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WS-C4948-10GE-S
Cisco WS-C4948-10GE-S Catalyst 4948-10GE 48-Port Gigabit Swi...
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WS-C4948-10GE-S is a managed Layer 3 server switch with 48 Gigabit Ethernet copper ports and two fixed 10G X2 uplink interfaces. The non-PoE configuration connects separately powered servers and workstations, while the 1U chassis accommodates rack-based aggregation. Catalyst 4948-10GE combines IP Base routing with Layer 2 VLAN connectivity, retaining a fixed port layout rather than expandable line-card capacity. The discontinued WS-C4948-10GE-E differs by including Enterprise Services for enhanced routing. Within the Catalyst 4900 family, this configuration serves existing Gigabit server environments where copper connection speed, optical interface format and software-image compatibility determine the replacement order. Native X2 interfaces are an important distinction when matching the equipment already installed at the other end of an uplink.
WS-C4948-10GE-S price for new stock is $7,607.25. WS-C4948-10GE-S refurb price is $157.48. WS-C4948-10GE-S is in stock and available for free next-day delivery. (terms applied)
Request bulk order quote for WS-C4948-10GE-S for additional pricing. Browse the full Cisco 4900 Catalyst Switches series or explore all Cisco products.
136 Gbps switching capacity provides the switching fabric for simultaneous access and uplink traffic. 102 Mpps forwarding supports hardware switching and IPv4 forwarding without substituting a bandwidth figure for packet throughput. RIPv1, RIPv2, static routing and EIGRP Stub provide IP Base routing; OSPF for routed access is available with compatible software, including a 200-dynamically-learned-route limit under IOS 15.0(2)SG. BGP, IS-IS and full EIGRP require Enterprise Services. WS-C4948-10GE-S carries 256 MB DRAM and 64 MB flash, while a 16 MB shared packet buffer handles queued traffic. The 55000-entry unicast MAC table supports address learning, and 32000 routing entries are shared between unicast and multicast rather than allocated independently. Four fans in the WS-X4991= fan tray cool the chassis. LACP supports link aggregation, while DHCP snooping and Dynamic ARP Inspection provide controls for access traffic. IPv6 forwarding uses software rather than a hardware forwarding path.
ORM Systems offers WS-C4948-10GE-S in new sealed and certified refurbished condition. Refurbished units are inspected and bench-tested for power-on and POST, clean boot, every port linking at rated speed, PWR-C49-300AC status and fan status; firmware is verified and configurations are wiped to factory default. Specify the condition and accessories on the PO: new units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and returns are available for 30 days on every condition, with terms applying; Cisco's original 1-year limited warranty has ended, with Cisco service ending February 28, 2018. PO orders are accepted, with Net-30 for government, RMA with advance replacement, and regional stock and RMA coverage across the UK, EU, US and MEA for enterprise and volume procurement.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS |
License Tier | IP Base |
Port Configuration | 48 x 1G / 2 x 10G X2 |
Max Power Draw | 300W |
Cooling | 4 fans |
Lifecycle Status | Sales ended February 28, 2013 / Support ended February 28, 2018 |
In a VMware ESXi cluster supporting 2,000+ VMs, the WS-C4948-10GE-S Cisco 4948 Switch acts as a leaf node, aggregating 48 Gigabit server uplinks and four 10GbE spine connections. This architecture delivers sub-microsecond latency, non-blocking 720 Gbps throughput, and seamless VM mobility—ensuring predictable performance during live migrations and peak I/O bursts.
An enterprise campus with 10 office buildings uses the WS-C4948-10GE-S Cisco 4948 Switch at each building’s telecom room to aggregate 48 edge access switches into two redundant 10GbE uplinks. Advanced QoS and jumbo-frame support guarantee jitter-free HD videoconferencing and VoIP traffic, improving collaboration uptime by 99.99% and simplifying network operations with Cisco IOS-XE automation.
A university HPC cluster running genomics analysis leverages the WS-C4948-10GE-S Cisco 4948 Switch as its core interconnect. With 720 Gbps non-blocking bandwidth and low-latency forwarding, large data sets move between 100+ compute nodes at line rate. This reduces job completion times by 40% and accelerates time-to-insight for critical scientific workloads.
When staging a replacement for an existing server switch, separate image recovery from normal data connections. A dedicated image-management interface can reload software from a TFTP server, while the console supports out-of-band access. Specify console access and an image-recovery procedure before issuing the purchase order.
When standardizing replacement units across regional sites, include the destination power cord rather than treating every AC lead as interchangeable. CAB-US515-C15-US is the 110V North American option, CAB-CEE77-C15-EU serves Europe, and CAB-BS1363-C15-UK serves the United Kingdom. Specify the appropriate cord PID against each site before the PO.
10G copper connections to servers
WS-C4948-10GE-S limits its server-facing copper ports to 10/100/1000BASE-T. The 10G interfaces are X2 uplinks, and the chassis has no expansion slots for additional access-port cards.
Hardware forwarding for IPv6 traffic
Catalyst 4948-10GE forwards IPv6 in software rather than hardware. Software-image selection does not change that forwarding architecture, so the chassis cannot satisfy a hardware-IPv6-forwarding requirement.
OSPF scale above 200 learned routes
IP Base under IOS 15.0(2)SG limits OSPF to 200 dynamically learned routes, with one OSPFv2 instance and one OSPFv3 instance. The larger shared routing-table capacity does not remove this limit.
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| WS-C4948-10GE-S |  WS-X4992 |  WS-X4920-GB-RJ45 |  WS-X4993-F |  WS-C4948E-E | |
|---|---|---|---|---|---|
| Depth | 409.956 mm | 12 inches | 12 inches | 18 inches | 492.76 mm |
| Ethernet Technology | Gigabit Ethernet | 10/100/1000 | 10/100/1000 | 10/100/1000 | Gigabit Ethernet |
| Form Factor | Rack-Mount 1U | Rack-mount | Rack-mount | Rack-mount | Rack-Mount 1U |
| Height | 44.45 mm | 3.5 inches | 1 inches | 1.75 inches | 44.45 mm |
| Manufacturer Part Number | WS-C4948-10GE-S | WS-X4992 | WS-X4920-GB-RJ45 | WS-X4993-F | WS-C4948E-E |
| Power Consumption | 300W | 200 W | 75 W | 350 W | 300W |
| Weight | 7.48 kg | 25 lbs | 15 lbs | 25 lbs | 6.35 kg |
| Width | 439.166 mm | 17.5 inches | 17 inches | 19 inches | 444.5 mm |
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New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 90 days, for dependable protection on every order. The exact term is confirmed on your quote, order confirmation and invoice.
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Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
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Reviewed on the 16 April 2019
Good value for aggregation layer.
Reviewed on the 19 February 2026
IP Base features met our routing needs.
Reviewed on the 2 June 2023
Stable 10G switching.
Reviewed on the 21 September 2021
No downtime experienced.
Reviewed on the 13 July 2021
Satisfied overall.
WS-C4948-10GE-S identifies a 48-port Catalyst 4948 configuration with two 10G uplinks and IP Base software. WS-C4948 names the switch, 10GE identifies the 10 Gigabit Ethernet X2 uplink version, and S selects the IP Base bundle. That bundle includes one PWR-C49-300AC power supply and a WS-X4991= fan tray.
WS-C4948-10GE-S supports console CLI, SSH, Telnet, SNMP, Cisco Network Assistant, CiscoWorks LMS and CiscoWorks CiscoView management. CiscoView provides web-based device management, while a terminal or modem connected to the console provides out-of-band access. SNMP supports versions 1, 2 and 3; specify the management method and credentials during staging.
WS-C4948-10GE-S reached end of sale on February 28, 2013, and its last date of Cisco support was February 28, 2018. WS-C4948E-S and WS-C4948E-F-S succeeded this model, but both are also discontinued. The subsequent migration family is Catalyst 9500, rather than either older 4948E replacement.
ORM Systems offers WS-C4948-10GE-S new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units. Returns are available for 30 days on every condition; terms apply. Cisco's original 1-year limited hardware warranty has ended; Cisco service ended February 28, 2018.
WS-C4948-10GE-S includes IP Base; Catalyst 4948-10GE also supports LAN Base and Enterprise Services image options. LAN Base focuses on Layer 2, while IP Base provides limited routing and Enterprise Services adds enhanced routing. Specify the image and any required software upgrade on the quote; matching the chassis alone does not confirm identical routing features.
WS-C4948-10GE-S uses two fixed 10G X2 uplink interfaces. X2-10GB-SR supports multimode fiber over 26 to 300 m, depending on fiber type, while X2-10GB-LR supports single-mode fiber over 10 km. Specify compatible X2 optics and match the fiber, connector arrangement and required reach at both link ends before ordering.
Yes, WS-C4948-10GE-S supports 1+1 internal power redundancy, but the bundle includes only one PWR-C49-300AC. Add PWR-C49-300AC/2 for a second AC supply and connect the supplies to separate circuits for A-to-B failover. Compatible AC and DC supplies can also operate together; PWR-C49-300DC is the DC supply option.
WS-C4948-10GE-S provides 136 Gbps switching capacity and 102 Mpps forwarding, with a 55000-entry unicast MAC table. The routing table supports 32000 entries shared between unicast and multicast. Treat that shared total as a planning limit, rather than allocating 32000 entries independently to each traffic type.
No, Catalyst 4948-10GE handles IPv6 forwarding in software rather than hardware. The hardware-forwarding performance figures therefore should not be treated as an IPv6 throughput commitment. Changing the software image does not add a hardware IPv6 forwarding path; account for that architectural limit when defining acceptance requirements.
WS-C4948-10GE-S includes IP Base, whereas WS-C4948-10GE-E includes Enterprise Services with BGP, IS-IS and full EIGRP. Both models are discontinued. The S bundle suits like-for-like IP Base maintenance; the E bundle corresponds to existing deployments requiring enhanced routing features rather than the more limited IP Base feature set.
WS-C4948-10GE-S bundles one PWR-C49-300AC, while WS-C4948-10GE is the unbundled chassis without a power supply. Both models are discontinued. The bundled model fits a legacy replacement needing a supplied AC module; the unbundled chassis fits an existing spares arrangement where a compatible power supply is already available.
Catalyst 4948-10GE is a 1U rack switch measuring 44.45 mm high, 439.166 mm wide and 409.956 mm deep, weighing 7.48 kg with one PWR-C49-300AC. C4948-ACC-KIT= provides spare rack-mount and cable-guide hardware. Specify the mounting hardware and check chassis clearance before installing a replacement in an existing rack.
Yes, WS-C4948-10GE-S supports OSPF for routed access with IP Base on compatible software, including IOS 15.0(2)SG. That release permits one OSPFv2 instance and one OSPFv3 instance with a maximum of 200 dynamically learned routes. Confirm the installed IOS version rather than assuming every historical IP Base image provides identical OSPF functionality.
Catalyst 4948-10GE provides four queues per port, strict-priority queuing and 512 ingress plus 512 egress policers. Traffic can be marked and policed using Layer 3 and Layer 4 headers. Specify the required classification, policing and queue behavior during configuration planning rather than assuming the default settings implement the intended traffic policy.
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