Cisco 2950 - Catalyst Switch User Manual

Contents
xv
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Specifying the Link Type to Ensure Rapid Transitions 15-22
Restarting the Protocol Migration Process 15-22
Displaying the MST Configuration and Status 15-23
CHAPTER 16 Configuring Optional Spanning-Tree Features 16-1
Understanding Optional Spanning-Tree Features 16-1
Understanding Port Fast 16-2
Understanding BPDU Guard 16-2
Understanding BPDU Filtering 16-3
Understanding UplinkFast 16-3
Understanding Cross-Stack UplinkFast 16-5
How CSUF Works 16-5
Events that Cause Fast Convergence 16-7
Limitations 16-7
Connecting the Stack Ports 16-8
Understanding BackboneFast 16-9
Understanding EtherChannel Guard 16-11
Understanding Root Guard 16-11
Understanding Loop Guard 16-12
Configuring Optional Spanning-Tree Features 16-12
Default Optional Spanning-Tree Configuration 16-13
Optional Spanning-Tree Configuration Guidelines 16-13
Enabling Port Fast 16-13
Enabling BPDU Guard 16-14
Enabling BPDU Filtering 16-15
Enabling UplinkFast for Use with Redundant Links 16-16
Enabling Cross-Stack UplinkFast 16-17
Enabling BackboneFast 16-18
Enabling EtherChannel Guard 16-18
Enabling Root Guard 16-19
Enabling Loop Guard 16-19
Displaying the Spanning-Tree Status 16-20
CHAPTER 17 Configuring VLANs 17-1
Understanding VLANs 17-1
Supported VLANs 17-2
VLAN Port Membership Modes 17-3

Cisco 2950 - Catalyst Switch Specifications

General

Forwarding Rate	6.6 Mpps
Jumbo Frame Support	No
Weight	8.8 lbs (4 kg)
RAM	16 MB
Flash Memory	8 MB
Manageable	Yes
Form Factor	Rack-mountable
Ports	24 Ethernet 10/100 ports
Uplink Ports	2 x 10/100/1000Base-T ports
VLANs	250
MAC Address Table Size	8000
Power Supply	100-240 VAC, 50-60 Hz
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Operating Temperature	0 to 40 °C (32 to 104 °F)
Storage Temperature	-25 to 70 °C (-13 to 158 °F)
Operating Humidity	10% to 85% (non-condensing)
Storage Humidity	5% to 95% (non-condensing)