Nexus-3548 Switch Performance Validation

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Switch Performance
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    © 2012 Spirent | Cisco. All rights reserved. Page 1 Cisco Nexus 3548 Switch Performance Validation September 2012    © 2012 Spirent | Cisco. All rights reserved. Page 2 Contents Executive Summary .................................................................................................................................... 3   Test Bed ....................................................................................................................................................... 4   How Testing Was Performed ..................................................................................................................... 4   Test Results ................................................................................................................................................. 6   RFC 2544: Unicast Latency, Throughput, and Jitter ................................................................................ 6   RFC 2544: Unicast Latency, Throughput, and Jitter with ACL ............................................................... 11   RFC 2544: Unicast Latency, Throughput, and Jitter with NAT ............................................................... 13   RFC 3918: Multicast Latency, Throughput, and Jitter ............................................................................ 15   Warp SPAN Latency ............................................................................................................................... 19   Conclusion ................................................................................................................................................. 19   About Cisco ............................................................................................................................................... 20   About Spirent ............................................................................................................................................ 20      © 2012 Spirent | Cisco. All rights reserved. Page 3 Executive Summary Cisco, in partnership with Spirent, conducted performance benchmark tests for the Cisco Nexus ®  3548 Switch in the Spirent Proof of Concept (SPOC) Lab. The testing focused on evaluating the switch performance with various traffic profiles and Cisco ®  NX-OS Software features up to and including the most stressful testing conditions. The Cisco Nexus 3548 is an ultra-low-latency, high-density, high-performance switch. It provides 48 front panel ports supporting 100 Megabit Ethernet 1  and 1, 10, and 40 Gigabit Ethernet 1  in a one-rack-unit (1RU) form factor. Using cut-through technology, the Cisco Nexus 3548 can forward a packet through the switch in as little as 170 nanoseconds (ns). To fully validate the Cisco Nexus 3548, rigorous testing needed to be performed. IETF RFC 2544 2  and 3918 3  are widely accepted in the industry as standard benchmarking methodologies to evaluate switch performance by measuring throughput, packet forwarding rate, forwarding latency, and jitter at various conditions. Spirent TestCenter has built-in RFC 2544 and 3918 test suites, which were used during the tests. In addition to standard RFC testing with a basic switch configuration, switch performance was tested when with access control lists (ACLs) and Network Address Translation (NAT) enabled on all interfaces, to evaluate whether those critical features have any impact on switch performance. During the lab testing, the Cisco Nexus 3548 forwarded traffic in less than 250 ns with 100 percent throughput in a full mesh, full-load traffic profile with NAT and ACL enabled. Under most of the common network and traffic configurations, the Cisco Nexus 3548 forwards the packet in less than 200 ns. Highlights of the Cisco Nexus 3548 performance test results include:    100 percent throughput without a single packet drop    Switch latency of less than 200 ns under most common network and traffic configurations    Identical latency characteristics for Layer 2 and 3 traffic    Ultra low and consistent jitter under the most stressful test configuration (less than 8 ns)    No performance impact when ACL and NAT are enabled on all interfaces Spirent configured an d validated Spirent TestCenter’s configurations. Cisco provided the switch configuration through the standard Cisco NX-OS command-line interface (CLI) during the tests. All test results are based on those validated configurations. 1  100M and 40G will be supported after FCS 2  IETF Network Working Group: Benchmarking Methodology for Network Interconnect Devices. 3  IETF Network Working Group: Methodology for IP Multicast Benchmarking.    © 2012 Spirent | Cisco. All rights reserved. Page 4 Test Bed Figure 1 provides an overview of the test bed. Figure 1: Test Bed How Testing Was Performed The test topology and test bed includes a Cisco Nexus 3548 Switch, a Spirent TestCenter 11U with forty-eight 10 Gigabit Ethernet ports, and a control and management server on an out-of-band network. Table 1 shows the hardware and software matrix for the test configuration. Table 1: Test Configuration Hardware and Software Matrix Device Software Notes One Cisco Nexus 3548 Switch with 48 x 10 Gigabit Ethernet interfaces Cisco NX-OS 5.0(3)A1(1) (prerelease) 100 Megabit Ethernet and 40 Gigabit Ethernet interfaces are not supported at first customer shipment (FCS)  One Spirent TestCenter 11U chassis Spirent Test Center Application 4.10 - Six Spirent HyperMetrics CV test modules, each with 8 x 10 Gigabit Ethernet interfaces Spirent Test Center Application 4.10 Total of 48 10 Gigabit Ethernet ports  48 x 1M Passive Twinax cables - - The Cisco Nexus 3548 Switch’s 48 ports are all connected to Spirent TestCenter HyperMetrics CV 10 Gigabit Ethernet test modules through a 1-meter 10GBASE-CU Enhanced Small Form-Factor Pluggable (SFP+) Twinax cable. The built-in RFC benchmark test suites from Spirent TestCenter Application Version 4.10 are used to validate the performance of the Cisco Nexus 3548. First, the Cisco Nexus 3548 and Spirent TestCenter are configured to run RFC 2544 test suites to measure switch performance for unicast traffic, including throughput, latency, and jitter, for both Layer 2 and Layer 3 traffic. Next, multicast performance is measured with RFC 3918 for both Layer 2 and Layer 3 traffic. Again, the throughput, latency, and jitter are all measured on each test.
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