Cisco Catalyst 2950 Software Guide

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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 9 Configuring STP
Understanding Advanced STP Features
Limitations
These limitations apply to CSUF:
• CSUF uses the GigaStack GBIC and runs on Catalyst 3550 switches, all Catalyst 3500 XL switches,
Catalyst 2950 switches with GBIC module slots, and on modular Catalyst 2900 XL switches.
• Up to nine stack switches can be connected through their stack ports to the multidrop backbone.
Only one stack port per switch is supported.
• Each stack switch can be connected to the STP backbone through one uplink.
• If the stack consists of a mixture of Catalyst 2900 XL, Catalyst 3500 XL, Catalyst 2950 and Catalyst
3550 switches, up to 64 VLANs with STP enabled are supported. If the stack consists of
Catalyst 3550 switches, up to 128 VLANs with STP enabled are supported.
Connecting the Stack Ports
A fast transition occurs across the stack of switches if the multidrop backbone connections are a
continuous link from one GigaStack GBIC to another as shown in Figure 9-9. You should follow these
guidelines:
• A switch supports only one stack port.
• Do not connect alternate stack-root ports to stack ports.
• Connect all stack ports on the switch stack to the multidrop backbone.
• You can connect the open ports on the top and bottom GigaStack GBICs within the same stack to
form a redundant link.

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