Cisco Catalyst 2950 Hardware Installation Guide

4-3
Catalyst 2950 Desktop Switch Hardware Installation Guide
78-11157-05
Chapter 4 Troubleshooting
Diagnosing Problems
Table 4-1 describes how to detect and solve these problems.
Table 4-1 Common Problems and Solutions
Symptom Possible Cause Resolution
Poor performance or
excessive errors.
Duplex autonegotiation mismatch. Refer to the switch software
configuration guide for
information about identifying
autonegotiation mismatches.
Cabling distance exceeded.
• Port statistics show excessive
FCS
1
, late-collision, or
alignment errors.
• Refer to the switch software
configuration guide for
information about
displaying port statistics.
• For 10BASE-T, 100BASE-TX,
and 1000BASE-T connections:
– The distance between the
port and the attached device
exceeds 328 feet
(100 meters).
• Reduce cable length to
within the recommended
distances.
– If the switch is attached to a
repeater, the total distance
between the two end
stations exceeds the cabling
guidelines.
• Refer to your repeater
documentation for cabling
guidelines.
• For GBIC
2
module port
connections: The distance
between the GBIC module port
and the attached device exceeds
the GBIC cabling guidelines.
• Refer to your GBIC module
documentation for cabling
guidelines.
• For SFP
3
module port
connections: The distance
between the SFP module port
and the attached device exceeds
the SFP cabling guidelines.
• See Table 2-2 on page 2-16
for SFP cabling guidelines.

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