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WS-C4948
Cisco WS-C4948 Catalyst 4948 48-Port Gigabit Switch, 4x1G SF...
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WS-C4948 provides fixed-configuration Gigabit server switching with 48 10/100/1000BASE-T copper ports and four alternatively wired 1G SFP interfaces. The Catalyst 4948 operates at Layer 2 with the default LAN Base image and does not supply PoE to attached devices. Its rack-optimized chassis belongs to the Catalyst 4900 family and targets servers and workstations rather than powered access endpoints. The configurable base allows software and power components to be selected instead of imposing a bundled configuration. Discontinued WS-C4948-S included one AC power supply, unlike this separately configured chassis. Fiber connections use the built-in SFP interfaces rather than an expansion card, and the copper and fiber connections share the switch's active-port allowance.
WS-C4948 price for new stock is $5,071.50. WS-C4948 refurb price is $103.95. WS-C4948 is in stock and available for free next-day delivery. (terms applied)
Request bulk order quote for WS-C4948 for additional pricing. Browse the full Cisco 4900 Catalyst Switches series or explore all Cisco products.
96 Gbps switching capacity provides the fabric for the supported active-port configuration. 72 Mpps forwarding handles hardware Layer 2 traffic across the switching interfaces. WS-C4948 combines 256 MB of DRAM with 6 MB of flash for its Cisco IOS software environment. A 16 MB shared packet buffer and four hardware queues per port provide congestion-handling resources, while LACP supports link aggregation. The switch accommodates 32768 MAC addresses, and jumbo frames reach 9216 bytes. Remote administration includes SSH and Telnet, with SNMP available for monitoring; the dedicated management port serves image recovery rather than ordinary access connectivity. Cooling uses four redundant fans in the WS-X4991= fan tray, and installation planning must allow operation from 0°C to 40°C. No USB port is provided for local removable storage.
WS-C4948 is offered new sealed or certified refurbished, with ORM coverage of up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units; returns run for 30 days on every condition, terms apply. Certified refurbished units are inspected and bench-tested for power-on, POST, rated-speed port links, optics recognition, PSU and fan status, and clean boot, with firmware verified and configurations wiped to factory default. Specify condition and included components on the PO; Cisco's original 1-year limited hardware warranty and service ended July 31, 2018. ORM accepts POs, provides Net-30 for government and RMA with advance replacement, and handles regional stock and RMA across the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS |
License Tier | LAN Base default; software selectable |
Port Configuration | 48 x 1G copper / 4 x 1G SFP |
Cooling | 4 redundant fans / WS-X4991= |
Ships Without | Power supply; software selected separately |
Lifecycle Status | Discontinued; Cisco support ended July 31, 2018. |
Scenario: Large enterprise data centers require low-latency, high-throughput 10GbE uplinks for server farms. The WS-C4948 Cisco 4948 Switch delivers 48 line-rate Gigabit ports plus four native 10GbE SFP+ slots, enabling consolidated top-of-rack aggregation with wire-speed forwarding. Benefit: Simplifies rack-level architecture, reduces latency by up to 30%, and scales seamlessly to support growth in virtualized workloads and East-West traffic.
Scenario: Education and corporate campuses demand high-density Gigabit access for VoIP, video and wireless backhaul. The Cisco 4948 Switch (WS-C4948) provides resilient stacking, advanced QoS and 48 RJ-45 ports to power PoE devices and large user populations. Benefit: Ensures consistent application performance, simplifies network segmentation with VLANs, and cuts operational expenses by centralizing management and reducing hardware footprint.
Scenario: Virtualized server farms and HPC clusters require predictable bandwidth and ultra-low jitter for compute-intensive workloads. The WS-C4948 Cisco 4948 Switch offers non-blocking architecture and IEEE 802.3ad link aggregation for up to 40Gbps of aggregated uplink capacity. Benefit: Delivers deterministic performance for VM migrations, accelerates data-intensive computing tasks, and supports high-availability designs with redundant uplinks and rapid failover.
An existing server installation needs another switch with the same VLAN structure rather than a change in connection speeds. WS-C4948 supports 4096 active VLANs, allowing the proposed configuration to be matched against the existing segmentation plan. Specify the VLAN requirements and selected software image before issuing the purchase order.
An engineering team needs a staging unit to reproduce traffic-mirroring behavior before changing a production configuration. LAN Base provides two SPAN sessions, so the test plan must fit that session allowance. Record the required image and mirroring arrangement on the purchase order rather than assuming the IP Base session count.
An installed estate needs a compatible cold spare rather than a new switching design. The fan assembly can be matched against the WS-X4991= spare, while the proposed order can be checked against the existing power arrangement. Specify condition, included components, and the intended replacement configuration before the purchase order is approved.
52 concurrent switching connections
WS-C4948 activates a maximum of 48 switching ports across its copper and fiber interfaces. Four active SFP connections consume that allowance rather than creating 52 simultaneously usable links.
10G fiber uplinks
WS-C4948 provides four 1G SFP interfaces and no 10G ports. Its fixed uplink architecture cannot accept a removable 10G uplink card.
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| WS-C4948 |  WS-X4908-10GE |  WS-X4992 |  WS-C4900M |  WS-X4993-F | |
|---|---|---|---|---|---|
| Ethernet Technology | Gigabit Ethernet | 10 Gigabit Ethernet | 10/100/1000 | 10 Gigabit Ethernet | 10/100/1000 |
| Form Factor | Rack-Mount 1U | Chassis | Rack-mount | Rack-Mount 2U | Rack-mount |
| Manufacturer Part Number | WS-C4948 | WS-X4908-10GE | WS-X4992 | WS-C4900M | WS-X4993-F |
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Reviewed on the 9 February 2024
Dependable gigabit switch for enterprise networks.
Reviewed on the 5 April 2018
Handled daily traffic smoothly.
Reviewed on the 12 January 2018
Stable and predictable.
Reviewed on the 3 March 2025
Good long term reliability.
Reviewed on the 16 September 2019
Satisfied with performance.
WS-C4948 identifies the configurable Cisco Catalyst 4948 chassis rather than a software-and-power bundle. The 4948 identifier names the model; this PID has no suffix committing the order to IP Base or Enterprise Services. Software and power supplies are separate selections, while the fan tray is included.
Catalyst 4948 switches support console access, remote CLI through SSH or Telnet, SNMP, Cisco Network Assistant, and web-based CiscoWorks management with CiscoView. The dedicated management port handles image recovery through TFTP rather than ordinary production switching. Specify the required software image and management tooling before staging the order.
WS-C4948 offers LAN Base by default, with optional IP Base and Enterprise Services images. IP Base adds static routing, RIPv1, RIPv2, and EIGRP Stub; Enterprise Services adds OSPF, EIGRP, IS-IS, and BGP. WS-C4900-SW-LIC upgrades LAN Base to IP Base. Specify the licensed image on the purchase order.
No, WS-C4948 permits only 48 active switching ports across its 48 copper connectors and four SFP interfaces. The fiber interfaces are alternatively wired connections, not four additional independent active ports. A connection plan must fit the shared active-port ceiling before copper and fiber assignments are finalized.
Catalyst 4948 supports GLC-SX-MM= for SX fiber connections, GLC-LH-SM= for LH connections, and GLC-ZX-SM= for ZX connections. These are Gigabit Ethernet SFP choices with LC connectors. Select the transceiver for the fiber type and connection requirements; the built-in interfaces do not support 10G SFP+ operation.
No, WS-C4948 requires its power supplies to be selected separately. PWR-C49-300AC provides AC input and PWR-C49-300DC provides DC input. The chassis operates with one installed supply and supports a second for redundancy, including a mixed AC/DC arrangement. Confirm the installed components on the order rather than assuming a bundled supply.
Yes, WS-C4948 reached end of sale on August 1, 2013, and Cisco support ended July 31, 2018. WS-C4948E and WS-C4948E-F were its replacement models, but both are also discontinued and passed their final support date on October 31, 2022. Catalyst 9300 and Catalyst 9500 are later migration options.
New sealed and certified refurbished WS-C4948 units carry ORM warranties of up to 3-year extended coverage and up to 1 year, respectively. Returns are available for 30 days on every condition; terms apply. Cisco's original 1-year limited hardware warranty no longer provides coverage because Cisco service ended July 31, 2018.
WS-C4948-S includes one AC power supply, while WS-C4948 requires a separate power-supply selection. Both models are discontinued and have passed Cisco's final support date. The former served AC-powered bundled orders; the latter served buyers selecting power components to match an existing installation rather than accepting a bundled arrangement.
WS-C4948 has four 1G SFP interfaces, whereas WS-C4948E has four SFP+ interfaces. WS-C4948E was a replacement model, but it is also discontinued and Cisco support ended October 31, 2022. The older configuration served Gigabit fiber connections; the replacement served installations requiring the different SFP+ uplink architecture.
Catalyst 4948 uses a removable fan tray with four redundant fans, with WS-X4991= available as the spare fan tray. The operating temperature range is 0°C to 40°C. The switch is not fanless, so installation planning must accommodate active cooling rather than treating the chassis as a silent desktop unit.
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