Re: [PATCH v2 net-next 0/3] ipv4: Hash-based multipath routing

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On Sat, Aug 29, 2015 at 1:46 PM, David Miller <davem@xxxxxxxxxxxxx> wrote:
> From: Peter Nørlund <pch@xxxxxxxxxxxx>
> Date: Sat, 29 Aug 2015 22:31:15 +0200
>
>> On Sat, 29 Aug 2015 13:14:29 -0700 (PDT)
>> David Miller <davem@xxxxxxxxxxxxx> wrote:
>>
>>> From: pch@xxxxxxxxxxxx
>>> Date: Fri, 28 Aug 2015 22:00:47 +0200
>>>
>>> > When the routing cache was removed in 3.6, the IPv4 multipath
>>> > algorithm changed from more or less being destination-based into
>>> > being quasi-random per-packet scheduling. This increases the risk
>>> > of out-of-order packets and makes it impossible to use multipath
>>> > together with anycast services.
>>>
>>> Don't even try to be fancy.
>>>
>>> Simply kill the round-robin stuff off completely, and make hash based
>>> routing the one and only mode, no special configuration stuff
>>> necessary.
>>
>> I like the sound of that! Just to be clear - are you telling me to
>> stick with L3 and skip the L4 part?
>
> For now it seems best to just do L3 and make ipv4 and ipv6 behave the
> same.

That makes mapping the hash to offload hardware easier also.
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