Cisco 1921 Series Router User Manual

1. Giới thiệu

This manual provides essential information for the installation, operation, and maintenance of your Cisco 1921 Series Integrated Services Router (ISR). The Cisco 1921 is designed to deliver highly secure data, mobility, and application services for small offices and enterprise branch offices. It features embedded hardware encryption acceleration and advanced security services.

Vui lòng đọc kỹ hướng dẫn sử dụng này trước khi tiến hành cài đặt hoặc vận hành thiết bị để đảm bảo chức năng hoạt động đúng cách và an toàn.

2. Thông tin an toàn

Tuân thủ các biện pháp phòng ngừa an toàn sau đây để tránh thương tích và hư hỏng thiết bị:

• Ngắt kết nối nguồn: Always disconnect power before installing or removing interface cards or performing any maintenance.
• Thông gió: Ensure adequate airflow around the router to prevent overheating. Do not block ventilation openings.
• Nguồn điện: Connect the router only to the specified power source (100-240 V~, 50-60 Hz, 1A).
• Tiếp đất: Ensure the router is properly grounded to prevent electrical shock.
• Môi trường: Operate the device in a clean, dry environment within specified temperature and humidity ranges.
• Cài đặt chuyên nghiệp: If you are unfamiliar with network equipment installation, seek assistance from a qualified professional.

3. Nội dung gói hàng

Xác minh rằng gói của bạn chứa các mục sau:

• Cisco 1921 Series Router
• Giá đỡ
• AC Power Cable (Cab-AC)
• Tài liệu (sách hướng dẫn này)

Nếu phát hiện bất kỳ mặt hàng nào bị thiếu hoặc hư hỏng, hãy liên hệ ngay với nhà cung cấp.

4. Vật lý trênview

The following image illustrates the rear panel of the Cisco 1921 Series Router, highlighting key ports and indicators.

Figure 4.1: Rear Panel of Cisco 1921 Series Router. This view shows the two EHWIC slots (EHWIC 0 and EHWIC 1) for interface cards, a FLASH slot, AUX and CONSOLE ports (RJ-45), two Gigabit Ethernet ports (GE 0/0 and GE 0/1), a USB port, a BAUD/RESET button, a PoE port (48VDC 1.67A), a grounding point, the Cisco logo, and the AC power input (100-240 V~, 50-60 Hz, 1A) with an integrated power switch.

4.1. Rear Panel Components

• EHWIC Slots (EHWIC 0, EHWIC 1): These slots are for installing Enhanced High-Speed WAN Interface Cards. Important: Do not install interface cards with power applied to the router.
• TỐC BIẾN: Slot for a CompactFlash memory card, used for storing the Cisco IOS image and configuration files.
• Cổng AUX: An RJ-45 auxiliary port, typically used for out-of-band management via a modem.
• Cổng điều khiển: An RJ-45 console port for direct, local management and initial configuration using a terminal emulator.
• Gigabit Ethernet Ports (GE 0/0, GE 0/1): Two RJ-45 ports for high-speed network connections.
• Cổng USB: A USB Type-A port for connecting USB flash drives for configuration backup, restoration, or software upgrades.
• BAUD/RESET Button: A recessed button for resetting the router or changing the console baud rate.
• Cổng PoE: A Power over Ethernet port, providing 48VDC at 1.67A for compatible devices.
• Grounding Point: For connecting an earth ground wire.
• Công suất đầu vào: AC power receptacle (100-240 V~, 50-60 Hz, 1A) with an integrated power switch.

5. Thiết lập

5.1. Chuẩn bị địa điểm

• Place the router on a stable, flat surface or install it in a standard 19-inch equipment rack using the provided rackmounts.
• Ensure the operating environment is within the recommended temperature and humidity ranges.
• Provide at least 3 inches (7.6 cm) of clearance around the router for proper ventilation.

5.2. Kết nối nguồn

1. Ensure the power switch on the rear panel is in the OFF (O) position.
2. Connect the AC power cable to the power input receptacle on the router's rear panel.
3. Connect the other end of the AC power cable to a grounded electrical outlet.
4. If required, connect a grounding wire to the grounding point on the router and to a suitable earth ground.

5.3. Initial Network Connections

• Kết nối bảng điều khiển: For initial configuration, connect a console cable (RJ-45 to DB-9 or USB) from your computer's serial port or USB port to the router's CONSOLE port. Configure your terminal emulator (e.g., PuTTY, Tera Term) with the following settings: 9600 baud, 8 data bits, no parity, 1 stop bit, no flow control.
• Kết nối Ethernet: Connect your local network devices (switches, computers) to the Gigabit Ethernet ports (GE 0/0, GE 0/1). Connect your WAN uplink (e.g., modem) to the designated WAN interface, which might be one of the GE ports or an installed EHWIC.

6. Hướng dẫn vận hành

6.1. Bật nguồn bộ định tuyến

After all physical connections are made, switch the power button on the rear panel to the ON (I) position. The router will begin its boot sequence. Observe the system LEDs for status indications.

6.2. Accessing the Command-Line Interface (CLI)

Once the router has booted, you can access the Cisco IOS CLI via the console connection. This interface is used for all configuration and management tasks. Basic commands include:

• enable: Vào chế độ EXEC đặc quyền.
• configure terminal: Vào chế độ cấu hình toàn cục.
• show running-config: Displays the current active configuration.
• copy running-config startup-configLưu cấu hình hiện tại vào NVRAM.

For detailed configuration, refer to Cisco's official documentation for Cisco IOS.

6.3. Basic Network Configuration

Initial configuration typically involves setting hostnames, IP addresses on interfaces, routing protocols, and security features. The CISCO1921-SEC/K9 model includes advanced security services, which can be configured via the IOS Zone-Based Firewall.

7. Bảo trì

7.1. Cập nhật phần mềm

Kiểm tra hỗ trợ của Cisco thường xuyên website for the latest IOS software images and security updates. Updating the software ensures optimal performance, security, and access to new features. Always follow Cisco's recommended upgrade procedures.

7.2. Vệ sinh

Keep the router clean and free of dust. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or aerosol sprays directly on the device. Ensure ventilation openings are clear of obstructions.

7.3. Sao lưu cấu hình

Periodically back up your router's configuration to a TFTP server or a USB flash drive. This allows for quick restoration in case of configuration loss or device replacement.

KHAI THÁC. Xử lý sự cố

8.1. Không có điện

• Hãy kiểm tra xem dây nguồn đã được kết nối chắc chắn với cả bộ định tuyến và ổ cắm điện chưa.
• Ensure the power switch on the rear panel is in the ON (I) position.
• Kiểm tra ổ cắm điện bằng một thiết bị khác để xác nhận nó hoạt động bình thường.

8.2. Không có kết nối mạng

• Check the link status LEDs on the Ethernet ports. If they are off, verify cable connections and the status of the connected device.
• Confirm IP address configurations and routing tables using the CLI.
• Ensure that any firewalls or access control lists (ACLs) are not blocking traffic.

8.3. Router Not Responding

If the router becomes unresponsive, you may need to perform a reset. Locate the recessed CÀI LẠI button on the rear panel. Use a paperclip or similar pointed object to press and hold the button for a few seconds. This will typically reboot the router. Consult Cisco documentation for specific reset procedures, as a factory reset might require different steps.

9. Thông số kỹ thuật

10. Bảo hành và Hỗ trợ

10.1. Thông tin bảo hành

Sản phẩm này thường đi kèm với một 30 DAYS WARRANTY FOR DEFECTIVE ONLY from the reseller. For specific warranty terms and conditions, please refer to your purchase agreement or contact your point of sale. Note that Cisco's official warranty policies may vary, and equipment not purchased from an authorized reseller might have limited or no direct Cisco warranty support.

10.2. Hỗ trợ kỹ thuật

For technical assistance, configuration guidance, or advanced troubleshooting, it is recommended to consult the official Cisco documentation available on the Cisco webđịa điểm. You may also contact Cisco Technical Assistance Center (TAC) if you have an active service contract.