Testing 100G Xena Networks, May 2012

Transcription

1 Testing 100G

2 Who works with 100G Ethernet? What is it used for? How to test it?

3 What is driving 100G Ethernet? Explosive traffic demand pushing existing networks Mobile broadband data and video Ethernet wholesale and mobile backhaul services Cloud services and cloud-based applications Simplify networks Already, many are using n x 10GE links to interconnect sites Operate fewer, higher-capacity links, overcome link aggregation limitations, simplify routing, simplify MPLS Looking to take better advantage of statistical ti ti multiplexing l i Ride down the Ethernet cost curve With Ethernet everywhere 100GE solutions will become affordable enough to be deployed to control network costs

4 100G Ethernet adoption Infrastructure components Multiple suppliers shipping 100GE optical modules Component companies shipping FPGA s, ASICs, NPUs A dozen equipment vendors shipping platforms with 100GE Test solutions are available for 100GE Layer 1-3 testing Operators and service providers First strategic adoptions by the end of 2012 Significant adoption of 100GE by end of 2013 Datacenters Intel Romley server 10GE "LAN-on-Motherboard Motherboard, and PCI Express Gen 2/3 to drive growth in top-of-rack 40GE interconnect

5 100G Ethernet Testing Status Layer 2/3 High port density testbeds Automated production testing for 100GE Switching and routing performance QoS and stream integrity Industry benchmarks (RFC2544, RFC2889) Telecom PoC aggregation links, and WDM Forwarding and Throughput Capacity Layer 1 PCS layer Packet Integrity Optical transceiver and cable bit-error ratio

6 100G Optical Family 100 and 40G optical 100G SR10 100G LR4, ER4 100G migrating to 100m MMF (OM3/4) 10, 40 km SMF smaller form factors CXP, CFP CFP CFP Current 100G LR4 cost too high 10x10 CFP, lower cost (Santur, Google, Brocade, JSDU) New CMOS-based 100G LR4 Gearbox devices will reach market in 2012, reducing power and cost 100G 10x10 10 km SMF CFP CXP CFP CFP CXP2 (2013) CFP2 (2013) QSFP2 (2014) 40G SR4 100m MMF (OM3/4) QSFP+, CFP QSFP+ CFP CFP CFP 40G LR4, ER4 10, 40 km SMF CFP? QSFP+

7 CFP-based Test Equipment All 10/40/100G optical interfaces available in CFP 10G LR/SR, 40G LR4/SR4, 100G LR4/SR10 Natively or via CFP adapter CFP adapters (QSFP+, CXP, SFP+) CFP <-> QSFP+ CFP <-> CXP CFP <-> 4 x SFP+ (Cisco FOURX ) Forward compatible Future CFP2, QSFP2, CXF2 is optical and host compatible with existing CFP optics Xena 40/100G tester compatible with 10GE The only Tri-Speed: 8 x 10G, 2 x 40G, or 1 x 100G

8 New 100/40G PCS and PMA architecture PCS and PMA architecture CAUI, 100G, 20 x 5 Gbps lanes XLAUI, 40G, 4 x 10 Gbps lanes CAUI 100G LR4 PCS/PMA architecture PCS Lanes 20 x 5 Gbps CAUI Interface 10 x Gbps SerDes 4 x 25 Gbps 4 x λ SMF λ0 PCS PMA 20: PMA 10:4 Gearbox λ1 λ2 λ3 0 1 PMD 2 3 λ λ2 λ1 λ3

9 Physical Layer Testing (PMA) Increased complexity of 100G optics Testing and screening during development and production Careful inspection and cleaning of connectors Use an unframed PRBS per lane to determine if your 100/40 Gbps optical transceivers function correctly. How To: 1. Insert the transceiver optics into the Xena tester and an optical loopback cable in the CFP module. 2. Then enable PRBS for all lanes, and run the test for 24 hours minimum to verify no PRBS errors are detected. The loopback cable must be clean and able to pass error-free traffic on any other known good transceiver.

10 Physical Layer Testing (PMA) CAUI/XLAUI SerDes characterization Access to electrical CAUI SerDes allows for accurate host PCB characterization ti during R&D Tune host board voltage swing and pre-emphasis settings

11 λ0 λ0 λ2 λ0 λ0 λ2 λ0 Physical Layer Testing (PCS) Lane skew Skew is an issue for any parallel high-speed bus Validate per lane buffer and alignment using skew insertion Skew tolerances specified by IEEE 802.3ba PCS Rx PCS PMA 20: SP6 0 1 PMA 10:4 SP Gearbo. x 2 PMD SP4 3 λ0 Skew point SP1 SP2 SP3 SP4 Maximum Skew at 100GBASE-R 29 ns (150 UI) 43 ns (222 UI) 54 ns (278 UI) 134 ns (691 UI) 19 Tx PCS 9 SP1 SP2 SP3 SP5 SP6 At Rx PCS 145 ns (748 UI) 160 ns (824 UI) 180 ns (928 UI) Note that for 40GBASE-R, 1 UI is equal to 97 ps at PCS lane signaling g rate of Gbps Note that for 100GBASE-R, 1 UI is equal to 194 ps at PCS lane signaling rate of Gbps

12 Physical Layer Testing (PCS) Lane skew Lane skewing errors can lead to interface link-down problems that t are difficult to debug in deployed d systems. How to: 1. Insert 10 UI (bits) skew on multiple lanes and verify that the PCS markers remain aligned. 2. Then, increase the skew incrementally until lane alignment lock is lost to find the maximum skew for the DUT. IEEE 802.3ba requires a skew tolerance of 928 UI at the Rx PCS

13 Physical Layer Testing (PCS) Lane swapping Lane swapping errors can lead to interface link-down problems that t are difficult to debug in deployed d systems. How to: 1. Configure tester to transmit L2/3 traffic from the tester across the DUT and back to the same tester port. 2. Then, verify that header lock and alignment lock works on all Rx lanes, to check all lanes are recognized and are aligned. 3. Then swap lanes randomly and verify the new Rx lane mapping and that L2/3 traffic is passing error free

14 RFC 2544 benchmarking RFC PURPOSE Verifies forwarding performance, including throughput h t (performance availability), back-to-back b k (link burstability), latency (transmission delay) and frame loss (service integrity) measurements. Xena testers can perform RFC 2544 for 100G and 40G Ethernet interfaces at all frame sizes and at fullline rate. BENEFIT Helps vendors and service providers certify that the link is efficient and error-free at 100% utilization at Layer 2 (VLAN) or layer 3 (IP).

15 RFC 2889 benchmarking RFC PURPOSE For testing 40G and 100G datacenter switches Mesh testing of large-scale switches, and multicast-only throughput test cases where latency and throughput are key performance parameters Xena testers t can perform RFC 2889 for 100G and 40G Ethernet interfaces at all frame sizes and at full-line rate. BENEFIT Helps data centers verify the switch can meet stringent demand for low-latency and lossless throughput performance

16 Automation environments for quality Automated test environments for production Multirate test equipment for testing multirate data center switches, and telecom equipment Broadcom 40/100G switch silicon is multirate 10/40/100G enabled Ideal having a single unified testbedtb for production testingti of both 10, 40, and 100 Gbps modes of operation Command line TCP/IP based scripting from any client environment (Tcl, Java, Perl, Python, VBA) Cisco Catalyst 6500, 4 x 40G, or 16 x 10G

17 CASE STUDY - Cabling Manufactures Furukawa Industrial - Japan Tested OM4 MMF channel links over distances from 70 to 520 meters by simulating a real network. (The standard defines 150m with OM4 MMF Cables.) XenaCompact 100G MMF a b c Optical MPO to MPO cables 12 Fibers MMF OM4 Reichle & De-Massari (R&M) Switzerland Lossless transmission over 550 meters of fiber optic cable and nine MPO connectors / 6-hour demonstration with no bit errors

18 CASE STUDY Global ISP London New York Infinera DTN Infinera DTN Brocade Router 10x 10G connections 10x 10G connections Brocade Router Tier 1 ISP Global IP Network Xena 100G Tester Xena 100G Tester

19 Selecting a 40/100G test platform (1/2) High port density for 40 GE and 100 GE testing 6 x 100GE, 12 x 40GE, or 48 x 10G in 4U chassis Industry s only 1U rackmount 1 x 100G / 2 x 40G / 8 x 10G Industry yp price/performance leader for 100/40G testing Comprehensive testing of the physical coding sublayer Checks compliance to IEEE-STD 802.3ba Unframed layer 1 BERT per PCS lane, for testing both MMF and SMF optics. Software selectable 8 x 10 GE, 2 x 40 GE or 1 x 100GE Industry s only 10G compatible 100G Tester

20 Selecting a 40/100G test platform (2/2) Layer 1-3 testing with wire rate traffic generation Wire-speed stream based traffic generation and statistics Traffic filter statistics, histograms Jumbo frame support (9200B) Analyzes full wire rate 40 / 100 GE traffic Real-time latency, Packet loss, Data integrity, Packet capture Packet capture with Wireshark support Scripting by TCP/IP socket Command Line Interface From any TCP/IP environment, no drivers or APIs needed Same CLI spec for any port speed (10M 100G) Industry benchmark tests RFC2544, RFC2889 Y.1564 test suite to be released soon

21 Corporate Profile Founded 2007 by group of communications professionals Corporate HQ in Copenhagen (Denmark), Boston (US) Self-funded funded through organic growth Winner of global awards for price-performance p leadership incl. Frost & Sullivan and Red Herring

22 Thank You! QUESTIONS? Jacob Nielsen (CEO, Xena Networks)