IPv6 QoS and Traffic Shaping

João Pedro Taveira taveira at rnl.ist.utl.pt
Fri Aug 29 14:29:23 CEST 2008

Hash: SHA1

Thank you for the quick response.

I've already read about tc filters and 6to4, but I don't use IPv6
tunnels. Fortunately I have native IPv6 to the world but I don't know
how to filter it. That's the reason why I need some help. I suppose that
can be made with u32 match as well, but I thought there was a simpler
way to do it.

João Pedro Taveira

Bernhard Schmidt wrote:
> Hi,
>> I've searched in google for some articles that explains how to implement
>> QoS and Traffic Shaping policies with linux but I can only find
>> information about cisco systems implementations and theoretical
>> informations about mechanisms.
>> How can I apply a simple shaping rule to a IPv6 flow and classify the
>> traffic to achieve QoS in IPv6 like is done with tc tool to IPv4?
>> I just need some hints to get in track to start to understand the
>> similarities and differences between IPv4 and IPv6 QoS/TS mechanisms and
>> settings with GNU tools.
> It's the same, but apparently you cannot use the ip6tables CLASSIFY
> target and probably not fwmark as well, but the u32 match.
> I use the following tc filters to put 6to4 traffic into special queues.
> # 6to4, TCP-ACK (0x10), <= 256 Bytes IPv6 Payload
> /sbin/tc filter add dev eth0 protocol ipv6 parent 1:0 pref 1 u32 match
> ip6 dst 2002::/16 match u32 0x00000600 0xff00ff00 at 4 match u8 0x10
> 0xff at 53 flowid 1:2004
> # 6to4, TCP
> /sbin/tc filter add dev eth0 protocol ipv6 parent 1:0 pref 2 u32 match
> ip6 dst 2002::/16 match ip6 protocol 6 0xff flowid 1:2003
> especially the first one was more trial-and-error though :-\
> Regards,
> Bernhard

- --
João Pedro Taveira
taveira at rnl.ist.utl.pt

Administração de Sistemas da Rede das Novas Licenciaturas
Instituto Superior Técnico

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