- PN: WS-C4900M
- Default Ports: 8 x 10GbE X2 ports (wire-speed)
- Expansion Slots: 2
- Layer Support: Layer 2 and Layer 3 feature set
- High Availability: Redundant power and cooling, advanced QoS and security
- Forwarding Rate: 250 million packets per second (mpps)
- Top-of-Rack Data Center Switching
- Midmarket Collapsed Core and Aggregation Layer Deployments
- Flexible Migration from Gigabit to 10 Gigabit Ethernet
The Cisco Catalyst 4900M Switch is a high-performance, 2RU fixed-configuration switch designed for top-of-rack data center access and midmarket collapsed core or aggregation layer deployments. It supports both 10/100/1000 and 10GBASE-T server access with 1: 1 uplink-to-downlink oversubscription, making it ideal for mixed or full 10 Gigabit Ethernet environments. The base unit offers eight fixed wire-speed X2 ports and two optional half-card slots, delivering 320 Gbps switching capacity and 250 mpps throughput. Key features include low latency, scalable buffers, hot-swappable power supplies (AC or DC), and a field-replaceable fan tray for optimized uptime.
Targeted for space-constrained environments like branch offices or midmarket cores, the 4900M provides wire-speed Layer 3 switching, burst-handling buffer capacity, and high availability. Its semifixed architecture, combined with Cisco’s TwinGig Converter Module, allows flexible deployment of Gigabit Ethernet today with a seamless path to 10 Gigabit upgrades in the future. Designed for operational efficiency, it includes robust management tools and simplifies network operations at the aggregation and core layers.
- Port security for MAC address control
- Access Control Lists (ACLs) for traffic filtering
- Fibre Channel Security Protocol (FC-SP)
- VSAN-based access control
- Zone-based QoS and security enforcement
- Traffic isolation using VLANs and PVLANs
- DHCP snooping and dynamic ARP inspection
- Unicast Reverse Path Forwarding (uRPF)
- Secure Shell (SSH) Protocol and SNMPv3
- Fabric binding for open system security enforcement
Performance
- 320 Gbps switching capacity
- 250 million packets per second (mpps) forwarding rate
- Wire-speed performance on all ports
- Low-latency architecture optimized for data center environments
- Scalable packet buffering to handle bursty traffic
- Jumbo frame support for improved throughput
- Optional half-cards for flexible port expansion and traffic scaling
- Support for both 10/100/1000 and 10 Gigabit Ethernet
- 1: 1 uplink-to-downlink oversubscription capability
- High-availability hardware with redundant power and cooling
20-Port Wire-Speed 10/100/1000 RJ-45WS-X4920-GB-RJ45
- Ports: 20 RJ-45
- Protocol: Ethernet
- Speed: 10/100/1000 Mbps (auto-sensing)
4-Port Wire-Speed 10GbE X2WS-X4904-10GE
- Ports: 4 X2 slots
- Protocol: 10 Gigabit Ethernet
- Speed: 10 Gbps per port (wire-speed)
8-Port (2: 1) 10GbE X2WS-X4908-10GE
- Ports: 8 X2 slots
- Protocol: 10 Gigabit Ethernet
- Speed: 10 Gbps (oversubscribed 2: 1)
- Supports TwinGig Converter for Gigabit SFP use
8-Port (2: 1) 10GBASE-T RJ-45WS-X4908-10G-RJ45
- Ports: 8 RJ-45
- Protocol: 10 Gigabit Ethernet over copper
- Speed: 10 Gbps (oversubscribed 2: 1)
- Backwards compatible with 1000BASE-T