Cisco Catalyst 2950 User Manual

Contents
xiii
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-12
CHAPTER 14 Configuring MSTP 14-1
Understanding MSTP 14-2
Multiple Spanning-Tree Regions 14-2
IST, CIST, and CST 14-3
Operations Within an MST Region 14-3
Operations Between MST Regions 14-4
Hop Count 14-5
Boundary Ports 14-5
Interoperability with IEEE 802.1D STP 14-5
Understanding RSTP 14-6
Port Roles and the Active Topology 14-6
Rapid Convergence 14-7
Synchronization of Port Roles 14-8
Bridge Protocol Data Unit Format and Processing 14-9
Processing Superior BPDU Information 14-10
Processing Inferior BPDU Information 14-10
Topology Changes 14-10
Configuring MSTP Features 14-11
Default MSTP Configuration 14-12
MSTP Configuration Guidelines 14-12
Specifying the MST Region Configuration and Enabling MSTP 14-13
Configuring the Root Switch 14-14
Configuring a Secondary Root Switch 14-16
Configuring the Port Priority 14-17
Configuring the Path Cost 14-18
Configuring the Switch Priority 14-19
Configuring the Hello Time 14-19
Configuring the Forwarding-Delay Time 14-20
Configuring the Maximum-Aging Time 14-21
Configuring the Maximum-Hop Count 14-21
Specifying the Link Type to Ensure Rapid Transitions 14-22
Restarting the Protocol Migration Process 14-22
Displaying the MST Configuration and Status 14-23
CHAPTER 15 Configuring Optional Spanning-Tree Features 15-1
Understanding Optional Spanning-Tree Features 15-1
Understanding Port Fast 15-2
Understanding BPDU Guard 15-2
Understanding BPDU Filtering 15-3

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz