod cls_u32
>> insmod sch_htb
>> insmod sch_prio
>> insmod sch_sfq
>>
>> #
>> #  qdisc/class tree
>>
>>
>> #       1:      root (HTB)  qdisc
>> #       |
>> #      1:10     class rate 384000bit
>> #       |
>> #      10:      prio qdisc
>> #    /  |  \
>> #  10:1 |   10:3
>> #  |  10:2    |
>> # 101:  |     |         sfq
>> #      102:   |         sfq
>> #            103:       sfq
>>
>>
>> tc qdisc del dev $IF root
>>
>> tc qdisc add dev $IF root handle 1: htb default 10
>>
>> tc class add dev $IF parent 1: classid 1:10 htb rate 384kbit burst 3k
>>
>> # This automatically creates 10:1, 10:2, 10:3
>> tc qdisc add dev $IF parent 1:10 handle 10: prio
>>
>> # Add sfq qdisc to each of the priority classes
>>
>> tc qdisc add dev $IF parent 10:1 handle 101: sfq
>>
>> tc qdisc add dev $IF parent 10:2 handle 102: sfq
>>
>> tc qdisc add dev $IF parent 10:3 handle 103: sfq
>>
>> # "bulk" ssh on port 20022 goes to 103: (low priority)
>> tc filter add dev $IF parent 1:0 protocol ip prio 1 u32 \
>>        match ip sport 20022 0xffff flowid 103:
>>        tc filter add dev $IF parent 1:0 protocol ip prio 1 u32 \
>>        match ip dport 20022 0xffff flowid 103:
>>
>> # ICMP goes fast?
>>
>> tc filter add dev $IF parent 1:0 protocol ip prio 2 u32 \
>>        match ip protocol 1 0xff flowid 101:
>>
>>
>>
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>>
>>     

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