TEST # The Bottom Line. September 2018 REPORT

Transcription

1 TEST REPORT # September 2018 Commissioned by Huawei Technologies Co., Ltd. Huawei WLAN AP2050DN/AP2050DN-E/AP2051DN/AP2051DN-E/ AP4050DN/AP4050DN-E/AP4051DN/AP4151DN/AP4051TN Access Points Feature Validation and Performance Evaluation Executive Summary With the onset of the big data era, Wi-Fi coverage is increasingly demanded by users everywhere. As one of the leading vendors in wireless communications technology, Huawei launched a series of ac Wave 2 wireless access points (APs) and solutions to meet coverage requirements of different markets. Wall Plate Access Points AP2050DN/AP2050DN-E/AP2051DN/AP2051DN/E: Suitable for hotel rooms, student dorms, hospital wards, offices and other small and high density room scenarios. Access Point AP4050DN/AP4050DN-E/AP4051DN/AP4151DN: Suitable for medium and small businesses, airports, bus or train stations, stadiums, cafes, recreation centers, and other. business environment. Three-radio-band access point AP4051TN: Suitable for eclassrooms, conference rooms, and other environment with sudden large burst traffic. Tolly engineers evaluated Huawei access points performance and features in multiple scenarios and compared them with Cisco and Aruba devices. The Bottom Line 1 Huawei AP2050DN, AP2050DN-E, AP2051DN and AP2051DN-E supported 256 concurrent users per AP; Huawei AP4050DN, AP4051DN and AP4151DN supported 512 concurrent users per AP; AP4051TN supported 768 concurrent users per AP 2 Huawei AP4051TN supports three radios. It supported 240 users streaming a 720p HD video without lagging or 250 users browsing web pages simultaneously with smooth response 3 Huawei AP2051DN, AP2051DN-E, AP4050DN, AP4050DN-E, AP4051DN and AP4151DN each supported 120 users streaming a 720p HD video without lagging or 130 users browsing web pages simultaneously with smooth response; Huawei AP2050DN and AP2050DN-E each supported 100 users streaming a 720p HD video without lagging or 110 users browsing web pages simultaneously with smooth response 4 In office scenarios, Huawei AP4050DN, AP4051DN and AP4151DN s load balancing performance, voice call quality, and edge throughput were better than those of Cisco Aironet 1832i and Aruba AP-305 Page 1 of 18

2 Test Results Office Environment Scenario Tests Tolly engineers simulated an office environment scenario in a room 16 meters long and 9.5 meters wide, and verified: load balancing, load balancing after stations (STA) roaming, video playing during movement of STAs, and edge throughput after automatic radio calibration of APs. See Figure 1 for the test environment. Huawei AP4050DN, AP4051DN and AP4151DN as well as Cisco Aironet 1832i and Aruba AP-305 were tested. In each test, Tolly engineers deployed four APs of the same model to cover the entire office environment scenario. Huawei Technologies, Co., Ltd WLAN Access Points Feature Validation and Performance Evaluation Tested August 2018 Office Environment Scenario Test Environment AP4 AP1 AP3 AP2 Note: The gray parts are concrete walls. All APs were installed on the ceiling. In each test, four APs of the same model were deployed to cover the entire office. Source: Tolly, August 2018 Figure 1 Page 2 of 18

3 Multi-User Load Balancing The load balancing feature distributes stations (STAs) as evenly as possible to APs in the same load balancing group. This improves the system capacity and user experience. Tolly engineers placed 40 mobile phones randomly in the central area of the office environment. In each test, four tested APs (of the same model) were added to the same balancing group and configured to use the same SSID. After all the 40 mobile phones were connected to the SSID for 10 minutes, Tolly engineers checked the number of STAs on each AP to evaluate the load balancing capability of each AP. According to test results shown in Table 1, with the dynamic load balancing optimization, STAs were evenly distributed on each Huawei AP. Huawei's load balancing algorithm controlled the number of STAs connected to each AP, prevented a large number of STAs from connecting to a single AP, and could improve the capacity and quality of the entire network. Cisco and Aruba solutions distributed STAs less evenly than the Huawei solution in this test. Multi-user Load Balancing Test Environment 40 Mi 4C Smart Phones Note: 40 Mi 4C smart phones were randomly distributed in the central area. Source: Tolly, August 2018 Figure 2 Multi-user Load Balancing Test Results AP Model Number of STAs on Each AP after Load Balancing AP1 AP2 AP3 AP4 Huawei AP4050DN Cisco Aironet 1832i Aruba AP Note: The Huawei solution uses its dynamic intelligent load balancing mechanism to flexibly optimize load balancing based each AP s load. This test is a load balancing baseline test with all STAs in standby state. Test results shown here are the number of STAs on each AP after they ve been online for 10 minutes. Source: Tolly, August 2018 Table 1 Page 3 of 18

4 Multi-User Load Balancing after STA Roaming In an office scenario with multiple APs deployed, movements of STAs may cause STA roaming. Especially when a conference occurs, a large number of STAs may roam. Tolly engineers evaluated dynamic load balancing optimization of Huawei APs after STA roaming. Tolly engineers moved two mobile phones and verified that they roamed. After 10 minutes, engineers checked the number of STAs on each AP. According to test results shown in Table 2, Huawei APs performed dynamic load balancing optimization so loads were balanced on Huawei APs after STAs roamed. In the same scenario, Aruba did not dynamically adjust load balancing after STA roaming. Multi-user Load Balancing after STA Roaming Test Environment 38 Mi 4C Smart Phones 2 Mi 4C Smart Phones Note: 2 smartphones were moved out of the office and roamed to AP3. Source: Tolly, August 2018 Figure 3 Multi-user Load Balancing after STA Roaming Test Results AP Model Number of STAs on Each AP after Load Balancing AP1 AP2 AP3 AP4 Huawei AP4050DN Cisco Aironet 1832i Aruba AP Note: The Huawei solution uses its dynamic intelligent load balancing mechanism to flexibly optimize load balancing based each AP s load after STA roaming. Test results shown here are the number of STAs on each AP after 10 minutes of STA roaming. Source: Tolly, August 2018 Table 2 Page 4 of 18

5 Video Playing During STA Movement A Tolly engineer played a 720p HD video on a mobile phone through Wi-Fi while walking along the path as shown in Figure 4, and checked whether lagging occurred. When Huawei and Aruba APs were used, the video played smoothly without lagging. However, with Cisco Aironet 1832i, the video lagged in some areas. Video Playing during STA Movement Test Environment 40 Mi 4C Smart Phones 1 iphone 6 Note: Tolly engineer played a 720p HD video on an Apple iphone 6 through Wi-Fi while walking along the path. Source: Tolly, August 2018 Figure 4 Video Playing during STA Movement Test Results AP Model Huawei AP4050DN Huawei AP4051DN Huawei AP4151DN Cisco Aironet 1832i Aruba AP-305 Video Playing Experience during Movement Smooth without lagging Smooth without lagging Smooth without lagging Lagged Smooth without lagging Source: Tolly, August 2018 Table 3 Page 5 of 18

6 Edge Throughput After Automatic Radio Calibration Radio environments are ever changing. Radio calibration of APs allows for automatic monitoring, analysis, and adjustment of radios so that radio resources can be systematically and intelligently managed in real time. In this way, a wireless network can quickly adapt to radio environment changes, enabling the system to maintain the optimal network performance. In the office scenario, Tolly engineers used an Apple MacBook Pro to check the signal strength indicator (RSSI) at multiple points. Edge Throughput Test Environment With the Cisco Aironet 1832i AP, the client s RSSI was less than -65dBm. The signal was much better with the Huawei AP4050DN, AP4051DN and AP4151DN access points. Tolly engineer chose one edge location to evaluate single client performance. See Figure 6 for results. Note: Edge points are between APs. If the automatic calibration effect of APs is poor, signal at edge points will be low or the interference will be strong to affect client performance. Source: Tolly, August 2018 Figure 5 Throughput (Mbps) Edge Throughput Test Results (as reported by Ixia IxChariot) Huawei AP4050DN Huawei AP4051DN Huawei AP4151DN Cisco Aironet 1832i Aruba AP TCP UDP Note: One Apple MacBook Pro was used as the STA with 5GHz connection, HT80 (80MHz bandwidth) and downstream test traffic. Source: Tolly, August 2018 Figure 6 Page 6 of 18

7 Access Restriction of Weak-signal STAs When a large number of STAs are connected to one AP channel, STAs share the air time of that AP channel. As a result, the network access quality of each STA drops. Weak-signal STAs may occupy the channel for a longer time to ensure their network access quality. As a result, network access of other STAs on the AP will be affected. To ensure network experience of online STAs, Huawei AP4050DN, AP4051DN and AP4151DN can deny access of weak-signal STAs. In Figure 7, the RSSI at the red point was about -85 dbm. Huawei AP4050DN, AP4051DN and AP4151DN were configured to deny access of STAs whose RSSIs were lower than 65 dbm. The RSSI Low Check feature was enabled on Cisco Aironet 1832i and the RSSI threshold was set to 65 dbm. The test result shows that the STA could not connect to Huawei APs, which means that Huawei APs could deny access of weaksignal STAs. The STA could still connect to the Cisco AP, which means that Cisco Aironet 1832i could not deny access of weak-signal STAs. Access Restriction of Weak-signal STA Test Environment Note: One Apple MacBook Pro had RSSI as -85dBm at the test location. Engineers tried to use it to connect to the SSID under test. Source: Tolly, August 2018 Figure 7 Page 7 of 18

8 Voice Call Quality According to Huawei's description, Huawei adopts an application protocol identification and classification engine. This engine uses application awareness technology to identify packets of protocols (such as HTTP and RTP) by checking Layer 4 to Layer 7 information in the packets. This engine can significantly improve voice call quality of common voice services in the industry that use SIP and RTP and applications such as Skype for Business, QQ, and WeChat. Huawei supports QoS on the Access Controller (AC) and the Access Point (AP) while Cisco Aironet 1832i only supports QoS on the controller. In the test, Huawei and Aruba used the QoS function on the AP in the direct forwarding mode while Cisco used the QoS function on the controller in the tunnel forwarding mode. Test results showed that with background traffic, Huawei AP s voice quality was better than Cisco and Aruba s. Voice Call Quality Test Environment A VoIP call was established between each pair of phones AP under test Source: Tolly, August 2018 Figure 8 Voice Call Quality Test Results MOS (Higher is better) Huawei AP4050DN Huawei AP4051DN Huawei AP4151DN Cisco 1832i Aruba AP305 Note: 1. MOS (Mean Opinion Score) is an important metric to judge voice quality. MOS score of an acceptable VoIP call is generally between 3.5 and 4.2 (higher is better). 2. Test was run with the 5GHz band, HT20 mode, channel 149 on 20 Mi Note smart phones. Every two phones had one VoIP call session. One laptop was used to generate 50Mbps TCP background traffic via the AP under test. Engineers used the espace VoIP call monitoring tool on each phone to record the last 15 MOS values (more than 1 minute duration) and averaged them. Source: Tolly, August 2018 Figure Page 8 of 18

9 Standalone AP Tests This test involves the following Huawei AP models: 2x2 MIMO and 2 spatial streams wall plate AP: AP2050DN/AP2050DN-E; 2x2 MIMO and 2 spatial streams wall plate AP with smart antennas: AP2051DN/ AP2051DN-E; 2x2 MIMO and 2 spatial streams standard AP: AP4050DN/AP4050DN-E/AP4051DN/ AP4151DN. Test cases include the maximum number of STAs supported on a single AP, single-client performance, MU-MIMO performance, high-density video streaming, application recognition, non-wi-fi interference detection, traditional and cloud mode switching, Access Controller (AC) hot standby (HSB), dual PoE power supplies, smart antennas, 200m long distance PoE power, bluetooth positioning and Internet of Things (IoT) applications. User Capacity Huawei AP2050DN, AP2050DN-E, AP2051DN and AP2051DN-E supported 128 concurrent users on each radio and 256 concurrent users on each AP; Huawei AP4050DN, AP4050DN-E, AP4051DN and AP4151DN supported 256 concurrent users on each radio and 512 concurrent users on each AP; Huawei AP4051TN supported 256 concurrent users on each radio and 768 concurrent users on each AP; See Table 4 for results. Huawei APs User Capacity Test Results Huawei AP Model AP2050DN One 2.4GHz radio and one 5GHz radio AP2050DN-E One 2.4GHz radio and one 5GHz radio AP2051DN One 2.4GHz radio and one 5GHz radio AP2051DN-E One 2.4GHz radio and one 5GHz radio AP4050DN One 2.4GHz radio and one 5GHz radio AP4050DN-E One 2.4GHz radio and one 5GHz radio AP4051DN One 2.4GHz radio and one 5GHz radio AP4151DN One 2.4GHz radio and one 5GHz radio AP4051TN One 2.4GHz radio and two 5GHz radio User Capacity per AP Source: Tolly, August 2018 Table 4 Page 9 of 18

10 Maximum Performance 2x2 MIMO wall plate APs under test include Huawei AP2050DN, AP2050DN-E, AP2051DN and AP2051DN-E as well as Cisco 1815w, Ruckus H510 and Aruba AP-303H. One Apple MacBook Pro was used to test the single STA performance with the 5GHz radio. 2x2 MIMO standard APs under test include Huawei AP4050DN, AP4051DN and AP4151DN as well as Cisco Aironet 1832i. One Apple MacBook Pro was used to test the single STA performance with the 5GHz radio. Huawei AP4051TN and New H3C WA5530 support 3 radios each. The two 5GHz radios support 4x4 MIMO 4 spatial streams and 2x2 MIMO 2 spatial streams. Two Apple MacBook Pro laptops were used to test dual 5GHz radios performance. Comparing to the same level access points, Huawei AP s TCP performance was similar to Cisco s and was better than Aruba and New H3C s; Huawei AP s UDP performance was better than Cisco, Aruba and New H3C. See Figure 10 and 11 for detailed results. Maximum Performance - 2x2:2 Wall Plate AP (as reported by Ixia IxChariot) Throughput (Mbps) HW AP2050DN HW AP2050DN-E HW AP2051DN HW AP2051DN-E Cisco 1815w Ruckus H510 H3C WA5320H Aruba AP-303H HW = Huawei TCP Single 5GHz UDP Single 5GHz Note: One Apple MacBook Pro was used as clients under the HT80 mode with downstream test traffic. Source: Tolly, August 2018 Figure 10 Maximum Performance Test Results (as reported by Ixia IxChariot) 2x2:2 Standard AP 4x4:4 + 2x2:2 Standard AP Throughput (Mbps) 1,600 1, ,5041, Huawei AP4050DN Huawei AP4051DN Huawei AP4151DN Cisco 1832i Huawei AP4051TN New H3C WA5530 TCP Single 5GHz UDP Single 5GHz TCP Dual 5GHz UDP Dual 5GHz Note: Apple MacBook Pro was used as clients under the HT80 mode with downstream test traffic. Single 5GHz tests used one client. Dual 5GHz tests used 2 clients. Cisco Aironet 1832i supports 3x3 MIMO and 2 spatial streams. Source: Tolly, August 2018 Figure 11 Page 10 of 18

11 Multi-client Performance In practice, one single AP typically has multiple clients connected. Tolly engineers tested each AP s aggregated throughput of all connected clients. Huawei wall plate AP and standard AP s multi-client throughput was higher than Ruckus and New H3C s. See Figure 13 for detailed results. Single AP Multi-client Throughput Test Environment AP on ceiling mount Source: Tolly, August 2018 Figure 12 Single AP Multi-client Throughput (reported by Ixia IxChariot) Throughput (Mbps) x2:2 Wall Plate AP - 80 Clients Three-radio AP Clients Huawei AP2051DN Huawei AP2051DN-E Ruckus H510 Huawei AP4051TN New H3C WA5320H TCP UDP Notes: 1. 2x2:2 wall plate AP used 80 clients (15 Xiaomi Mi5 smartphones - 1x1 clients, and 65 Xiaomi Redmi smartphones - 2x2 clients). 20 clients were connected to the 2.4GHz radio while 60 clients were connected to the 5GHz radio. 2. Three-radio AP used 120 clients (40 Apple MacBook Pro laptops - 3x3 clients, 15 Xiaomi Mi5-1x1 clients, and 65 Xiaomi Redmi - 2x2 clients). 20 clients were connected to the 2.4GHz radio while 50 clients were connected to each of the two 5GHz radios. Source: Tolly, August 2018 Figure 13 Page 11 of 18

12 Smart Antennas Huawei AP2051DN and AP2051DN-E are 2x2: ac Wave 2 wall plate APs with smart antennas for precise coverage, low interference and high signal strength. Ruckus H510 has similar specifications. New H3C s counterpart AP WA5320H does not support smart antennas. AP Location Smart Antennas Test Environment 34 Meters Client Location Tolly engineers chose one non-line-of-sight client location (34 meters away from the AP with obstacles in between) to evaluate single client s signal strength and performance. Engineers changed the AP facing angle and ran 3 tests. Huawei AP2051DN and AP2051DN-E s performance was always better than Ruckus H510 and New H3C WA5320H s. See Table 5 for detailed results. Source: Tolly, August 2018 Figure 14 Smart Antennas Test Results (reported by Ixia IxChariot) AP Model Direction 1 (AP directly facing the client) RSSI (dbm) TCP Throughput (Mbps) UDP Throughput (Mbps) Direction 2 (AP facing direction has +45 angle towards the client) RSSI (dbm) TCP Throughput (Mbps) UDP Throughput (Mbps) Direction 2 (AP facing direction has -45 angle towards the client) RSSI (dbm) TCP Throughput (Mbps) UDP Throughput (Mbps) Huawei AP2051DN Huawei AP2051DN-E Ruckus H New H3C WA5320H Notes: Higher throughput is better. One Apple MacBook Pro laptop was connected to the 5GHz radio as the client. 15 down streams with the IxChariot application was used as the test traffic. TCP tests used the High_Performance_Throughput script (file_zies = 1,000,000). UDP tests used the Throughput script (file_size = 1,000,000; send_buffer_size = 65,400; receive_buffer_size = 65,400). Source: Tolly, August 2018 Table 5 Page 12 of 18

13 MU-MIMO Performance MU-MIMO is an important feature of the ac Wave 2 protocol and enables the WLAN AP to communicate with multiple STAs simultaneously on the 5GHz frequency band. Tolly engineers tested SU- MIMO and MU-MIMO performance of each AP model and verified the gains brought by the MU-MIMO feature. APs of different vendors provide similar SU- MIMO performance for 1x1 MIMO STAs. However, the MU-MIMO performance of Huawei APs is better than that of Cisco, Aruba and New H3C APs. See Figure 15 and 16 for detailed results. MU-MIMO vs. SU-MIMO Test Results - Wall Plate AP (as reported by Ixia IxChariot) Throughput (Mbps) Note: Each used a single 5GHz radio with two Xiaomi Mi 5 smartphones connected. The MU-MIMO feature was turned off in the SU-MIMO test. Cisco Aironet 1832i supports 3x3 MIMO and two spatial streams. Other Apps support 2x2 MIMO and two spatial streams each. Downstream traffic was used as the test traffic. Source: Tolly, August 2018 Figure 15 MU-MIMO vs. SU-MIMO Test Results - Standard AP (as reported by Ixia IxChariot) Throughput (Mbps) 2x2:2 AP 4x4:4 + 2x2:2 AP Note: Other than Huawei AP4051TN and New H3C WA5530, all APs under test used one 5GHz radio with two Xiaomi Mi 5 smartphones. Huawei AP4051TN and New H3C WA5530 each used two 5GHz radios (one 4x4 MIMO and one 2x2 MIMO) with five Mi 5 smartphones (4x4 radio with three, 2x2 radio with two). When testing SU-MIMO, the MU-MIMO feature was turned off on each AP. Downstream traffic was used as the test traffic. Source: Tolly, August 2018 Figure 16 Page 13 of 18

14 High-Density Video Streaming In daily use, a large number of STAs may watch videos or browse web pages via the AP. Tolly engineers verified that each Huawei AP under test allowed a large number of users to concurrently watch videos without lagging or simultaneously browse web pages smoothly. Figure 17 shows the test environment and Table 6 lists the detailed test results. High-density Video Streaming Test Environment AP under test Note: This figure only shows partial of all STAs used in the test. There were 45 Apple MacBook Pro laptops placed on surrounding desks. Source: Tolly, August 2018 Figure 17 Huawei AP Model Huawei APs High-density Video Streaming Test Results Number of users to stream a 720p HD video simultaneously via the AP Number of users to browse webpages simultaneously via the AP AP2050DN AP2050DN-E AP2051DN AP2051DN-E AP4050DN AP4050DN-E AP4051DN AP4151DN AP4051TN Note: 1. The bit rate of the 720p HD video was 1.22Mbps. The video file was stored on an video streaming system of a server. Each user browsed the ondemand video playing platform webpage first and then played the video in the web browser. 2.Detailed number of clients for the video streaming test are as following: AP2050DN and AP2050DN-E: 45 Apple MacBook Pro, 8 Apple iphones and 47 Huawei tablets; AP4050DN, AP4050DN-E, AP4051DN and AP4151DN: 45 Apple MacBook Pro, 8 Apple iphones, 64 Huawei tablets, 1 Xiaomi Mi 6 and 2 Xiaomi Mi 4C; AP4051TN: 45 Apple MacBook Pro, 8 Apple iphones, 64 Huawei tablets, 1 Xiaomi Mi 6, 72 Xiaomi Mi 4C and 52 Xiaomi Note. Source: Tolly, August 2018 Table 6 Page 14 of 18

15 Application Recognition Huawei AP2050DN, AP2050DN-E, AP4050DN, AP4051DN, AP4151DN and AP4051TN support application recognition on the AC and the AP. According to Cisco s documentation, Aironet 1832i is not in supported models of Cisco AP side application recognition. In this evaluation, Tolly engineers used the application recognition feature on the AC. Engineers selected 17 applications and websites, and tested the application recognition capabilities by using the client to access the Internet. Huawei s application recognition repository includes 1,600 applications. Huawei recognized all 17 applications/websites under test while Cisco missed 7 of them. See Table 7 for detailed results. Internet AC: Access Controller AP: Access Point STA: Station Application Recognition Test Environment Note: Huawei supports application recognition on both the AC and the AP side. The test used tunnel forwarding to use the application recognition feature on the AC side. Source: Tolly, August 2018 Figure 18 Application Recognition Test Results Application Huawei Cisco Youtube Fox News BBC Speedtest.net Instagram Apple App Store WebEx ESPN Dropbox WeChat Weibo QQ Taobao Alipay Tencent News QQ File Transfer Baidu Cloud Storage Note: means the web management console displayed the application or website under test in the monitoring page while means not. Source: Tolly, August 2018 Table 7 Page 15 of 18

16 Interference Recognition Working with the Huawei AC, Huawei APs support spectrum analysis for non-wi-fi interference sources and can identify interference sources such as baby monitors, Bluetooth devices, 2.4 GHz and 5 GHz wireless radio transmitters, and microwave ovens. Test results show that Huawei AP2050DN, AP2050DN-E, AP4050DN, AP4051DN, AP4151DN and AP4051TN could accurately recognize the five types of interference sources mentioned above, while Cisco and Aruba APs could not or could not accurately identify some of them. See Table 8 for detailed results Traditional/Cloud Mode Switching Huawei AP2050DN, AP2050DN-E, AP2051DN, AP2051DN-E, AP4050DN, AP4051DN, AP4151DN and AP4051TN can work in traditional modes: Fit and Fat modes. Meanwhile, they can switch to the cloud mode without the need of hardware replacement. Tolly engineers verified that Huawei APs could go online, be managed, and transmit data in either traditional or cloud mode. PoE Out Huawei AP2051DN-E supported one PoE Out port to provide PoE power to an IP phone or an IoT device. Non-Wi-Fi Interference Source Recognition Test Results Interference Source Identified or Not Huawei Cisco Aruba Recognition Result Identified or Not Recognition Result Identified or Not Recognition Result Bluetooth file transfer Bluetooth BT link Bluetooth 2.4GHz wireless audio and video transmitter 2.4G wireless transmitter Continuous TX Fixed freq (video) 5GHz wireless audio and video transmitter 5G wireless transmitter Continuous TX Fixed freq (others) Baby monitor baby-monitor No interference source was detected Inaccurate Freq hopper (cordless network) Freq hopper (cordless base) Microwave oven microwave No interference source was detected Microwave Note: One Oricom baby monitor and one Midea microwave oven were used as the interference sources. Source: Tolly, August 2018 Table 8 Page 16 of 18

17 High Availability AC Hot Standby In the hot standby mode, the active and standby ACs back up related information in real time. During an active/standby switchover or switchback, STAs do not need to get authenticated again. Dual-system hot standby provides advantages such as fast switchover, small impact on services, and high availability. Tolly engineers performed a fast ping test and ran ping commands every 10 ms. The ping operation times out if no response is received within 10 ms. Tolly engineers verified the switchover and switchback time of ACs in direct forwarding mode and tunnel forwarding mode when the link between the AC and the switch was disconnected and when the active AC was powered off. If no packet was lost during the switchover, the switchover time was considered as shorter than 10 ms. If one packet was lost, the switchover time was considered as about 10 ms. If five to six packets were lost, the switchover time was considered as about 60 ms. In the direct forwarding mode, link failure and device failure s failover time was about 10 ms; in the tunnel forwarding mode, link and device failure s failover time was about 60 ms. See Table 9 for detailed results. Dual PoE Power Supplies To ensure stable network operation and facilitate future O&M, Huawei APs under test support dual PoE power supplies. For the Huawei AP4051TN, the AP could continue operating normally when one PoE link failed. For AP4051DN and AP4151DN, when one PoE link failed, clients need to login to the SSID again for proper use. Huawei AP Model AP4051TN AP4051DN AP4151DN Huawei AC Hot Standby Test Environment AC: Access Controller Switch AP: Access Point STA: Station Source: Tolly, August 2018 Figure 19 Huawei AC Hot Standby Test Results Link between the Active AC and the Switch Down - Failover Time (ms) Link between the Active AC and the Switch Recover - Switchback Time (ms) Active AC Down - Failover Time (ms) Source: Tolly, August 2018 Table 9 Huawei AP Dual PoE Power Supplies Dual PoE Power Supplies Active AC Recover - Switchback Time(ms) Direct Forwarding ~10 <10 ~10 <10 Tunnel Forwarding ~60 ~10 ~60 ~10 Hot Redundancy. When one PoE link failed, the AP continued working. Cold Redundancy. When one PoE link failed, clients need to login to the SSID again for proper use. Source: Tolly, August 2018 Table 10 Page 17 of 18

18 About Tolly The Tolly Group companies have been delivering world-class IT services for more than 25 years. Tolly is a leading global provider of third-party validation services for vendors of IT products, components and services. Test Equipment Summary The Tolly Group gratefully acknowledges the providers of test equipment/software used in this project. Vendor Product Web You can reach the company by at sales@tolly.com, or by telephone at Visit Tolly on the Internet at: Ixia IxChariot Terms of Usage This document is provided, free-of-charge, to help you understand whether a given product, technology or service merits additional investigation for your particular needs. Any decision to purchase a product must be based on your own assessment of suitability based on your needs. The document should never be used as a substitute for advice from a qualified IT or business professional. This evaluation was focused on illustrating specific features and/or performance of the product(s) and was conducted under controlled, laboratory conditions. Certain tests may have been tailored to reflect performance under ideal conditions; performance may vary under real-world conditions. Users should run tests based on their own real-world scenarios to validate performance for their own networks. Reasonable efforts were made to ensure the accuracy of the data contained herein but errors and/or oversights can occur. The test/ audit documented herein may also rely on various test tools the accuracy of which is beyond our control. Furthermore, the document relies on certain representations by the sponsor that are beyond our control to verify. Among these is that the software/ hardware tested is production or production track and is, or will be, available in equivalent or better form to commercial customers. Accordingly, this document is provided "as is", and Tolly Enterprises, LLC (Tolly) gives no warranty, representation or undertaking, whether express or implied, and accepts no legal responsibility, whether direct or indirect, for the accuracy, completeness, usefulness or suitability of any information contained herein. By reviewing this document, you agree that your use of any information contained herein is at your own risk, and you accept all risks and responsibility for losses, damages, costs and other consequences resulting directly or indirectly from any information or material available on it. Tolly is not responsible for, and you agree to hold Tolly and its related affiliates harmless from any loss, harm, injury or damage resulting from or arising out of your use of or reliance on any of the information provided herein. Tolly makes no claim as to whether any product or company described herein is suitable for investment. You should obtain your own independent professional advice, whether legal, accounting or otherwise, before proceeding with any investment or project related to any information, products or companies described herein. When foreign translations exist, the English document is considered authoritative. To assure accuracy, only use documents downloaded directly from Tolly.com. No part of any document may be reproduced, in whole or in part, without the specific written permission of Tolly. All trademarks used in the document are owned by their respective owners. You agree not to use any trademark in or as the whole or part of your own trademarks in connection with any activities, products or services which are not ours, or in a manner which may be confusing, misleading or deceptive or in a manner that disparages us or our information, projects or developments ivcofs22 yx verm Page 18 of 18