| Model |
C9120AXI-S |
| Software |
● Cisco Unified Wireless Network Software Release 8.9.x or later |
| ● Cisco IOS XE Software Release 16.11 with AP Device Pack, or later |
| Supported wireless LAN controllers |
● Cisco Catalyst 9800 Series Wireless Controllers |
| ● Cisco 3500, 5520, and 8540 Series Wireless Controllers and Cisco Virtual Wireless Controller |
| 802.11n version 2.0 (and related) capabilities |
● 4x4 MIMO with four spatial streams |
| ● Maximal Ratio Combining (MRC) |
| ● 802.11n and 802.11a/g beamforming |
| ● 20- and 40-MHz channels |
| ● PHY data rates up to 890 Mbps (40 MHz with 5 GHz and 20 MHz with 2.4 GHz) |
| ● Packet aggregation: A-MPDU (transmit and receive), A-MSDU (transmit and receive) |
| ● 802.11 Dynamic Frequency Selection (DFS) |
| ● Cyclic Shift Diversity (CSD) support |
| 802.11ac |
● 4x4 downlink MU-MIMO with four spatial streams |
| ● MRC |
| ● 802.11ac beamforming |
| ● 20-, 40-, 80-, and 160-MHz channels |
| ● PHY data rates up to 3.47 Gbps (160 MHz with 5 GHz) |
| ● Packet aggregation: A-MPDU (transmit and receive), A-MSDU (transmit and receive) |
| ● 802.11 DFS |
| ● CSD support |
| 802.11ax |
● 4x4 downlink MU-MIMO with four spatial streams |
| ● Uplink/downlink OFDMA |
| ● TWT |
| ● BSS coloring |
| ● MRC |
| ● 802.11ax beamforming |
| ● 20-, 40-, 80-, and 160-MHz channels |
| ● PHY data rates up to 5.38 Gbps (160 MHz with 5 GHz and 20 MHz with 2.4 GHz) |
| ● Packet aggregation: A-MPDU (transmit and receive), A-MSDU (transmit and receive) |
| ● 802.11 DFS |
| ● CSD support |
| Integrated antenna |
Flexible radio (either on 2.4 GHz or on 5 GHz) |
| ● 2.4 GHz, peak gain 4 dBi, internal antenna, omnidirectional in azimuth |
| ● 5 GHz, peak gain 5 dBi, internal antenna, omnidirectional in azimuth |
| Dedicated 5-GHz radio |
| ● 5 GHz, peak gain 5 dBi, internal antenna, omnidirectional in azimuth |
| External antenna (sold separately) |
● Cisco Catalyst 9120AXE Access Points are certified for use with antenna gains up to 6 dBi (2.4 GHz and 5 GHz) |
| ● Cisco Catalyst 9120AXP Access Points) are certified for use with antenna gains up to 13 dBi (2.4 GHz and 5 GHz) with the AIR-ANT2513P4M-N= antenna |
| ● Cisco offers the industry's broadest selection of antennas, delivering optimal coverage for a variety of deployment scenarios |
| ● Supports Self-Identifiable Antennas (SIA) on one RP-TNC port |
| ● For more details, see the Catalyst 9120AX Series Deployment Guide. |
| Smart antenna connector |
● Available on the 9120AXE and 9120AXP only |
| ● Compact multi-RF connector with DART interface |
| ● Requires the AIR-CAB002-DART-R= 2 ft smart antenna connector when used with antennas with RP-TNC connector |
| ● Required when running the flexible radio as either a second 5-GHz serving radio or a Wireless Security Monitoring radio |
| Interfaces |
● 1x 100M, 1G, 2.5G Multigigabit Ethernet (RJ-45) |
| ● Management console port (RJ-45) |
| ● USB 2.0 @ 4.5W |
| Indicators |
● Status LED indicates boot loader status, association status, operating status, boot loader warnings, and boot loader errors |
| Dimensions(W x L x H) |
● Access point (without mounting brackets): C9120AXI: 8.5 x 8.5 x 1.7” (21.6 x 21.6 x 4.3 cm) |
| Weight |
Cisco Catalyst 9120AXI |
| ● 2.87 lb (1.3 kg) |
| Input power requirements |
● 802.3at Power over Ethernet Plus (PoE+), 802.3bt Cisco Universal PoE (Cisco UPOE+, Cisco UPOE) |
| ● 802.3af PoE |
| ● Cisco power injector, AIR-PWRINJ6= (Note: This injector supports only 802.3at) |
| ● Cisco power injector, AIR-PWRINJ5= (Note: This injector supports only 802.3af) |
| Environmental |
Cisco Catalyst 9120AXI |
| ● Nonoperating (storage) temperature: -22° to 158°F (-30° to 70°C) |
| ● Nonoperating (storage) altitude test: 25˚C, 15,000 ft. |
| ● Operating temperature: 32° to 122°F (0° to 50°C) |
| ● Operating humidity: 10% to 90% (noncondensing) |
| ● Operating altitude test: 40˚C, 9843 ft. |
| Note: When the ambient operating temperature exceeds 40°C, the access point will shift from 4x4 to 2x2 on both the 2.4-GHz and 5-GHz radios, uplink Ethernet will downgrade to 1 Gigabit Ethernet; however, the USB interface will remain enabled |
| System memory |
● 2048 MB DRAM |
| ● 1024 MB flash |
| Available transmit power settings |
2.4 GHz |
5 GHz |
| ● 23 dBm (200 mW) |
● 23 dBm (200 mW) |
| ● -4dBm(0.39mW) |
● -4dBm (0.39mW) |
Khi gặp sự cố thì các bước khắc phục lỗi phổ biến cho C9120AXI-S là gì vậy admin?
Thưa anh, khi gặp lỗi với C9120AXI-S, anh nên thử: Kiểm tra nguồn PoE đủ chuẩn 802.3at/bt chưa. Quan sát đèn LED để xác định trạng thái lỗi. Dùng tính năng Intelligent Capture để phân tích sâu. Kiểm tra phiên bản phần mềm IOS XE và cấu hình RF. Khởi động lại nếu cần – cách đơn giản mà hiệu quả.
Cisco Catalyst C9120AXI-S có cần nâng cấp thường xuyên trong quá trình sử dụng không shop?
Thông thường, chỉ cần nâng cấp khi có bản vá bảo mật hoặc cần tính năng mới, không cần thực hiện quá thường xuyên.
Cơ chế Dynamic Frequency Selection (DFS) trên băng tần 5GHz được triển khai ra sao để tránh xung đột với radar vậy shop?
Giám sát tín hiệu radar: Access Point (AP) liên tục theo dõi các kênh DFS trong băng tần 5GHz để phát hiện tín hiệu radar. Phát hiện radar → chuyển kênh: Nếu AP phát hiện tín hiệu radar trên kênh đang sử dụng.