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documentation:examples:setting_up_a_vpn_ipsec_gre_etc..._performance_benchmark_lab [2016/11/27 08:34]
documentation:examples:setting_up_a_vpn_ipsec_gre_etc..._performance_benchmark_lab [2019/03/09 03:11] (current)
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 +====== Setting-up a VPN (IPSec, GRE, etc…) performance benchmark lab ======
 +{{description>How to build a VPN (IPSec, GRE, etc…) performance benchmark lab with BSDRP}}
 +
 +===== Global concept =====
 +
 +Benching forwarding performance is not simple, benching VPN (IPsec, GRE, etc…) is lot's more complex.
 +  * Methodology for Benchmarking IPsec Devices: [[https://tools.ietf.org/html/draft-ietf-bmwg-ipsec-meth-03|draft-ietf-bmwg-ipsec-meth-03]].
 +  * [[http://www.mecs-press.org/ijcnis/ijcnis-v4-n9/IJCNIS-V4-N9-1.pdf|Methodology for Benchmarking IPsec Gateways]] (from Department of Telecommunications, Slovak University of Technology) that introduce the concept of equilibrium throughput.
 +  * [[https://www.net.in.tum.de/fileadmin/bibtex/publications/theses/2018-pudelko-vpn-performance.pdf|Performance Analysis of VPN Gateways]] (Linux/DPDK/OpenVPN/WireGuard)
 +
 +Equilibrium throughput is the highest forwarding rate of a device that is the same as offered load.
 +
 +The concept is simple:
 +  * Generating network load using 500 bytes UDP payload datagram (528 bytes IP packet);
 +  * Using a hybrid step/binary search algorithm, it generate multiple load and search for the optimum load (when offered load = forwarded load) in minimum tries.
 +
 +BSDRP includes a [[https://github.com/ocochard/BSDRP/blob/master/BSDRP/Files/usr/local/bin/equilibrium|shell script that use netmap-pkg for measuring the Equilibrium throughput]] that apply this concept:
 +  * Use netmap's pktgen in place of Iperf;
 +  * Generate about 2000 flows (mix of different source & destination IP);
 +  * Allow using 2 modes
 +    * The standard "IPSec Benchmark mode", using 500 bytes UDP payload (by default, but configurable) and using equilibrium throughput unit in Mb/s (Ethernet link-level);
 +    * A specific "Router Benchmark mode", using minimum 16 bytes UDP payload (default but configurable) and using equilibrium throughput unit in Kpp/s;
 +  * Add some fixes to the official hybrid step/binary search algorithm.
 +
 +===== Diagram =====
 +
 +==== Logical ====
 +
 +<code>
 ++-------------------+      +--------------------------------------+           +----------------------+
 +|                        |                                      |                                |
 +| Packet generator  |      |      Device under Test (DUT)                     Device under Test  |
 +|  and receiver          |                                      |            (same as other DUT  |
 +|                        |                                      |            or a more powerful) |
 +|                        |                                      |                                |
 +|    Generating NIC |==>>==| incomming NIC          outgoing NIC  |===IPSec===| incommig NIC         |
 +|                        |                                      |                                |
 +|                        |                                      |                                |
 +|  Receiving NIC    |      |                                      |               outgoing NIC     |
 ++-------------------+      +--------------------------------------+           +----------------------+
 +          ||                                                                           ||
 +   ===========================<<<<<===============================================
 +
 +</code>
 +
 +==== Physical ====
 +
 +For cross-checking the packet counters, it's possible to connect our devices to a non-blocking switch that have its own traffic counters.
 +
 +<code>
 ++---------------------------+    +-------------------+     +-------------------+
 +| Packet generator/receiver |    | Device Under Test |     | Device Under Test |
 ++---------------------------+    +-------------------+     +-------------------+
 +                  |                  |                        |      |
 +                  |                  |                        |      |
 ++-----------------------------------------------------------------------------+
 +|         Non-blocking gigabit/tengigabit Ethernet switch with counters       |
 ++-----------------------------------------------------------------------------+
 +</code>
 +
 +===== Switch configuration =====
 +
 +Same configuration as on [[Setting up a forwarding performance benchmark lab|forwarding performance benchmark lab]]
 +
 +===== Configuring packet generator/receiver and DUT =====
 +
 +A detailed example of configuration can be found on [[IPSec performance lab of an IBM System x3550 M3 with Intel 82580]].
 +
 +We need to measure the performance of "Reference Device" by setting up a bench lab with 2 identical devices as DUT if possible. Or using a powerfull "reference" device if only one DUT is available.
 +
 +If CPU supports [[http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/aes-ipsec-performance-linux-paper.pdf|AES-NI feature]], the [[https://www.freebsd.org/cgi/man.cgi?query=aesni&sektion=4|aesni kernel module]] need to be loaded.
 +
 +===== IPSec bench "Equilibrium throughput" method =====
 +
 +Once lab set, we can use the BSDRP tools "equilibrium" for using a fast method for measuring the "IPsec equilibrium throughput" of the DUT.
 +
 +<code>
 +[root@packet-generator]/# equilibrium
 +Usage: ./equilibrium -d MAC-DEST -t TX-NIC -r RX-NIC [-l LINK-BIT-RATE -p -o TOLERANCE -s UDP-LOAD-SIZE]
 + -d MAC :      Destination MAC of the Device Under Test (DUT)
 + -h :          Display this usage message
 + -l RATE :     Maximum link bit-rate in Mbit/s.
 +                  100 for a 100Mb/s link
 +                 1000 for a 1Gb/s link (default)
 +                10000 for a 10Gb/s link
 +                If option -p, this value is in Kilo packet-per-second
 +                Maximum link packet rate in Kpps (1 frame = 1 packet)
 +                  148 for a 100Mb/s link
 +                 1488 for a Gigabit link (default if -p)
 +                14880 for a 10Gb/s link
 + -p :          Switch into Packet-per-second mode
 +                Input and displayed values unit change from Mb/s to Kpps
 +                Use this option for benching router in place of IPSec gateway
 + -o TOLERANCE: Measure tolerance in %
 +                default value of 0.01 for 0.1%
 + -t TX-NIC :   NIC used for sending load
 + -r RX-NIC :   NIC used for receiving (and measuring) load
 + -s LOAD  :    Size of the UDP load
 +                default: 500 in Mb/s, 18 in pps mode
 +                Minimum load for Ethernet: 18
 +Example: ./equilibrium -d 00:1b:21:d3:8f:3e -t igb2 -r igb3
 +
 +[root@packet-generator]/# equilibrium -d 00:1b:21:d3:8f:3e -t igb2 -r igb3
 +Benchmark tool using equilibrium throughput method
 +- Mode: IPSec gateway benchmark
 +- UDP load = 500B, IP packet size=528B, Ethernet frame size=542B
 +- Link rate = 1000 Mb/s
 +- TOLERANCE = 0.01
 +Iteration 1
 +  - offering load = 500 Mb/s
 +  - STEP = 250 Mb/s
 +  - Measured forwarding rate = 500 Mb/s
 +Iteration 2
 +  - offering load = 750 Mb/s
 +  - STEP = 250 Mb/s
 +  - TREND = increasing
 +  - Measured forwarding rate = 750 Mb/s
 +Iteration 3
 +  - offering load = 1000 Mb/s
 +  - STEP = 250 Mb/s
 +  - TREND = increasing
 +  - Warning: Generated only 957Mb/s in place of 1000Mb/s
 +  - Measured forwarding rate = 871 Mb/s
 +Iteration 4
 +  - offering load = 875 Mb/s
 +  - STEP = 125 Mb/s
 +  - TREND = decreasing
 +  - Measured forwarding rate = 871 Mb/s
 +Iteration 5
 +  - offering load = 813 Mb/s
 +  - STEP = 62 Mb/s
 +  - TREND = decreasing
 +  - Measured forwarding rate = 813 Mb/s
 +Iteration 6
 +  - offering load = 844 Mb/s
 +  - STEP = 31 Mb/s
 +  - TREND = increasing
 +  - Measured forwarding rate = 844 Mb/s
 +Iteration 7
 +  - offering load = 859 Mb/s
 +  - STEP = 15 Mb/s
 +  - TREND = increasing
 +  - Measured forwarding rate = 859 Mb/s
 +Estimated Equilibrium link throughput= 859 Mb/s (maximum value seen: 871 Mb/s)
 +</code>