Cisco Catalyst 4948 User Manual

Contents at a Glance
Introduction xviii
Chapter 1 CLI Usage 1
Chapter 2 Switch Functionality 13
Chapter 3 Supervisor Engine Configuration 25
Chapter 4 Layer 2 Interface Configuration 53
Chapter 5 Layer 3 Interface Configuration 71
Chapter 6 VLANs and Trunking 87
Chapter 7 Spanning Tree Protocol (STP) 111
Chapter 8 Configuring High Availability Features 131
Chapter 9 Multicast 141
Chapter 10 Server Load Balancing (SLB) 147
Chapter 11 Controlling Traffic and Switch Access 167
Chapter 12 Switch Management 193
Chapter 13 Quality of Service 221
Chapter 14 Voice 249
Appendix A Cabling Quick Reference 263
Appendix B Well-known Protocol, Port, and Other Numbers 271
Index 317
viii Cisco LAN Switching Configuration Handbook
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Cisco Catalyst 4948 Specifications

General

Switching Capacity	136 Gbps
Forwarding Rate	102 Mpps
Rack Units	1U
MAC Address Table Size	32, 000 entries
Authentication Method	RADIUS, TACACS+
RAM	256 MB
Flash Memory	64 MB
Power Device	Internal power supply
Voltage Required	100-240 VAC
Weight	16.5 lbs
Operating Humidity	10% to 85% non-condensing
Ports	48 x 10/100/1000
Power Supply	Internal
Layer Support	Layer 3
Jumbo Frame Support	Yes (up to 9216 bytes)
Routing Protocol	RIP, OSPF, EIGRP, BGP
Remote Management Protocol	SNMP, Telnet, SSH
Features	VLAN support, QoS
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.1Q, IEEE 802.1p
Operating Temperature	32 °F to 104 °F (0 °C to 40 °C)