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Expansion card improved flexibility of the chassis.
WS-X4992
Cisco 4900M Switch WS-X4992
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$700.00
$299.0057.3% off
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WS-X4992
Cisco 4900M Switch WS-X4992
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WS-X4992 is a high-performance, rack-mount switch engineered with an advanced modular architecture that supports both Layer 2 and Layer 3 functionalities. It offers flexible power options with redundant AC power supplies, a diverse array of ports including combo Ethernet and uplink configurations of up to 10G, and robust stacking capabilities that ensure seamless scalability and exceptional overall performance for data-intensive environments.
WS-X4992 is designed for enterprise applications where high reliability and efficient network management are paramount. Its extensive port options, including 12 SFP ports and 24 dedicated downlink ports, complement a modular design that facilitates easy expansion and stacking, catering to varied use cases from campus networks to mission-critical data centers while delivering optimal throughput and energy efficiency.
WS-X4992 price is $299.00, a 57.3% saving from the Cisco list price of $700.00. WS-X4992 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for WS-X4992 for additional pricing. Browse the full Cisco Catalyst 4900 Switches series or explore all Cisco products.
In a virtualized data center with 200+ hypervisor hosts, the WS-X4992 module on a Cisco 4900M delivers 48 non-blocking 1GbE ports plus four 10GbE uplinks for Top-of-Rack switching. By consolidating server traffic at wire-speed and enabling Hot-Standby Router Protocol (HSRP) for seamless failover, IT teams achieve sub-microsecond latency, 99.999% uptime, and simplified VLAN management—boosting VM migration performance and reducing rack-level cabling complexity.
In a multi-building corporate campus connecting 3,000 users and IP telephony endpoints, deploying the WS-X4992 in Cisco Catalyst 4900M chassis centralizes access-layer uplinks. Integrated hardware QoS, 802.1Q trunking and Link Aggregation Control Protocol (LACP) ensure voice/video priority and automatic load balancing. The result: consistent MOS >4.0 for VoIP calls, 50% faster failover times under spanning tree reconvergence, and a single-pane-of-glass for security policy enforcement.
An ISP delivers business-class Metro Ethernet to 50 SMB and enterprise customers over fiber rings. Installing the WS-X4992 in a Cisco 4900M node enables VRF-Lite segmentation, private VLANs, and ACL-based edge security on 48 customer ports. Four dedicated 10GbE uplinks connect to the provider backbone. This architecture guarantees SLA-driven bandwidth isolation, mitigates east-west traffic breaches, and simplifies on-demand service provisioning—driving 30% lower operational expenditure and strong compliance with data-segregation mandates.
To get the detailed certification, please go to the Compliance Center.
 WS-X4992 |  WS-X4908-10GE |  WS-C4948-10GE |  WS-C4928-10GE |  WS-C4948-S | |
|---|---|---|---|---|---|
| Depth | 12 inches | N/A | 18 inches | 18 inches | 18 inches |
| Ethernet Technology | 10/100/1000 | 10 Gigabit Ethernet | 10/100/1000 | 10/100/1000 | 10/100 |
| Flash Memory | 256 MB | N/A | 64 MB | 64 MB | 32 MB |
| Form Factor | Rack-mount | Chassis | Rack-mount | Rack-mount | Rack-mount |
| Height | 3.5 inches | N/A | 1.75 inches | 1.75 inches | 1.75 inches |
| IOS | IP Services | IP Services | LAN Lite | IP Services | LAN Lite |
| Interface Ports | 10/100/1000 | N/A | 10/100/1000 | 10/100/1000 | 10/100 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | WS-X4992 | WS-X4908-10GE | WS-C4948-10GE | WS-C4928-10GE | WS-C4948-S |
| Media Type Supported | Combo | Fiber | Twisted Pair / Fiber | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber |
| Memory | 512 MB | N/A | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 8 Ports | 24–48 Ports | 48 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | Under 12 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | POE+ | Non POE | Non POE | Non POE | Non POE |
| Port/Expansion Slot Details | 4 expansion slots available | N/A | 48 × 10/100/1000 Ethernet ports and 4 × 10GE SFP+ uplink ports | 48 fixed Ethernet ports with 4 integrated 10GE uplink ports | N/A |
| Power Consumption | 200 W | N/A | 350 W | N/A | N/A |
| Power Source | Redundant Power Supply / AC Power Supply | Redundant Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply |
| Product Name | WS-X4992 High-Performance Stacked Switch | Cisco Catalyst WS-X4908-10GE 10 Gigabit Ethernet Module | Cisco Catalyst 4948-10GE | Cisco Catalyst 4928-10GE Switch | Cisco Catalyst 4948-S Switch |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 2 RU | N/A | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | No |
| SFP Ports | 12 SFP Ports | N/A | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 320 Gbps | N/A | 176 Gbps | 128 Gbps | 32 Gbps |
| Switching Capacity with Stacking | 640 Gbps | N/A | 352 Gbps | 256 Gbps | 64 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 1G |
| Weight | 25 lbs | N/A | 25 lbs | 25 lbs | 16 lbs |
| Width | 17.5 inches | N/A | 19 inches | 17.5 inches | 19 inches |
Expansion card improved flexibility of the chassis.
Stable and compatible.
No errors observed.
Good addition.
Satisfied overall.
The Cisco WS-X4992 is a 48-port 10/100/1000 Gigabit Ethernet switch module with four SFP uplink ports designed for the Catalyst 4900M chassis, delivering high-density Gigabit connectivity and advanced Layer 2 switching capabilities.
The WS-X4992 offers 48 fixed 10/100/1000BASE-T Ethernet ports plus four dedicated SFP uplink ports that support 1000BASE-SX/LX fiber connectivity.
The WS-X4992 is exclusively compatible with the Cisco Catalyst 4900M Modular Switch chassis, supporting up to three line cards per chassis for flexible deployment.
WS-X4992 includes four SFP uplink ports that support 1000BASE-SX, 1000BASE-LX, and Cisco SFP fiber transceivers for versatile fiber or copper uplink configurations.