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WS-C4948-E, Catalyst 4900 48-Port 1000Base-X (SFPs Optional) Enhanced Layer 3 image, including Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS), EIGRP, Border Gateway Protocol (BGP), AppleTalk, and Internetwork Packet Exchange (IPX) software routing; also includes all IP Base image features
The Cisco Catalyst® 4948 Switch is a wire-speed, low-latency, Layer 2 to 4, 1-rack-unit (1RU), fixed-configuration switch for rack-optimized server switching. Based Cisco® Catalyst 4500 Series hardware and software architecture, the Cisco Catalyst 4948 offers exceptional performance and reliability for low-density, multilayer aggregation of high-performance servers and workstations. High performance and scalability of intelligent network services is made possible with dedicated specialized resources known as ternary content addressable memory (TCAM). Ample TCAM resources (64,000 entries) enable high feature capacity, providing wire-speed routing and switching performance with concurrent provisioning of services such as quality of service (QoS) and security and helping ensure scalability for today's network requirements with ample room for future growth.
The Cisco Catalyst 4948 offers 48 ports of wire-speed 10/100/1000BASE-T with four alternative wired ports that can accommodate optional 1000BASE-X Small Form-Factor Pluggable (SFP) optics1. Exceptional reliability and serviceability are delivered with optional internal AC or DC 1+1 hot-swappable power supplies and a hot-swappable fan tray with redundant fans.
Performance Specification
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96 Gbps nonblocking switch fabric
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72 mpps Layer 2 forwarding (hardware)
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72 mpps Layer 3 and 4 forwarding: IP routing and Cisco Express Forwarding (hardware)
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Layer 2 to 4 hardware-based switch engine (application-specific integrated circuit [ASIC]-based)
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Unicast and multicast routing entries: 32,000
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Support for 4096 active VLANs and 4096 VLAN IDs per switch
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Layer 2 multicast addresses: 16,384
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MAC addresses: 32,768
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Policers: 512 ingress and 512 egress
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Access control list (ACL) and QoS entries: 32,000
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Uplinks: 4 alternatively wired SFP ports with Cisco Gigabit EtherChannel support
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Latency: 6 microseconds for 64-byte packets
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SVIs: 2048
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Spanning Tree Protocol instances: 1500
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Internet Group Management Protocol (IGMP) snooping entries: 8000
Get a Data Sheet: WS-C4948-E
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