Cisco Catalyst 2960-48PST Installation Guide Page 77
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Catalyst 2960 Switch Hardware Installation Guide
OL-7075-09
Chapter 4 Troubleshooting
Clearing the Switch IP Address and Configuration
These circumstances can result in a mismatch:
•
A manually set speed or duplex parameter is different from the manually set speed or duplex
parameter on the connected port.
•
A port is set to autonegotiate, and the connected port is set to full duplex with no autonegotiation.
To maximize switch performance and to ensure a link, follow one of these guidelines when you set or
change the settings for duplex and speed:
•
Let both ports autonegotiate both speed and duplex.
•
Manually set the speed and duplex parameters for the ports on both ends of the connection.
•
If a remote device does not autonegotiate, configure the duplex settings on the two ports to match.
The speed parameter can adjust itself even if the connected port does not autonegotiate.
Autonegotiation and NIC Cards
Problems sometimes occur between the switch and third-party network interface cards (NICs). By
default, the switch ports and interfaces are set to autonegotiate. It is common for devices such as laptop
computers or other devices to also be set to autonegotiate, yet sometimes autonegotiation issues occur.
To troubleshoot autonegotiation problems, try to manually set both sides of the connection. If this does
not solve the problem, the firmware or software on your NIC card might be causing the problem.
Upgrade the NIC card driver to the latest version available from the manufacturer.
Cabling Distance
If the port statistics show excessive FCS, late-collision, or alignment errors, verify that the cable
distance from the switch to the connected device meets the recommended guidelines. See Appendix B,
“Cable and Adapter Specifications.” for cabling guidelines.
Clearing the Switch IP Address and Configuration
If you have configured a new switch with an incorrect IP address, you can clear the IP address that is
configured on the switch.
Caution
This procedure clears the IP address and all configuration information that is stored on the switch. Do
not follow this procedure unless you want to completely reconfigure the switch.
Follow these steps to return your switch to the factory default settings:
1.
Press and hold the Mode button (see Figure 1-23 on page 1-15).
The switch LEDs begin blinking after about 2 seconds. If the switch is not configured, the LEDs
above the mode button turn green. You can omit this step and run Express Setup to configure the
switch.
2.
Continue holding down the Mode button. The LEDs stop blinking after an additional 8 seconds, and
then the switch reboots.
- Installation Guide 1
- CONTENTS 3
- Contents 4
- Audience 7
- Conventions 7
- Related Documentation 8
- OL-7075-09 10
- Product Overview 11
- Features 12
- Front Panel Description 14
- Switches 15
- Catalyst 2960 8-Port Switches 19
- Catalyst 2960 20
- 10/100 Ports 21
- 10/100/1000 Ports 21
- SFP Module Slots 23
- Dual-Purpose Port 23
- Catalyst 2960 Series 24
- System LED 25
- Port LEDs and Modes 26
- Dual-Purpose Port LEDs 28
- Rear Panel Description 29
- Internal Power Supply 30
- Cisco RPS 30
- Console Port 31
- Security Slots 31
- Management Options 32
- Preparing for Installation 33
- Warnings 34
- Installation Guidelines 36
- Verifying Switch Operation 37
- Installing the Switch 38
- Mounting the Switch in a Rack 42
- Wall-Mounting 43
- Statement 265 44
- Mounting the Switch on a Wall 45
- Table- or Shelf-Mounting 46
- Installing SFP Modules 48
- Removing SFP Modules 49
- Connecting to SFP Modules 50
- Where to Go Next 53
- Equipment That You Supply 58
- Statement 378 65
- CABLE SIDE ENTRY 66
- THIS SIDE AWAY FROM 66
- MOUNTING SURFACE 66
- Magnet Mounting 68
- Rack-Mounting 69
- Troubleshooting 73
- Verify Switch POST Results 74
- Monitor Switch LEDs 74
- Verify Switch Connections 74
- Ethernet and Fiber Cables 75
- Link Status 75
- Monitor Switch Performance 76
- Autonegotiation and NIC Cards 77
- Cabling Distance 77
- Cisco 11-character label 78
- Technical Specifications 81
- Specifications 83
- Connector Specifications 87
- 231 45678Pin Label 88
- SFP Module Ports 89
- Dual-Purpose Ports 89
- Catalyst 2960 switches 92
- Identifying a Crossover Cable 93
- Adapter Pinouts 94
- Accessing the CLI 95
- Connecting to a Power Source 98
- IP Settings 99
- Completing the Setup Program 99
- Numerics 103
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