Understanding throughput. 

Please enable transcript at this video. 0:00 1/45 Understanding throughput or Common misconceptions on what is 'real' device throughput 0:58 2/45 Objectives 1:40 3/45 What is throughput? 2:25 4/45 Router throughput 2:54 5/45 Maximum router throughput 3:56 6/45 Link or wire speed 4:35 7/45 Wire-speed 5:24 8/45 Wireless "wire speed" (Data rates) 5:52 9/45 802.11ad Data rates 6:16 10/45 Marketing numbers 7:38 11/45 Capacity 8:41 12/45 Ethernet preamble and interframe gap, 20Bytes on every frame 10:11 13/45 Theoretical Layer2 throughput 10:37 14/45 Theoretical Layer2 throughput 10:46 15/45 Layer1 wire-speed vs. Layer2 wire-speed 11:47 16/45 "Real" network speed 12:44 17/45 How does speedtest.net work 14:25 18/45 TCP Theoretical throughput 16:43 19/45 17:35 20/45 19:32 21/45 TCP and multi-threading 21:11 22/45 Single TCP stream and multi-threading 22:00 23/45 Flow/Packet steering 24:12 24/45 RB3011UiAS block diagram 25:01 25/45 What can adn can't we do? 25:44 26/45 Routing forwarding 26:26 27/45 26:36 28/45 27:00 29/45 Initial FastPath inmlementation 27:37 30/45 Routing forwarding FastPath 27:55 31/45 27:59 32/45 FastPath + Conntrack 28:41 33/45 FastPath + Conntrack = FastTrack 29:05 34/45 Routing forwarding FastPath 29:19 35/45 FastTrack-connection 30:00 36/45 Without FastTrack 30:39 37/45 With FastTrack 31:42 38/45 Full queues and multi-core processing 32:59 39/45 Empty queues and multi-core processing 33:47 40/45 Conclusions 34:54 41/45 Testing from router to router 36:38 42/45 Traffic-generator tool 37:48 43/45 Bandwidth-test tool 39:38 44/45 Speed-test tool 40:41 45/45

Great presentation. Thanks Janis

10:30 can someone explain how it is exactly 64 bytes? is it 64 bytes - ethernet overhead = 18 bytes, minus ip+udp header -28 bytes... now we have 64-28-18 = 18 bytes udp-payload data? also, he wrongly calls it layer2 "packet" and not frame? =)

Brilliant

bat wat rili iz de tru put