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OpenFlow Controllers

OpenFlow Controllers. Marcelo Pinheiro September 23rd, 2011. Agenda. OpenFlow Components OpenFlow Controllers OpenFlow software switch Options. OpenFlow Components. Reference : http://www.openflow.org/wp/openflow-components/. OpenFlow Controllers. * Based on Beacon

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OpenFlow Controllers

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  1. OpenFlowControllers Marcelo Pinheiro September 23rd, 2011

  2. Agenda • OpenFlowComponents • OpenFlowControllers • OpenFlow software switch Options

  3. OpenFlowComponents Reference: http://www.openflow.org/wp/openflow-components/

  4. OpenFlowControllers • * BasedonBeacon • ** Basedon NOX 0.4 • AllcontrollerssupportOpenFlow 1.0

  5. OpenFlowControllers Performance TEST SETUP – May 17th, 2011 • CPU: 1 x Intel Core i7 930 @ 3.33ghz, 4 physical cores, 8 threads • RAM: 9GB • OS: Ubuntu 10.04.1 LTS x86_64 • Kernel: 2.6.32-24-generic #43-Ubuntu SMP ThuSep 16 14:58:24 UTC 2010 x86_64 GNU/Linux • BoostLibrary: v1.42 (libboost-all-dev) • malloc: Google'sThread-CachingMalloc version 0.98-1 • Java: Sun Java 1.6.0_25 • Test methodology • cbenchis run locally via loopback, the 4th thread's performance is slightly impacted • cbench emulates 32 switches, sending packet-ins from 1 million source MACs per switch • 10 loops of 10 seconds each are run 3 times and averaged per thread/switch combination • tcmalloc loaded first export LD_PRELOAD=/usr/lib/libtcmalloc_minimal.so.0 • Launched with taskset -c 7 ./cbench -c localhost -p 6633 -m 10000 -l 10 -s 32 -M 1000000 -t

  6. OpenFlowControllers Performance

  7. OpenFlowControllers Performance TEST SETUP – May 1st, 2011 • Machines: 2 x Dell PowerEdge 2950 (1 for controller, 1 for benchmarkerandpacketcapturing)CPU: 2 x Intel(R) Xeon(R) CPU E5405 (4 Cores, 12M Cache, 2.00 GHz, 1333 MHz FSB) • RAM: 4GB • Network: 2 x Gigabitports (tg3 driver) • Buffer sizes: TODO • TCP setting: • OS: DebianSqueeze 32-bit • Kernel: 2.6.32-5-686-bigmem • BoostLibrary: v1.42 (libboost-all-dev) • malloc: Google'sThread-CachingMalloc (libgoogle-perftools-dev) • Java: Sun Java 1.6.0_24 (sun-java6-jdk) • Connectivity: machines are connected via 2 directly attached gigabit links. Directly connected interfaces have IP addresses in the same broadcast domain. The second connection is used to run a second instance of the benchmarker software in case more bandwidth is needed for the test.

  8. OpenFlowControllers Performance • Controller configuration: • nox: must be configured with "--enable-ndebug" passed to the configure script. • nox_d: must be configured with "--enable-ndebug --with-python=no" passed to the configure script. • beacon: see beacon.ini • maestro: see conf/openflow.conf • Control application used: Layer-2 learning switch application. The switch application is a good representative of the controller flow handling performance with tunable read/write ratio (number of unique MAC addresses). • Running controllers: Turn off debugging and verbose output. • nox: ./nox_core -i ptcp:6633 switch • nox_d: ./nox_core -i ptcp:6633 switch -t $NTHREADS • beacon: ./beacon • maestro: ./runbackground.pl conf/openflow.conf conf/learningswitch.dag • Setting CPU affinity for controllers: The following script binds the running threads of a controller to different CPUs (on an 8-core system). Just replace $CTRLNAME with a unique part of controller's binary name (e.g., nox for nox and nox_d). (maestro's runbackground already sets cpu affinity). • Running the benchmarker: • Get the latest version of oflops and compile it. • Run with cbench -c $ctrladdr -p $port -s $nswitch -m $duration -l $loop -t where $ctrladdr and $port are controller IP address and port number respectively, $nswitch is the number of emulated switches, $duration is the duration of test, and $loop is the number of times to repeat the test. The -t option is for running the throughput test: omit it for the latency test.

  9. OpenFlowControllers Performance

  10. OpenFlow software switch Options • Reference Linux Switch: This implementation runs on the widest variety of systems and is easy to port. It is also the slowest, as it cannot take advantage of multiple CPUs and requires kernel-to-user-space transitions. It supports as many ports as you can fit in a PC (8+), including wired and wireless ports. Select platform for further instructions: • NetFPGA Switch: This switch offers line-rate performance for 4 Gigabit ports, regardless of packet size, via hardware acceleration. It requires the purchase of a NetFPGA card, which is $500 for researchers and $1000 for industry. More NetFPGA details are available at www.netfpga.org. • Open vSwitch: Open vSwitch is a multilayer virtual switch, licensed under the open source Apache 2 license, with OpenFlow support. Open vSwitch currently supports multiple virtualization technologies including Xen/XenServer, KVM, and VirtualBox. • OpenWRT: By porting OpenFlow support to OpenWrt, we convert a cheap commercial wireless router and access point into an OpenFlow-enabled switch with a WebUI and a CLI. • NetMagic – The platform is designed with a novel patented architecture, where a common high-density Field Programmable Gate Array (FPGA) device with a combination of commodity Ethernet switching chip can provide the both the high-speed Gigabit Ethernet switching capacity and reconfigurable user-defined packet handling function.

  11. NetMagic x NetFPGA

  12. Expedient

  13. References • OpenFlow – http://www.openflow.org/ • NOX - http://noxrepo.org/wp/ • Beacon - https://openflow.stanford.edu/display/Beacon/Home • Maestro - http://code.google.com/p/maestro-platform/ • Trema - http://trema.github.com/trema/ • SNAC - http://www.openflow.org/wp/snac/ • Big Switch – http://www.bigswitch.com/ • SNAC - http://snacsource.org • NetMagic – http://www.netmagic.org/

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