在 2023/2/28 下午7:16, Michael S. Tsirkin 写道:
On Sat, Feb 18, 2023 at 10:37:15PM +0800, Heng Qi wrote:
If the tunnel is used to encapsulate the packets, the hash calculated
using the outer header of the receive packets is always fixed for the
same flow packets, i.e. they will be steered to the same receive queue.
Wait a second. How is this true? Does not everyone stick the
inner header hash in the outer source port to solve this?
For example geneve spec says:
it is necessary for entropy from encapsulated packets to be
exposed in the tunnel header. The most common technique for this is
to use the UDP source port
same goes for vxlan did not check further.
so what is the problem? and which tunnel types actually suffer from the
problem?
In fact, similar to protocols such as GRE, there is no outer transport
header.
Thanks.
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