Cisco Catalyst 4948 User Manual

Dedications
Steve McQuerry: This work is dedicated to my wife and children. Becky, thank you for
your love and support as we continue our life together; I look forward to each new chap-
ter we write together. Katie, you are an amazing young lady. I’m excited for all that life
has in store for you; keep your work ethic, and you will be successful. Logan, you have
never believed that there was anything you couldn’t accomplish. That drive and spirit will
allow you opportunities beyond your imagination. Cameron, you have a thirst for learn-
ing that will serve you well. Keep finding ways to channel your quest for knowledge, and
you will have a challenging and rewarding future.
David Jansen: This book is dedicated to my loving wife Jenise and my three children;
Kaitlyn, Joshua, and Jacob. You are the inspiration that gave me the dedication and deter-
mination to complete this project. Thank you for all your love and support.
Dave Hucaby: This book is dedicated to my wife Marci and my two little daughters,
Lauren and Kara. For girls who have never seen a Catalyst switch, they sure encouraged
me to keep at the writing I enjoy. I’m so grateful to God, who gives endurance and
encouragement (Romans 15:5) and who has allowed me to work on projects such as this.
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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)