Cisco 4948 Series User Manual

All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.
Page 1 of 1
Data Sheet
Cisco Catalyst 4948 Series Switch
High-Performance, Rack-Optimized Server Switching
PRODUCT OVERVIEW
The Cisco
®
Catalyst
®
4948 is a wire-speed, low-latency, Layer 2–4, 1 rack unit (RU) fixed-configuration switch for rack-optimized server switching.
Based on the proven Cisco Catalyst 4500 Series hardware and software architecture, the Cisco Catalyst 4948 Series offers exceptional performance
and reliability for low density, multilayer aggregation of high performance servers and workstations.
The Cisco Catalyst 4948 offers 48 ports of wire-speed 10/100/1000BASE-T with 4 alternative wired ports that can accommodate optional
1000BASE-X Small Form-Factor Pluggable (SFP) optics*. 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 (refer to Figures 1 and 2).
Figure 1. Cisco Catalyst 4948 Series Switch
Figure 2. Rear View of Cisco Catalyst 4948 with Dual Redundant Power Supplies and Removable Fan Tray
KEY FEATURES AND BENEFITS
Wire-Speed Performance for 10/1 00/1 000 Connectivity
The Cisco Catalyst 4948 delivers wire-speed throughput with low latency for data-intensive applications using a 96 Gbps switching fabric with a
72 Mpps forwarding rate in hardware for Layer 2–4 traffic. Switching performance is guaranteed regardless of the number of route entries or
Layer 3 and 4 services enabled. Hardware-based Cisco Express Forwarding routing architecture allows for increased scalability and performance.
* The Cisco Catalyst 4948 has 52 physical switching ports (48 10/100/1000 and 4 SFP) on the front panel. Up to 48 of these ports can be active at one time in
any combination.

Cisco 4948 Series Specifications

General

Rack Units	1U
Model	Cisco Catalyst 4948
Ports	48
Uplink Ports	4 x 10 Gigabit Ethernet
Layer Support	Layer 2
MAC Address Table Size	32000 entries
Jumbo Frame Support	9216 bytes
Routing Protocol	RIP, OSPF, BGP, EIGRP, HSRP, VRRP
Remote Management Protocol	SNMP, Telnet, SSH, HTTP, HTTPS
Authentication Method	RADIUS, TACACS+
Features	Quality of Service (QoS), Access Control Lists (ACLs), VLAN support, Port Security, DHCP Snooping
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.3ab, IEEE 802.3x
Weight	7.7 kg
Operating Temperature	0 °C to 40 °C
Operating Humidity	10% to 85% non-condensing

Summary

Product Overview

Product Description

Details the Cisco Catalyst 4948 as a wire-speed, low-latency, Layer 2-4 switch for rack-optimized server switching.

Key Features and Benefits

Highlights wire-speed performance, reliability, and serviceability of the switch.

Software Configuration Options

Technical Specifications

Performance and Switching Specs

Details switching fabric, forwarding rates, latency, and capacity metrics for the switch.

Layer 2 Features

Lists Layer 2 protocols and features supported, including VLANs, STP, and EtherChannel.

Layer 3 Features

Encompasses Layer 3 routing protocols, IP multicast, VRF-lite, and IPv6 support.

QoS and Traffic Management

Covers per-port QoS, queuing, classification, marking, and policing features.

Predictable Performance

Details performance metrics like switching fabric, forwarding rates, and MAC address support.

Comprehensive Management

Describes management tools, SNMP, CLI, RMON, SPAN, and DHCP client features.

Advanced Security Features

Details security mechanisms like NAC, 802.1x, ACLs, SSH, SCP, and port security.

Switch Architecture Specs

Covers packet buffering, CPU speed, memory, and RAM specifications.

Management Features List

Lists various MIBs and management solutions like CiscoWorks and CiscoView.

Industry Standards Support

Details supported industry standards for Ethernet, VLANs, Spanning Tree, and EtherChannel.

Port and Indicator Specifications

Describes fan, power supply, system status indicators, and console/SFP port types.

Supported SFPs

Lists the various Small Form-Factor Pluggable (SFP) transceivers supported by the switch.

Power Supply Specifications

Details AC and DC power supply options and their specifications.

Switch Dimensions and Software

Provides switch dimensions and minimum software requirements for operation.

Environmental Conditions

Specifies operating and storage temperature, humidity, and altitude limits.

Regulatory Standards Compliance

Cisco IOS Software Packaging

Warranty Information

Technical Support Services

For More Information