1. Introducció
This manual provides detailed instructions for the Cisco Small Business 300 Series Managed Switch, model SF300-48P (SRW248G4P-K9-NA). It covers the physical installation, initial configuration, operational procedures, maintenance guidelines, and troubleshooting steps to ensure optimal performance and longevity of your device. Please read this manual thoroughly before operating the switch.
2. Producte acabatview
The Cisco SF300-48P is a 48-port 10/100 Power over Ethernet (PoE) managed switch, designed for small businesses requiring advanced network capabilities. It features Gigabit Ethernet uplinks for high-speed connectivity to the network backbone or servers. This switch provides a secure and reliable foundation for business-class networks, supporting features such as VLANs, Quality of Service (QoS), and comprehensive security options.

Figura 1: Davant view of the Cisco SF300-48P Managed Switch. This image displays the 48 Fast Ethernet ports, two Gigabit Ethernet uplink ports, and system status indicators.
3. Configuració
3.1. Contingut del paquet
Comproveu que el vostre paquet contingui els elements següents:
- Cisco SF300-48P Managed Switch
- Cable d'alimentació
- Rack-mount kit (if applicable)
- Cable de la consola
- CD de documentació
3.2. Instal·lació física
The SF300-48P switch can be installed on a desktop or mounted in a standard 19-inch equipment rack.
- Instal·lació d'escriptori: Col·loqueu l'interruptor sobre una superfície plana i estable. Assegureu-vos que hi hagi una ventilació adequada al voltant del dispositiu.
- Rack-Mount Installation: Attach the provided rack-mount brackets to the sides of the switch using the included screws. Secure the switch into the rack using appropriate rack screws.
3.3. Connexió d'alimentació
Connect the power cord to the AC power inlet on the rear panel of the switch and then to a grounded electrical outlet. The switch will power on automatically.
3.4. Connexions de xarxa
- Ports de dades: Connect network devices (computers, printers, IP phones) to the 10/100 Fast Ethernet ports using standard Ethernet cables.
- Dispositius PoE: For devices requiring Power over Ethernet, connect them to any of the 48 Fast Ethernet ports. The switch will automatically detect and power compliant PoE devices.
- Ports d'enllaç ascendent: Use the Gigabit Ethernet uplink ports to connect the switch to your core network, router, or other switches for high-speed data transfer.
3.5. Accés a la configuració inicial
El commutador es pot configurar mitjançant un webinterfície gràfica d'usuari (GUI) basada en o una interfície de línia d'ordres (CLI) a través del port de consola.
- Web GUI: Connect a computer to any switch port. The switch typically obtains an IP address via DHCP or uses a default static IP. Refer to the documentation CD for default IP address information. Open a web navegador i introduïu l'adreça IP del commutador.
- Console CLI: Connect a computer to the switch's console port using the provided console cable. Use a terminal emulation program (e.g., PuTTY) with appropriate serial port settings (e.g., 115200 bps, 8 data bits, no parity, 1 stop bit, no flow control).
4. Instruccions de funcionament
The Cisco SF300-48P is a managed switch, offering extensive configuration options to optimize your network. Key operational aspects include:
- Configuració de VLAN: Create and manage Virtual Local Area Networks to segment network traffic and enhance security.
- Qualitat de servei (QoS): Prioritize critical network traffic (e.g., voice, video) to ensure consistent performance.
- Característiques de seguretat: Implement access control lists (ACLs), port security, and other security measures to protect your network from unauthorized access.
- Agregació d'enllaços (LAG): Combina diversos enllaços físics en un únic enllaç lògic per augmentar l'amplada de banda i proporcionar redundància d'enllaços.
- Spanning Tree Protocol (STP): Prevent network loops and ensure network stability.
- Seguiment: Utilitzeu el web GUI or CLI to monitor port status, traffic statistics, and system logs.
For detailed configuration steps for each feature, refer to the comprehensive user guide available on the Cisco support website or the documentation CD.
5. Manteniment
Regular maintenance ensures the reliable operation and longevity of your Cisco switch.
- Actualitzacions de firmware: Periodically check the Cisco support website for new firmware versions. Updating the firmware can provide new features, performance improvements, and security patches. Follow the instructions provided with the firmware update package carefully.
- Neteja física: Ensure the switch's ventilation openings are clear of dust and debris to prevent overheating. Use a soft, dry cloth to clean the exterior. Do not use liquid cleaners.
- Condicions ambientals: Operate the switch within the recommended temperature and humidity ranges specified in the product's technical specifications.
- Còpia de seguretat de la configuració: Regularly back up your switch configuration to an external device. This allows for quick restoration in case of a device failure or misconfiguration.
6. Solució De Problemes
This section provides solutions to common issues you might encounter with your SF300-48P switch.
6.1. Problemes d'energia
- Sense energia: Ensure the power cord is securely connected to both the switch and a working electrical outlet. Verify the outlet is receiving power.
- System LED Off: If the System LED is off, the switch is not receiving power or is experiencing a hardware issue. Check power connections.
6.2. Problemes de connectivitat de xarxa
- Sense enllaç al port: Check the Ethernet cable connection between the switch port and the connected device. Ensure the cable is not damaged. Verify the connected device is powered on and functioning correctly.
- Link LED Not Lit: If the Link/Act LED for a port is not lit, there is no active connection. Check cabling and the connected device.
- No Network Access: Verify the switch's IP configuration. Ensure VLAN settings are correct for the connected devices. Check for IP address conflicts.
6.3. PoE Issues
- El dispositiu PoE no s'encén: Ensure the connected device is PoE compliant. Check the switch's PoE budget and individual port power settings. Verify the cable length does not exceed standard Ethernet limits.
6.4. Restabliment de fàbrica
If configuration issues persist, you may need to reset the switch to its factory default settings. This will erase all custom configurations. Refer to the full user guide for the specific procedure, which typically involves pressing a reset button or using a CLI command.
7. Especificacions
| Característica | Especificació |
|---|---|
| Fabricant | Cisco Small Business |
| Número de model | SRW248G4P-K9-NA (SF300-48P) |
| UPC | 882658296284, 088021467286 |
| Dimensions del producte (LxWxH) | 22.05 x 19.88 x 4.13 polzades |
| Pes de l'article | 16 lliures |
| Nombre de Ports | 48 x 10/100 PoE + Gigabit Uplinks |
| Tipus d'interfície | RJ45 |
| Dispositius compatibles | Desktop, Network Devices |
| Data de primera disponibilitat | 26 d'abril de 2011 |
8. Informació de la garantia
Cisco products typically come with a limited hardware warranty. Specific warranty terms and conditions, including duration and coverage, are provided with your product purchase or can be found on the official Cisco weblloc web. Si us plau, conserveu el comprovant de compra per a reclamacions de garantia.
9. Suport
For technical assistance, additional documentation, software downloads, and community forums, please visit the official Cisco Support website. You can find comprehensive resources by searching for your specific model number (SF300-48P or SRW248G4P-K9-NA).
Suport de Cisco Weblloc: https://www.cisco.com/c/en/us/support/index.html





