Hi,
Default assignment algorithm support address per fib (tenant)
https://wiki.fd.io/view/VPP/NAT#NAT44_add_pool_address_for_specific_tenant
It just pick random port (per protocol) from first address with some available
ports. In case of multithread ports a divided between worker threads.
Matus
From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of JB
Sent: Wednesday, February 6, 2019 8:19 AM
To: vpp-dev@lists.fd.io
Subject: Re: [vpp-dev] [NAT] Assign same external IP
Hi Ole!
Thanks for the response!
I've followed the code you mentioned which has lead me to the default address
and port assignment algorithm. I can see how we can easily plug our own, but
I'm trying to first break down the code for the default one in order to
understand how exactly the algorithm works right now. Is the default algorithm
also responsible for the endpoint independent logic?
It's a bit lost on me as to why the default one checks against the fib_index
(the other ones do not).
The second time we check if it's a bitwise all 1 (~0), before then running the
exact same code. Is this a hack for a previous issue?
else if (a->fib_index == ~0)
{
ga = a;
}
Thanks,
John
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