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Cisco Refurbished
Original Part No : WS-C4948E

Cat 4948E,opt SW,48pt 10/100/1000+4SFP+no PS REMANUFACTURED

Availability: In stock

Available Quantity: 15525

Delivery Time: 2 to 4 week

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    Product Overview

    The Cisco Catalyst® 4948E and 4948E-F Ethernet Switches are the Cisco Catalyst 4900 Series data center switches built from the start to deliver best-in-class, full-featured server-access switching. The switches include identical features except that the Cisco Catalyst 4948E offers front-to-back cooling, and the Cisco Catalyst 4948E-F offers back-to-front cooling. Each switch offers forty-eight 10/100/1000-Gbps RJ45 downlink ports and four 1 and 10 Gigabit Ethernet uplink ports. The switches are designed to simplify data center architecture and operations by offering service provider-grade hardware and software in a one-rack-unit (1RU) form factor optimized for full-featured top-of-rack (ToR) data center deployments (Figure 1).

    Figure 1. Cisco Catalyst 4948E and 4948E-F Front Panel


    The Cisco Catalyst 4948E and 4948E-F build on the advanced technology of the Cisco Catalyst 4948 Switches, the most widely deployed ToR switch in the industry, with more than 10 million ports deployed worldwide. The Cisco Catalyst 4948E and 4948E-F double the uplink bandwidth and offer true front-to-back and back-to-front airflow with no side or top venting. The airflow direction is controlled by the changing of fans. Optional front-to-back and back-to-front airflow management reduces data center operating costs by providing strict hot-aisle and cold-aisle isolation.

    Hot-aisle and cold-aisle deployment remains the widely adopted best practice for data center cabinet layouts today. Networking switches and computing servers mounted in a single cabinet need to maintain the separation of the inlet cold air and the exhaust hot air for efficient use of cooling resources. The Cisco Catalyst 4948E and 4948E-F switches provide the option of front-to-back airflow (Cisco Catalyst 4948E) and back-to-front airflow (Cisco Catalyst 4948E-F) for ToR switch deployments.

    Exceptional reliability and serviceability are delivered with optional internal AC and DC 1+1 hot-swappable power supplies and a hot-swappable fan tray with redundant fans (Figures 2 and 3).

    Figure 2. Cisco Catalyst 4948E Front-to-Back Air-Cooled Switch Rear Panel


    Figure 3. Cisco Catalyst 4948E-F Back-to-Front Air-Cooled Switch Rear Panel


    The Cisco Catalyst 4948E and 4948E-F switches offer:

    Scalability and Performance

    ● Nonblocking server-to-server traffic with 176-Gbps aggregate throughput

    ● Ease of migration from Gigabit Ethernet to 10 Gigabit Ethernet upstream with support for SFP and SFP+ optics

    ● Large buffers optimized to handle microbursts with 17.5 MB of centralized buffering, helping ensure that business-critical packets are not lost due to insufficient buffering

    ● Active queue management through dynamic buffer limiting for TCP throughput optimizations

    ● Investment protection through data center design with dual-stack IP Versions 4 and 6 (IPv4 and v6) support

    ● Advanced quality of service (QoS) with eight configurable queues for each port

    ● Data center server virtualization support for larger Layer 2 domains with scalable MAC addresses

    ● Support for a wide variety of optics connecting to the aggregation layer

    ● Front-to-back and back-to-front airflow options

    Enhanced Manageability

    ● Pay as you grow with software feature packages, from Layer 2 only (LAN Base) to full Layer 3 capability (Enterprise Services)

    ● Reduced operating expenses (OpEx) with tools such as AutoInstall and Cisco IOS® Embedded Event Manager (EEM) that enable immediate availability

    ● Data center automation with IP service-level agreement (SLA) and Smart Call Home

    ● Data center optimization with true front-to-back and back-to-front airflow, including power supply cooling

    ● Enhanced application visibility with smart flow logging

    ● Enhanced manageability through eight bidirectional Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN) sessions

    ● Network visibility through Cisco® NetFlow-Lite (future support)


    ● 1+1 AC or DC power supplies and hot-swappable fan tray with redundant fans for high availability for mission-critical applications

    ● Optimized forwarding across all four uplinks with equal-cost multipath (ECMP) load sharing

    ● Improved resiliency with protection from attacks with access control lists (ACLs), Control Plane Policing (CoPP), Address Resolution Protocol (ARP) inspection, and Dynamic Host Configuration Protocol (DHCP) snooping

    ● Active queue management using dynamic buffer limiting (DBL) for increased security and network control

    Cisco IOS Software

    Cisco IOS Software is a proven network OS that offers best-in-class availability, manageability, and scalability.

    The Cisco Catalyst 4948E and 4948E-F support three levels of Cisco IOS Software. The basic level is LAN Base, developed for deployments that require data center-class hardware along with Layer 2 switching but not advanced features such as routing and Cisco IOS EEM. The next level of software is IP Base; this level supports static routes, Routing Information Protocol (RIP) Versions and 2, and Enhanced Interior Gateway Routing Protocol Stub (EIGRP-Stub) for limited routing. The top level of software is Enterprise Services; this level adds support for advanced routing protocols such as Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS) Protocol, and EIGRP. For a detailed list of supported software features, please refer to the software release notes at

    Smart Top-of-Rack Design

    Historically, data center design engineers have had to trade off access-layer features such as QoS, network visibility, and security when moving from an end-of-row (EoR) to a ToR data center design. The Cisco Catalyst 4948E and 4948E-F offer the same features found on large EoR data center switches in a 1RU form factor optimized for ToR deployments.

    A few of the features specific to smart ToR switches are:

    ● Server-rack-optimized switches with the option of front-to-back or back-to-front airflow

    ● Nonblocking hardware-based switching and routing

    ● Full support for access- and distribution-level Layer 3 routing

    ● Advanced QoS including a modular QoS command-line interface (CLI)

    ● Advanced security

    ● Extended MAC address support for virtual environments

    ● Network visibility (future support)

    Data centers focused on the following applications should deploy smart ToR switches:

    ● High-performance technical computing (grid)

    ● Enterprise and service provider cloud

    ● Virtual desktop environments

    ● Network and server virtualized data centers

    ● Web services

    ● Enterprise IT

    Cisco IOS Embedded Event Manager

    Cisco IOS EEM is a unique subsystem within Cisco IOS Software that allows customers to create and asynchronously run scripts directly on a router or switch. Scripts can be programmed using a simple CLI. Cisco IOS EEM responds to real-time events to automate tasks or to take automatic action based on condition detection. Customers can also use Cisco IOS EEM to create custom commands to reduce deployment and management complexity. Scripts can enable simple to complex automated actions, such as entering a log item or changing a port configuration in response to a security threat.

    Visit the open Cisco IOS EEM scripting community, Cisco Beyond, for sample Cisco IOS EEM scripts.

    Optimized for Multimedia Applications

    The Cisco Catalyst 4948E and 4948E-F are optimized for multimedia applications, with advanced multicast support. The switches support Protocol-Independent Multicast (PIM), Source-Specific Multicast (SSM), and Bidirectional PIM (bidir-PIM), providing end users with additional scalability to support multimedia applications. Also supported are Internet Group Management Protocol (IGMP) snooping and Multicast Listener Discovery (MLD) snooping in hardware, enhancing performance and reducing network traffic by allowing a switch to dynamically add and remove hosts from a multicast group.

    Intelligent Network Services with QoS and Sophisticated Traffic Management

    The Cisco Catalyst 4948E and 4948E-F offer superior per-port QoS features to help ensure that network traffic is classified, prioritized, and scheduled optimally to efficiently manage bandwidth-intensive multimedia and time-sensitive and mission-critical applications. The Cisco Catalyst 4948E and 4948E-F can classify, monitor, and mark incoming packets, allowing the administrator to differentiate traffic flows and enforce policies. Sharing, shaping, and strict-priority configurations determine the scheduling of egress traffic. The Cisco Catalyst 4948E and 4948E-F also support DBL, a congestion-avoidance feature. For details about the QoS features, including active queue management through DBL on the Cisco Catalyst 4948E and 4948E-F, refer to the Cisco Catalyst 4500 Series Supervisor Engine QoS overview at

    Cisco Catalyst 4900 Series Features

    Table 1 summarizes the main features of the Cisco Catalyst 4900 Series Switches.

    Table 1. Main Features of Cisco Catalyst 4900 Series Switches

    Feature and Description

    Cisco Catalyst 4948 Switch

    Cisco Catalyst 4948 10 Gigabit Ethernet Switch

    Cisco Catalyst 4900M Switch

    Cisco Catalyst 4948E and 4948E-F Switches







    Dimensions (H x W x D)

    1.71 x 17.3 x 16.1 in. (4.3 x 43.9 x 40.9 cm)

    1.71 x 17.3 x 16.1 in. (4.3 x 43.9 x 40.9 cm)

    3.5 x 17.2 x 17.9 in. (8.9 x 43.7 x 45.5 cm)

    1.75 x 17.5 x 19.4 in. (4.4 x 44.4 x 49.3 cm)

    Power redundancy

    1+1 AC or DC

    1+1 AC or DC

    1+1 AC or DC

    1+1 AC or DC

    Unit weight

    16.5 lb (7.48 kg)

    16.5 lb (7.48 kg)

    34.0 lb (15.4 kg)

    19 lb (8.62 kg)

    Hot-swappable fan





    Average and maximum power consumption (in watts [W])

    176W average

    300W maximum

    212W average

    300W maximum

    300W average

    446W maximum

    230W average

    275W maximum


    Side to back

    Side to back

    Side to back

    Front to back (Cisco Catalyst 4948E)

    Back to front (Cisco Catalyst 4948E-F)

    Rack-mounting options

    Front and rear mount

    Front and rear mount

    High-performance rear mount

    Four-post rack-side rail mount

    High-performance mount

    Front and rear mount

    High-performance rear mount

    Uplink optic types

    Four Small Form-Factor Pluggable (SFP) optics

    Two X2 (10 Gigabit Ethernet) optics

    Eight X2 (10 Gigabit Ethernet) optics

    SFP and SFP+

    Cisco® TwinGig Converter Module support



    Yes (WS-X4908-10GE only)


    Cisco OneX Converter Module support (X2 to SFP+)






    LH, SX, ZX, and CWDM

    LR, CX4, LX4, SR, ER, LRM, ZR, and DWDM

    X2: LR, CX4, LX4, SR, ER, LRM, ZR, and DWDM

    SFP+: SR

    CWDM, DWDM, SR, LR, LRM, and CX4

    Modular half-card slots






    Maximum 10/100/1000-Gbps ports





    Maximum Gigabit Ethernet (fiber) ports



    32 (Cisco TwinGig Converter Module)


    Maximum 10 Gigabit Ethernet (10GBASE-T) ports





    Maximum 10 Gigabit Ethernet (fiber) ports


    2 (X2)

    24 (X2)*

    4 (SFP+)

    Performance and Scalability

    Switching capacity

    96 Gbps

    136 Gbps

    320 Gbps

    176 Gbps


    72 million packets per second (mpps)

    102 mpps

    250 mpps for IPv4

    125 mpps for IPv6

    131 mpps for IPv4

    110 mpps for IPv6

    Routes supported





    MAC addresses





    Per-VLAN Spanning Tree (PVST) Protocol and VLANIDs





    Spanning Tree Protocol instances





    Switched virtual interfaces (SVIs)





    Active VLANs





    Multicast routes





    Security and quality-of-service (QoS) hardware entries





    Switched Port Analyzer (SPAN)

    2 ingress and 4 egress

    2 ingress and 4 egress

    8 ingress and 8 egress

    8 ingress and 8 egress

    Shared buffer

    16 MB

    16 MB

    17.5 MB

    17.5 MB


    266 MHz

    666 MHz

    1.3 GHz

    1 GHz

    Synchronous dynamic RAM (SDRAM)

    256 MB

    256 MB

    512 MB

    1 GB

    Multilayer switching

    LAN Base, IP Base, and Enterprise Services options

    LAN Base, IP Base, and Enterprise Services options

    LAN Base, IP Base, and Enterprise Services options

    LAN Base, IP Base, and Enterprise Services options

    IPv6 support

    Software switched

    Software switched

    Hardware switched

    Hardware switched

    USB port





    Compact flash memory support





    System reset button





    Minimum software requirements

    Cisco IOS®Software Release 12.2(20)EWA or later

    Cisco IOS Software Release 12.2(25)EWA or later

    Cisco IOS Software Release 12.2(46)SG or later

    Cisco IOS Software Release 12.2(54)SG or later (Cisco Catalyst 4948E)

    Cisco IOS Software Release 12.2(54)WO orlater (Cisco Catalyst 4948E-F)

    * X2 can be converted to SFP+ using the Cisco OneX Converter Module.

    Supported Small Form-Factor Pluggable Optics and Copper Media

    The Cisco Catalyst 4948E and 4948E-F supports 10 Gigabit Ethernet SFP and SFP+ on all the four uplinks. For more information about Cisco transceiver modules compatible with the Cisco Catalyst 4948E and 4948E-F, visit

    Switch Indicators and Ports

    ● System status: Green (operational) or red (faulty)

    ● Console: RJ-45 socket

    ● Reset (switch recessed for protection)

    ● Uplinks: Link and active

    ● Image management port: 10/100/1000BASE-TX (RJ-45 socket) data terminal equipment (DTE); green (good), orange (disabled), or off (not connected)

    Physical and Environmental Characteristics

    Table 2 lists the physical and environmental characteristics of the Cisco Catalyst 4948E and 4948E-F switches.

    Table 2. Physical and Environmental Characteristics




    Operating temperature

    32 to 104°F (0 to 40°C)

    Storage temperature

    -40 to 167°F (-40 to 75°C)

    Relative humidity

    10 to 90%, noncondensing

    Operating altitude

    -196 to 6561 ft (-60 to 2000m)

    Mean time between failure (MTBF)

    ● Cisco Catalyst 4948E-F : 149,261 hours
    ● Cisco Catalyst 4948E: 145,422 hours


    ● 28 cubic feet per minute (CFM) at low speed
    ● 44 CFM at full speed




    1.75 x 17.5 x 19.4 in. (4.4 x 44.4 x 49.3 cm)



    ● 19 lb (8.62 kg) (fully loaded with 2 power supplies and fan tray)
    ● 14 lb (6.35 kg) (base system only; no power supply or fan tray)



    AC input voltage range

    90 to 264 VAC


    DC input voltage range

    -40.5 to -72 VDC


    Maximum current

    ● AC: 4 amperes (A) at 120 VAC; 2A at 240 VAC input
    ● DC: 8A at -48 VDC input

    Typical operating power

    230W at 25°C


    Maximum power

    275W at 55°C


    RoHS compliant

    RoHS-6 compliance


    Heat dissipation (maximum)

    ● AC Input: 1173 BTU per hour
    ● DC Input: 1251 BTU per hour

    For Cisco Catalyst 4948E and 4948E-F mounting options, please refer the installation guide at

    Industry Standards

    Table 3 summarizes the supported industry standards on Cisco Catalyst 4948E and 4948E-F switches. For a detailed list of supported software features, please refer to the software release notes at

    Table 3. Industry Standards



    Industry standards

    ● Ethernet: IEEE 802.3 and 10BASE-T
    ● Fast Ethernet: IEEE 802.3u, 100BASE-TX, and 100BASE-FX
    ● Gigabit Ethernet: IEEE 802.3z and 802.3ab
    ● IEEE 802. 1D Spanning Tree Protocol
    ● IEEE 802.1w rapid reconfiguration of spanning tree
    ● IEEE 802. 1s multiple VLAN instances of spanning tree
    ● IEEE 802.3 ad LACP
    ● IEEE 802. 1p CoS prioritization
    ● IEEE 802.1Q VLAN
    ● IEEE 802. 1x user authentication
    ● RMON I and II standards

    Regulatory Standards Compliance

    Table 4 provides regulatory compliance information for the Cisco Catalyst 4948E and 4948E-F.

    Table 4. Regulatory Standards Compliance



    Regulatory compliance

    Products bear CE Marking, indicating compliance with the 89/336/EEC and 73/23/EEC directives, which include the safety and EMC standards listed here.


    ● UL 60950-1
    ● CAN/CSA-C22.2 No. 60950-1
    ● EN 60950-1
    ● IEC 60950-1
    ● AS/NZS 60950
    ● IEC 60825-1
    ● IEC 60825-2
    ● EN 60825-1
    ● EN 60825-2
    ● 21 CFR 1040


    ● FCC Part 15 (CFR 47) Class A
    ● ICES-003 Class A
    ● EN55022 Class A
    ● CISPR22 Class A
    ● AS/NZS 3548 Class A
    ● VCCI Class A
    ● EN55024
    ● ETS300 386
    ● EN50082-1
    ● EN61000-3-2
    ● EN61000-3-3

    Network Equipment Building Standards (NEBS)

    ● GR-63-Core NEBS Level 3
    ● GR-1089-Core NEBS Level 3


    ● ETS 300 019 Storage Class 1.1
    ● ETS 300 019 Transportation Class 2.3
    ● ETS 300 019 Stationary Use Class 3.1

    Warranty Information

    Find warranty information at on the Product Warranties page.

    Ordering Information

    Help customers understand all the components or parts they need to purchase to install and use the product. Table 5 lists part numbers for customer convenience. To place an order, visit the Cisco Ordering homepage. To download software, visit the Cisco Software Center at

    Table 5. Ordering Information


    Part Number



    Front-to-Back Cooling

    Back-to-Front Cooling

    48x 10/100/1000(RJ45)+4x 10GbE(SFP+), no p/s



    48x 10/100/1000(RJ45)+4x10GbE(SFP+), IP Base IOS, AC p/s



    48x 10/100/1000(RJ45)+4x10GbE(SFP+), Ent Ser IOS, AC p/s



    Green Bundle 10x WS-C4948E



    Catalyst 4948E 300WAC power supply (spare)



    Catalyst 4948E 300WAC redundant power supply



    Catalyst 4948E 300WDC power supply (spare)


    Not Available at this time

    Catalyst 4948E 300WDC redundant power supply (spare)


    Not Available at this time


    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (LAN Base image)



    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (LAN Base image with Triple Data Encryption)



    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (IP Base image)


    S49EIPB-12254WO (=)

    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (IP Base image with Triple Data Encryption)


    S49EIPBK9-12254WO (=)

    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (Enterprise Services image with BGP support)



    Cisco IOS Software for Cisco Catalyst 4948E Series Switches (Enterprise Services image with 3DES and BGP support)



    Catalyst 4948 IP Base Upgrade License for LAN Base IOS




    Cisco Catalyst 4948E spare fan tray rear exhaust



    Power Cables

    AC Power cord, 110V North America, Japan


    AC Power cord, 220V North America


    AC Power cord (Australia, New Zealand)


    AC Power cord (Europe)


    AC Power cord CD12 (Italy)


    AC Power cord (Argentina)


    AC Power cord (South Africa, India)


    AC Power cord (United Kingdom)


    AC Power cord (Switzerland)


    Cisco Services

    Cisco Technical Support Services helps ensure that your Cisco products operate efficiently, remain highly available, and benefit from current system software to help you effectively manage your network services while controlling operating costs.

    Cisco Technical Support Services (Table 6) provides significant benefits that go beyond what is offered under the Cisco warranty policy. Services available under a Cisco SMARTnet® service contract that are not covered under a warranty include the following:

    ● Latest software updates

    ● Rapid replacement of hardware with next-day, 4-hour, or 2-hour dispatch options

    ● Ongoing technical support through the Cisco Technical Assistance Center (TAC)

    ● Registered access to

    Table 6. Cisco Technical Support Services Components



    Software support

    Software support offers maintenance and minor and major updates for licensed feature sets. Downloading new maintenance releases, patches, or updates of Cisco IOS Software helps enhance and extend the useful life of Cisco devices. Through major software updates, organizations can extend the life of equipment and get the most from application technology investments by:

    ● Adding new functions that, in many cases, require no additional hardware investment
    ● Increasing the performance of current functions
    ● Enhancing network or application availability, reliability, and stability

    Cisco TAC support

    With more than 1000 highly trained customer support engineers, 390 Cisco Certified Internetwork Expert (CCIE®) experts, and access to 13,000 research and development engineers, Cisco TAC complements your in-house staff with a high level of knowledge about data, voice, and video communications networking technology. Its sophisticated call-routing system quickly routes calls to the correct technology personnel. Cisco TAC is available 24 hours a day, 365 days a year.

    This award-winning website provides 24-hour access to an extensive collection of online product and technology information, interactive network management and troubleshooting tools, and knowledge-transfer resources that can help customers reduce costs by increasing staff self-sufficiency and productivity.

    Advance hardware replacement

    Advance replacement and onsite field engineer options supply fast access to replacement hardware and field resources for installing hardware, reducing the risk of potential network downtime.

    Smart Call Home

    Cisco Smart Call Home is a proactive, connected service capability of Cisco SMARTnet Service that is available at no additional cost on Cisco Catalyst 4500 Series Switches. Smart Call Home devices can continuously monitor their own health using Cisco Generic Online Diagnostics (GOLD) technology and automatically notify you of potential problems using secure transmissions. If a serious problem arises, Smart Call Home automatically detects it and generates a Cisco TAC service request that is routed to the team appropriate for a particular problem.

    Additional Information

    SKU WS-C4948E-RF
    Weight (Kg) 1
    Datasheet URL
    Condition Refresh
    Switch Series 4900 Series
    Device Type Fixed
    Power Rating N/A
    Number of Access Ports 48
    Access Port Speed 1 Gbps
    Number of Uplink Ports 4
    Uplink Ports Speed 10 Gig
    PoE Ports Non PoE
    Rack Mountable Yes
    Stackable Yes



    AED 0