LARTC - Jul 2006 - How to add multiple filters and netem rules on a single interface?

Hi!

We want to run TCP streams to several port numbers through one interface,
each with a different delay set by Netem.
E.g. TCP streams to port 80 could have 50ms delay, while TCP streams to port
81 could have 100 ms delay and so on.

We have tried to solve this by using a combination of tc filter and netem
rules, but we can''t get it quite right.
We are considering one class per port, each with their own Netem delay and
the following filter:

tc filter add dev eth0 protocol ip parent (?) prio 1 u32 match ip protocol 6
0xff match u16 80 0xffff at 20

Is this possible? If so, how do you create the class hierarchy and how do
you combine each filter with the netem rule?


Thank you very much in advance!

Jon Pedersen


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

Andy Furniss wrote:
> Jon Pedersen wrote:
> 
>> Hi!
>>
>> We want to run TCP streams to several port numbers through one
interface,
>> each with a different delay set by Netem.
>> E.g. TCP streams to port 80 could have 50ms delay, while TCP streams 
>> to port
>> 81 could have 100 ms delay and so on.
>>
>> We have tried to solve this by using a combination of tc filter and
netem
>> rules, but we can''t get it quite right.
>> We are considering one class per port, each with their own Netem delay 
>> and
>> the following filter:
>>
>> tc filter add dev eth0 protocol ip parent (?) prio 1 u32 match ip 
>> protocol 6
>> 0xff match u16 80 0xffff at 20
>>
>> Is this possible? If so, how do you create the class hierarchy and how
do
>> you combine each filter with the netem rule?
> 
> 
> I''ve only used netem for simple stuff so am not sure if
it''s possible
> this way or not.
> 
> Another way to try would be to use multiple ifbs and filter the 
> different traffic to those.
> 
> Andy.
> 
> 
> 
> 
>