The Catalyst WS-C2948G-L3switch provides non-blocking routing and switching for IP, IPX, and IP multicast while also offering wire-speed Layer 2 switching for non-routable protocols such as NetBIOS and DECnet local-area transport (LAT). This capability allows network managers to augment their multi- protocol backbones with the Catalyst WS-C2948G-L3without having to build parallel networks, as is often required with IP-only switches.

Catalyst WS-C2948G-L3Features

• Dedicated 48 ports of 10/100-Mbps Ethernet and two ports of 1000BaseX Gigabit Ethernet with gigabit interface converter (GBIC) support; all ports with Layer 3 switching capability
• 10 Mpps Layer 3 switching and routing of IP, IPX switches, and IP multicast
• 22 Gbps non-blocking switch fabric
• High-performance CPU with Cisco IOS system software
• Quality of service (QoS)?multiple queues with weighted round robin (WRR) scheduling
• Comprehensive management tools based on standard CiscoWorks2000 applications
• Optional redundant external power supply

Catalyst WS-C2948G-L3Product overview

The Catalyst WS-C2948G-L3is a fixed-configuration Layer 3 Ethernet switch with 48 RJ-45 10/100 ports and two Gigabit Ethernet uplink ports with modular GBIC interfaces. The switch is ideal for backbone deployment in small to mid-sized networks that require wire-speed Layer 3 performance but do not require the high 10/100 Mbps Ethernet port counts or Gigabit Ethernet density offered in the Catalyst 6000 and Catalyst 8500 series of switches.
Catalyst WS-C2948G-L3Overview

The Catalyst WS-C2948G-L3provides an aggregate throughput of more than 10 Mpps for Layer 3 switching. These data rates apply not only to IP and IPX traffic but also to IP multicast and bridged traffic and are a result of using high-speed application-specific integrated circuit (ASIC) technology on each port to perform true Layer 3 switching. The Catalyst WS-C2948G-L3supports a high-performance architecture with 22 Gbps bandwidth. The switch fabric is capable of supporting all 48 10/100 ports and two Gigabit uplinks simultaneously at wire speed.

The Catalyst WS-C2948G-L3is housed in a 1.5 rack unit (RU) chassis and can be provisioned with an optional external redundant power supply. It supports a 22 Gbps shared-memory, fully non-blocking switch fabric, high- performance RISC processor that provides the routing intelligence and individual port-based ASICs for the Layer 3 switching. The Catalyst WS-C2948G-L3uses Cisco Express Forwarding (CEF), which has been developed for the Cisco 12000 series gigabit switch router (GSR), the Catalyst 8500, and the Cisco 7500. This technology provides Layer 3 switching based on a topology map of the entire network that is distributed to each port-based ASIC, allowing it to make autonomous switching decisions without the involvement of a centralized CPU.

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