On Wednesday 04 December 2002 20:01, James Ma wrote:
> Hi, All,
>
> My understanding is u32 filter is very powerful filter and could do
> anything about IP header filtering, then why do we sometimes use
> netfilering in IPtables? One advantege I guess is in netfilering, there is
> usage counter? Are there other advantges using netfilter (such as delay,
> flexibility)? What is the disadvantages to us Netfilter?
>
> In summary, what are the considerations to select u32 or netfilter as
> classifier for QoS?
I'm not sure, but I think matching a u32 filter is based on a tree-like
structure. The fw filter can be faster on the filter part if you use the
mark as minor number. But you still have a lot of iptables rules to test.
And I think you have to test them 1 by 1.
So I think the fw filter will be slower.
Stef
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