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by Cisco
Product Line: Cisco Catalyst 4948E-F Series
Product Type: Ethernet Switch
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Product Description

The WS-C4948E-F-S CISCO is equipped with 48 10/100/1000 (RJ45) ports and 4 10GbE (SFP+) ports, designed for high-density connectivity and optimized for high performance with a switching capacity of 176 Gbps and a throughput of 131 Mpps (IPv4). This 1 RU switch supports a maximum power consumption of 275 W, offers back-to-front cooling, and features hot-swappable fans for enhanced operational reliability. It supports up to 57,000 routes, 55,000 MAC addresses, and 4094 active VLANs, making it suitable for complex network environments requiring efficient traffic management and scalability.

FAQs for the WS-C4948E-F-S

  • What is the number of 10/100/1000 (RJ45) ports available on the switch?
    - The switch has 48 10/100/1000 (RJ45) ports.
  • How many 10GbE (SFP+) ports does the switch offer?
    - It offers 4 10GbE (SFP+) ports.
  • What type of power supply does the switch use?
    - The switch uses an AC power supply.
  • Can you describe the airflow direction for cooling in this device?
    - The device utilizes back-to-front cooling for efficient thermal management.
  • What is the height of the switch in rack units (RU)?
    - The switch occupies 1 rack unit (RU) in height.
  • What are the dimensions of the switch?
    - The dimensions are 1.75 x 17.5 x 19.4 inches (H x W x D).
  • Is the fan in the switch hot-swappable?
    - Yes, the fan is hot-swappable for easy maintenance.
  • What is the average power consumption of the switch?
    - The average power consumption is 230 W.
  • What are the rack mounting options available for the switch?
    - The switch can be mounted using front and rear mount, or high-performance rear mount options.
  • What is the switching capacity of the switch?
    - The switching capacity is 176 Gbps.

Product Review

The CISCO WS-C4948E-F-S offers 48 10/100/1000 RJ45 ports and 4 10GbE SFP+ ports, catering to high-density networking requirements and facilitating efficient uplink connectivity. However, it lacks support for Cisco TwinGig and OneX Converter Modules, limiting flexibility in network design and expansion. With a switching capacity of 176 Gbps and power consumption peaking at 275W, it balances performance and energy use, but its absence of converter module support may necessitate additional investment for those requiring adaptable interface options.


The CISCO WS-C4948E-F-S is a high-performance, Ethernet switch designed for enterprise networks. This model boasts a comprehensive set of features suitable for a wide range of applications, from high-density workplace environments to data centers. With its compact 1 Rack Unit (RU) size, measuring 1.75 x 17.5 x 19.4 inches and weighing 19 lbs, it is engineered for efficient use of rack space while delivering powerful network capabilities. Key hardware specifications include: - 48 10/100/1000 (RJ45) ports, providing versatile connectivity options for a variety of network devices. - 4 10GbE (SFP+) ports, enabling high-speed uplink or stacking capabilities for increased bandwidth and network expansion. - AC power supply, ensuring reliable power delivery to the switch under various operational conditions. The switch is equipped with a back-to-front cooling airflow system, optimizing thermal management and ensuring sustained performance under high workloads. It supports an average power consumption of 230 W, with a maximum power consumption of 275 W, reflecting its efficiency in energy usage. For enhanced network reliability and flexibility, the switch features a hot-swappable fan, allowing maintenance or replacement without disrupting network operations. The rack mounting options include front and rear mount, along with a high-performance rear mount, providing flexibility in installation to accommodate different rack configurations. Performance metrics reveal a switching capacity of 176 Gbps and a throughput of 131 Mpps (IPv4) and 110 Mpps (IPv6), indicative of its ability to handle large volumes of data traffic efficiently. The switch supports 57,000 routes, 55,000 MAC addresses, and up to 4094 VLAN IDs, Spanning Tree Protocol instances, Switched Virtual Interfaces, and active VLANs, illustrating its extensive capability in managing complex network architectures. Additional specifications include:
  • Support for up to 28,000 multicast routes and 32,000 hardware entries, ensuring comprehensive coverage for multicast applications and extensive addressability within the network.
  • Switched Port Analyzer (SPAN) capability with 8 ingress and 8 egress ports, enabling detailed network traffic monitoring for enhanced visibility and troubleshooting.
  • Compatibility with SFP and SFP+ uplink optic types, though it does not support Cisco TwinGig or OneX Converter Modules, focusing instead on direct, high-speed connectivity.
Despite its extensive feature set, it's important to note that the CISCO WS-C4948E-F-S does not support Cisco TwinGig or OneX Converter Modules, indicating a design choice favoring direct fiber connections over modular port expansion. This decision aligns with the switch's emphasis on high-capacity, high-speed networking environments where performance and reliability are paramount. In summary, the CISCO WS-C4948E-F-S stands out as a capable and reliable solution for organizations seeking to enhance their network infrastructure. Its combination of high-density port availability, advanced features, and efficient design makes it a valuable asset for managing complex, high-volume network demands.


Model NumberCISCO WS-C4948E-F-S
Gigabit Ethernet Ports Count48
10 Gigabit Ethernet SFP+ Ports Quantity4
Power Source TypeAC
Cooling MechanismBack-to-Front Airflow
Unit Rack Height1 RU
Dimensions (Height x Width x Depth)1.75 x 17.5 x 19.4 inches
Unit Weight19 pounds
Replaceable FansYes
Typical Power Usage230 Watts
Peak Power Draw275 Watts
Mounting OptionsSupport for Both Front and Rear Mount, Enhanced Rear Mount
Compatible Uplink ModulesSFP and SFP+
Support for Cisco TwinGig ModulesNo
Support for Cisco OneX ModulesNo
Switch Fabric Capacity176 Gigabits per second
Data Transfer Rate131 Million packets per second (IPv4), 110 Million packets per second (IPv6)
Route Entries Capacity57,000
MAC Address Table Size55,000
Maximum VLANs and PVST Instances4094
Maximum Spanning Tree Instances4094
Switched Virtual Interfaces (SVIs)4094
Active VLANs Support4094
Max Multicast Routes28,000
Layer 3 Hardware Entries32,000
SPAN Sessions8 Ingress, 8 Egress

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