Re: [PATCH ipvs-next] ipvs: add sysctl to ignore tunneled packets

[Alex Gartrell <alexgartrell@xxxxxxxxx>]

On Thu, Sep 10, 2015 at 11:30 AM, Julian Anastasov <ja@xxxxxx> wrote:
>         More details? Do we set the flag for IPIP packets
> and what happens otherwise?

This is for the situation where you are running ipvs on a server that
is also one of the real servers.  What will happen is that you get an
IPIP encapsulated packet sent to you from the other ipvs server,
decapsulate it, and it is caught by ipvs and then forwarded again.

This is always extra work, but in the worst case, you can end up
forwarding it back to the other ipvs server.  For us, this has caused
a lot of ping-ponging which burns up a CPU core.

-- 
Alex Gartrell <agartrell@xxxxxx>
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