C-Docs: New structure

Change-Id: I73d107f94b28b138f3350a9e1eedb0555583a9ca
Signed-off-by: Tibor Frank <tifrank@cisco.com>

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+---
+title: "Internet Protocol Security"
+weight: 4
+---
+
+# Internet Protocol Security
+
+VPP Internet Protocol Security (IPsec) performance tests are executed for the
+following crypto plugins:
+
+- `crypto_native`, used for software based crypto leveraging CPU
+  platform optimizations e.g. Intel's AES-NI instruction set.
+- `crypto_ipsecmb`, used for hardware based crypto with Intel QAT PCIe cards.
+
+## IPsec with VPP Native SW Crypto
+
+CSIT implements following IPsec test cases relying on VPP native crypto
+(`crypto_native` plugin):
+
+ **VPP Crypto Engine** | **ESP Encryption** | **ESP Integrity** | **Scale Tested**
+----------------------:|-------------------:|------------------:|-----------------:
+ crypto_native         | AES[128\|256]-GCM  | GCM               | 1 to 60k tunnels
+ crypto_native         | AES128-CBC         | SHA[256\|512]     | 1 to 60k tunnels
+
+VPP IPsec with SW crypto are executed in both tunnel and policy modes,
+with tests running on 3-node testbeds: 3n-icx, 3n-tsh.
+
+## IPsec with Intel QAT HW
+
+CSIT implements following IPsec test cases relying on ipsecmb library
+(`crypto_ipsecmb` plugin) and Intel QAT 8950 (50G HW crypto card):
+
+dpdk_cryptodev
+
+ **VPP Crypto Engine** | **VPP Crypto Workers** | **ESP Encryption** | **ESP Integrity** | **Scale Tested**
+----------------------:|-----------------------:|-------------------:|------------------:|-----------------:
+ crypto_ipsecmb        | sync/all workers       | AES[128\|256]-GCM  | GCM               | 1, 1k tunnels
+ crypto_ipsecmb        | sync/all workers       | AES[128]-CBC       | SHA[256\|512]     | 1, 1k tunnels
+ crypto_ipsecmb        | async/crypto worker    | AES[128\|256]-GCM  | GCM               | 1, 4, 1k tunnels
+ crypto_ipsecmb        | async/crypto worker    | AES[128]-CBC       | SHA[256\|512]     | 1, 4, 1k tunnels
+
+## IPsec with Async Crypto Feature Workers
+
+*TODO Description to be added*
+
+## IPsec Uni-Directional Tests with VPP Native SW Crypto
+
+CSIT implements following IPsec uni-directional test cases relying on VPP native
+crypto (`crypto_native` plugin) in tunnel mode:
+
+ **VPP Crypto Engine** | **ESP Encryption** | **ESP Integrity** | **Scale Tested**
+----------------------:|-------------------:|------------------:|-------------------:
+ crypto_native         | AES[128\|256]-GCM  | GCM               | 4, 1k, 10k tunnels
+ crypto_native         | AES128-CBC         | SHA[512]          | 4, 1k, 10k tunnels
+
+In policy mode:
+
+ **VPP Crypto Engine** | **ESP Encryption** | **ESP Integrity** | **Scale Tested**
+----------------------:|-------------------:|------------------:|------------------:
+ crypto_native         | AES[256]-GCM       | GCM               | 1, 40, 1k tunnels
+
+The tests are running on 2-node testbeds: 2n-tx2. The uni-directional tests
+are partially addressing a weakness in 2-node testbed setups with T-Rex as
+the traffic generator. With just one DUT node, we can either encrypt or decrypt
+traffic in each direction.
+
+The testcases are only doing encryption - packets are encrypted on the DUT and
+then arrive at TG where no additional packet processing is needed (just
+counting packets).
+
+Decryption would require that the traffic generator generated encrypted packets
+which the DUT then would decrypt. However, T-Rex does not have the capability
+to encrypt packets.