Cisco Catalyst 6000 Series Switches

Introduction

This document focuses on use of the default parameters to connect and configure management terminals. This document covers the Catalyst 1900, 2820, 2900, 3500, 2940, 2950, 2970, 3550, 3560, 2948G-L3, 4500/4000, 4840G, 4908G-L3, 5500/5000, 6500/6000, and 8500 series switches. For more information on the use of different connection speeds, cables, or devices, refer to the Multilayer LAN Switches hardware and installation guide for your Catalyst series switch.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on these software and hardware versions:

• Catalyst 1900, 2820, 2900, 3500, 2940, 2950, 2970, 3550, 3560, 2948G-L3, 4500/4000, 4840G, 4908G-L3, 5500/5000, 6500/6000, and 8500 series switches

These switches require the use of either a rollover or straight-through RJ-45 cable to connect a terminal to the console port. The cable you use depends on the type of Supervisor Engine and other factors. Rollover cables and straight-through cables have pinouts that are different than crossover cables, which can connect 10/100BASE-TX Ethernet ports between switches. To identify the type of cable you use, refer to the document RJ-45 Cables or the Cabling Guide for Console and AUX Ports.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

For more information on document conventions, refer to the Cisco Technical Tips Conventions.

Connect a Terminal to Catalyst 1900/2820, 2900/3500XL, 2940, 2950/2955, 2970, 3550, 3560, and 3750 Series Switches

Use the supplied rollover cable and the DB-9 adapter to connect a PC to the switch console port. You need to provide an RJ-45-to-DB-25 female DTE adapter if you want to connect the switch console port to a terminal. You can order a kit (part number ACS-DSBUASYN=) that contains the adapter from Cisco. The PC or terminal must support VT100 terminal emulation. The terminal emulation software—frequently a PC application such as Microsoft Windows HyperTerminal or Symantec Procomm Plus—makes possible the communication between the switch and your PC or terminal during the setup program.

Follow these steps to connect the PC or terminal to the switch:

1. Be sure that you have configured your PC or terminal emulation software to communicate with the switch via hardware flow control.

2. Configure the baud rate and character format of the PC or terminal to match these console port default characteristics:

   • 9600 baud

   • 8 data bits

   • 1 stop bit

   • No parity

3. With the supplied rollover cable, insert the RJ-45 connector into the console port.

   

4. Attach the supplied RJ-45-to-DB-9 female DTE adapter to a PC, or attach an appropriate adapter to the terminal.

5. Insert the other end of the supplied rollover cable in the attached adapter.

6. Run the terminal emulation program, if you have a PC or a terminal.

Table A-1: Console Port Signaling and Cabling with a DB-9 Adapter

Console Port (DTE)	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-9 Terminal Adapter	Console Device
Signal	RJ-45 Pin	RJ-45 Pin	DB-9 Pin	Signal
RTS1	1	8	8	CTS2
No connection	2	7	6	DSR
TxD3	3	6	2	RxD4
GND5	4	5	5	GND
GND	5	4	5	GND
RxD	6	3	3	TxD
No connection	7	2	4	DTR6
CTS	8	1	7	RTS

¹ RTS = Request To Send

² CTS = Clear To Send

³ TxD = Transmit Data

⁴ RxD = Receive Data

⁵ GRD = Ground

⁶ DTR = Data Terminal Ready

Connect to a Terminal

Use the thin, flat RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-25 female DTE adapter to connect the console port to a terminal. Table A-2 lists the pinouts for the console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter.

Note: The RJ-45-to-DB-25 female DTE adapter does not come with the switch. You can order a kit (part number ACS-DSBUASYN=) that contains this adapter from Cisco.

Table A-2: Console Port Signaling and Cabling with a DB-25 Adapter

Console Port (DTE)	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-25 Terminal Adapter	Console Device
Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
RTS	1	8	5	CTS
No connection	2	7	6	DSR
TxD	3	6	3	RxD
GND	4	5	7	GND
GND	5	4	7	GND
RxD	6	3	2	TxD
No connection	7	2	20	DTR
CTS	8	1	4	RTS

Connect a Terminal to Catalyst 2948G-L3, 4908G-L3, and 4840G Series Switches

You can configure the Catalyst switch routers from a direct console connection to the console port or remotely through the management port.

• Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (with the label "Terminal") to connect the console port to a PC that runs terminal emulation software.

• If you use a direct console connection, configure your terminal emulation program for 9600 baud, 8 data bits, no parity, and 1 stop bit.

Console Port Pinouts

The console port is an RJ-45 receptacle. There is support for DTR and DSR handshake signals. The RTS signal tracks the state of the CTS signal. Table B-1 lists pinouts for the console port.

Table B-1: Console Port Pinouts

Pin	Signal	Direction	Description
11	RTS/CTS	Output	Request To Send/Clear To Send
2	DTR	Output	Data Terminal Ready
3	TxD	Output	Transmit Data
4	SGND	—	Signal Ground
5	SGND	—	Signal Ground
6	RxD	Input	Receive Data
7	DSR	Input	Data Set Ready
81	RTS/CTS	Input	Request To Send/Clear To Send

¹ Pin 1 has a connection to pin 8.

Connect a Terminal to Catalyst 2926 and 2926G Series Switches

On the Catalyst 2926 series switch, you find the console port on the Supervisor Engine front panel. The port has the label "CONSOLE," as shown in this figure:

Figure: Console Port Connector (Catalyst 2926 Series Switch)

The Supervisor Engine console port is a DCE DB-25 receptacle that supports a DCE EIA/TIA-232 interface. EIA/TIA-232 supports unbalanced circuits at signal speeds of up to 64 kbps.

Before you connect the console port, check the terminal documentation to determine the baud rate. The baud rate of the terminal must match the default baud rate (9600 bits per second [bps]) of the switch console port. Set up the terminal in this way:

• 9600 bps

• 8 data bits

• No parity

• 1 stop bit

Use a straight-through cable to connect the switch to a DTE device, such as a terminal or a PC. Use a null modem cable to connect the switch to a remote DCE device, such as a modem or a data service unit (DSU). See this figure for DCE and DTE cable connectors:

Figure: EIA/TIA-232 Adapter Cable Connectors, Network End

Note: The console port is an asynchronous (async) serial port; any device that connects to this port must be capable of asynchronous transmission.

Both DSR and data carrier detect (DCD) are active when the system runs. The RTS signal tracks the state of the CTS input. The console port does not support modem control or hardware flow control. Table C-1 lists the console port pinouts:

Table C-1: Catalyst 2926 Series Console Port Pinouts

Pin	Signal	Direction	Description
1	GND		Ground
2	RxD	—>	Receive Data
3	TxD	<—	Transmit Data
4	CTS	<—	Clear To Send
5	RTS	—>	Return To Send
7	GND		Ground
8	DTR	—>	Data Terminal Ready
20	DCD	<—	Data Carrier Detect

Catalyst 2926G Series Switch

The figure that follows shows the console and auxiliary (AUX) ports, which you find on the front panel of the Catalyst 2926G series switch.

Note: There is currently no support for the AUX port.

Figure: Console and AUX Port Connectors

The console port, which is an EIA/TIA-232 async serial port with an RJ-45 connector, is a full-featured DTE connection with hardware flow control.

Connect the terminal with a thin, flat RJ-45-to-RJ-45 rollover cable and one of these adapters:

• RJ-45-to-DB-9 adapter

• RJ-45-to-D-subminiature female adapter

• RJ-45-to-D-subminiature male adapter

Note: The adapter you use depends on the terminal connector.

Table C-2: Catalyst 2926G Series Console Port Pinouts

Console Port	Console Device
Pin (Signal)	Connect to
1 is looped to pin 8	—
2 (DTR)	DSR
3 (RxD)	TxD
4 (GND)	GND
5 (GND)	GND
6 (TxD)	RxD
7 (DSR)	DTR
8 is looped to pin 1	—

Note: You find an RJ-45-to-RJ-45 rollover cable and the adapters in the console port accessories kit that shipped with your Catalyst 2926G series switch.

Connect a Terminal to the Catalyst 5500/5000 Supervisor Engine I and II Console Port

You find the port on the Supervisor Engine front panel. The port has the label "CONSOLE," as the figure that precedes shows. The console port is a DCE DB-25 male receptacle that supports a DCE EIA/TIA-232 interface. Both DSR and DCD are active when the system runs. The RTS signal tracks the state of the CTS input. The console port does not support modem control or hardware flow control.

Note: If you need a replacement console port accessory kit for your Supervisor Engine I or II, the part number is ACS-2500ASYN=. This is the same kit that ships with many other Cisco routers, which include the Cisco 2500 series.

Use a null modem cable to connect the switch to a remote DCE device, such as a modem. For more information on how to access a Supervisor Engine I remotely, refer to the document Connecting a Modem to the Console Port on Catalyst Switches. Use a straight-through cable to connect the switch to a DTE device, such as a terminal or PC.

Figure: EIA/TIA-232 DB-25 Adapter Cable Connectors

Table D-1: Supervisor Engine I and II Console Cable Pinouts 25 PIN Straight-Through Cable

Switch Console (DCE)	Terminal (DTE)
2 Rxd	2 TxD
3 Txd	3 RxD
4 RTS	4 RTS
5 CTS	5 CTS
6 DSR	6 DSR
7 GND	7 GND
8 DCD	8 DCD
20 DTR	20 DTR

Table D-2: Supervisor Engine I and II Console Cable Pinouts 25 PIN - 9 PIN Adaptor Cable

Switch Console (DCE)	Terminal (DTE)
2 Rxd	3 TxD
3 Txd	2 RxD
4 RTS	7 RTS
5 CTS	8 CTS
6 DSR	6 DSR
7 GND	5 GND
8 DCD	1 DCD
20 DTR	4 DTR

Configure a Terminal for Attachment to the Console Port

Note: The console port is an async serial port; any device that connects to this port must be capable of asynchronous transmission.

Before you connect the console port, check the terminal documentation to determine the baud rate. The baud rate of the terminal must match the default baud rate (9600 baud) of the console port. Set up the terminal in this way:

• 9600 baud

• 8 data bits

• No parity

• 1 stop bit

Connect a Terminal to the Catalyst 5500/5000 Supervisor Engine III Console Port

You find the port on the Supervisor Engine front panel. The port has the label "CONSOLE," as the figure that precedes shows. The port is an EIA/TIA-232 async, serial, full-featured DTE connection with hardware flow control and an RJ-45 connector. Use a straight-through cable to connect the switch to a DTE device, such as a terminal or PC.

Note: If you need a replacement console port accessory kit for your Supervisor Engine III, the part number is CAB-S3-CONSOLE=.

Note: There is no support for the AUX port.

Figure: EIA/TIA-232 RJ-45 Adapter Cable Connector

Table E-1: Supervisor Engine III Console Port Pinouts RJ-45-to-DB-25 Adaptor Cable

RJ-45 on Switch Console (DTE) (Uses Straight-Through Cable)	DB-25 on Terminal (DTE)
1 RTS (looped to pin 8)	—
2 DTR	6 DSR
3 RxD	2 TxD
4 GND	7 GND
5 GND tied to 4	7 GND
6 TxD	3 RxD
7 DSR	20 DTR
8 CTS (looped to pin 1)	—

Table E-2: Supervisor Engine III Console Port Pinouts RJ-45-to-DB-9 Adaptor Cable

RJ-45 on Switch Console (DTE) (Uses Straight-Through Cable)	DB-9 on Terminal (DTE)
1 RTS (looped to pin 8)	—
2 DTR	6 DSR
3 RxD	3 TxD
4 GND	5 GND
5 GND tied to 4	5 GND
6 TxD	2 RxD
7 DSR	4 DTR
8 CTS (looped to pin 1)	—

Configure a Terminal for Attachment to the Console Port

Note: The console port is an async serial port; any device that connects to this port must be capable of asynchronous transmission.

Before you connect the console port, check the terminal documentation to determine the baud rate. The baud rate of the terminal must match the default baud rate (9600 baud) of the console port. Set up the terminal in this way:

• 9600 baud

• 8 data bits

• No parity

• 1 stop bit

Connect a Terminal to the Catalyst 5500/5000 Supervisor Engine II G and III G Console and RSFC Ports

You find the switch console port and the Route Switch Feature Card (RSFC) console port on the Supervisor Engine front panel. The ports have the labels "CONSOLE" and "RSFC", respectively, as the figure that precedes shows. Both ports are EIA/TIA-232 async, serial, full-featured DTE connections with hardware flow control and RJ-45 connectors.

Note: If you need a replacement console port accessory kit for your Supervisor Engine II G or III G, the part number is ACS-2500ASYN=. This is the same kit that ships with many other Cisco routers, which includes the Cisco 2500 series.

The type of cable that connects to a Supervisor Engine II G or III G console port depends on the position of the console port mode switch. See the Console Port Mode Switch section of this document for more information.

Use a null modem cable to connect the switch to a remote DCE device, such as a modem. For more information on how to access a Supervisor Engine II G or III G remotely, refer to the document Connecting a Modem to the Console Port on Catalyst Switches. Use a straight-through cable to connect the switch to a DTE device, such as a terminal or a PC.

Console Port Mode Switch

The console port mode switch allows you to connect either a terminal (DTE) or a modem (DCE). The connection depends on the mode that you have selected and the cable that you use.

Note: The cable and adapters that ship with the Supervisor Engine Module II G and Supervisor Engine Module III G are the same ones that you use on the Cisco 2500 series routers (and other Cisco products).

Use the console port mode switch in this way:

• Mode 1: Press to the in position. Use this mode to connect a terminal to the port with use of the console cable and DTE adapter (with the label "Terminal") that shipped with the Supervisor Engine. You can also use this mode to connect a modem to the port with use of the console cable and the DCE adapter (with the label "Modem") that shipped with the switch.

• Mode 2: Depress to the out position. Use this mode to connect a terminal to the port with use of the Supervisor Engine III console cable (which is not provided).

Figure: EIA/TIA-232 RJ-45 Adapter Cable Connector

Table F-1: Console Port Signaling and Cabling with a DB-9 Adapter

Switch Console (DTE)	RJ-45-RJ-45 Rollover Cable		RJ-45-to-DB-9 Adapter	Terminal (DTE)
Signal	RJ-45 Pin	RJ-45 Pin	DB-9 Pin	Signal
RTS	11	8	8	CTS
DTR	2	7	6	DSR
TxD	3	6	2	RxD
GND	4	5	5	GND
GND	5	4	5	GND
RxD	6	3	3	TxD
DSR	7	2	4	DTR
CTS	81	1	7	RTS

¹ Pin 1 has an internal connection to pin 8.

Table F-2: Console Port Signaling and Cabling with a DB-25 Adapter

Switch Console (DTE)	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-25 Adapter	Terminal (DTE)
Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
RTS	11	8	5	CTS
DTR	2	7	6	DSR
TxD	3	6	3	RxD
GND	4	5	7	GND
GND	5	4	7	GND
TxD	6	3	2	TxD
DSR	7	2	20	DTR
CTS	81	1	4	RTS

¹ Pin 1 has an internal connection to pin 8.

Configure a Terminal for Attachment to the Console or RSFC Port

Note: The console port is an async serial port; any device that connects to this port must be capable of asynchronous transmission.

Before you connect the console port, check the terminal documentation to determine the baud rate. The baud rate of the terminal must match the default baud rate (9600 baud) of the console port. Set up the terminal in this way:

• 9600 baud

• 8 data bits

• No parity

• 1 stop bit

Connect a Terminal to the Catalyst 4500/4000 Supervisor Engine I Console Port

The console port, which appears in the figure that follows, is a DCE DB-25 receptacle that supports a DCE EIA/TIA-232 interface. EIA/TIA-232 supports unbalanced circuits at signal speeds of up to 64 kbps.

Figure: DCE DB-25 Connector

Use a null modem cable to connect the switch to a remote DCE device, such as a modem or a DSU. Use a straight-through cable to connect the switch to a DTE device, such as a terminal or a PC.

The console port of the Catalyst 4500/4000 Supervisor Engine I uses a DB-25 connector and supports DTR, DSR, CTS, and RTS handshake signals. Table G-1 lists the Catalyst 4500/4000 Supervisor Engine I console port pinouts.

Table G-1: Catalyst 4003 Console Port Pinouts

Pin	Signal	Direction	Description
1	Ground
2	RxD	Input	Receive Data
3	TxD	Output	Transmit Data
4	CTS	Input	Clear To Send
5	RTS	Output	Request To Send
7	Ground
8	DTR	Output	Data Terminal Ready
20	DSR	Input	Data Set Ready

Connect a Terminal to the Catalyst 4500/4000 Supervisor Engine II/II+/III/IV, 2948G, 2980G, and 4912G

You can configure the Catalyst 4500/4000 series switches from a direct console connection to the console port.

• Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female DTE adapter (with the label "Terminal") to connect the console port to a PC that runs terminal emulation software. If you use a direct console connection, configure your terminal emulation program for 9600 baud, 8 data bits, no parity, and 1 stop bit.

Table H-1 lists the switch console port pinouts. Use a straight-through cable to connect the switch to a DTE device, such as a terminal or a PC.

Table H-1: Catalyst 4500/4000 Supervisor Engine II and later, 2948G, 2980G, and 4912G Console Port Pinouts

Pin	Signal	Direction	Description
1	RTS	Output	Request To Send
2	DTR	Output	Data Terminal Ready
3	TxD	Output	Transmit Data
4	Ground
5	Ground
6	RxD	Input	Receive Data
7	DSR	Input	Data Set Ready
8	CTS	Input	Clear To Send

Catalyst 6500/6000 Supervisor Engine I, II, and 720 Console Port Signals and Pinouts

The Catalyst 6500/6000 series switches come with an accessory kit that contains the cable and adapters you need to connect a console (an ASCII terminal or a PC that runs terminal emulation software) or modem to the console port. The accessory kit includes these items:

• RJ-45-to-RJ-45 rollover cable

• RJ-45-to-DB-9 female DTE adapter (with the label "Terminal")

• RJ-45-to-DB-25 female DTE adapter (with the label "Terminal")

• RJ-45-to-DB-25 male DCE adapter (with the label "Modem")

These items are the same cable and adapters that ship with the Cisco 2500 series routers and other Cisco products.

Console Port Mode Switch

The Supervisor Engine front-panel console port mode switch allows you to connect a terminal or modem to the console port in this way:

Note: Use a ball-point pen tip or other small, pointed object to access the console port mode switch. The switch ships in the in position.

• Mode 1: The switch is in the in position. Use this mode to connect a terminal to the console port with the RJ-45-to-RJ-45 rollover cable and the DTE adapter (with the label "Terminal"). You can also use this mode to connect a modem to the console port with the RJ-45-to-RJ-45 rollover cable and the DCE adapter (with the label "Modem"). See the section Console Port Mode 1 Signaling and Pinouts.

• Mode 2: The switch is in the out position. Use this mode to connect a terminal to the console port with the Catalyst 5500/5000 series Supervisor Engine III console straight-through cable and an appropriate adapter for the terminal connection. (The cable and adapter are not provided.) See the section Console Port Mode 2 Signaling and Pinouts.

Console Port Mode 1 Signaling and Pinouts

This section provides the signaling and pinouts for the console port in mode 1. (The port mode switch is in the in position.)

• DB-9 Adapter (for Connection to a PC)

  Use the RJ-45-to-RJ-45 rollover cable and the RJ-45-to-DB-9 female DTE adapter (with the label "Terminal") to connect the console port to a PC that runs terminal emulation software. Table I-1 lists the pinouts for the async serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-9 female DTE adapter.

  Table I-1: Port Mode 1—Console Port Signaling and Pinouts (DB-9 Adapter)

  Console Port	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-9 Terminal Adapter	Console Device
  Signal	RJ-45 Pin	RJ-45 Pin	DB-9 Pin	Signal
  RTS	11	8	8	CTS
  DTR	2	7	6	DSR
  TxD	3	6	2	RxD
  GND	4	5	5	GND
  GND	5	4	5	GND
  GND	6	3	3	TxD
  DSR	7	2	4	DTR
  CTS	81	1	7	RTS

  ¹ Pin 1 has an internal connection to pin 8.

• DB-25 Adapter (for Connection to a Terminal)

  Use the RJ-45-to-RJ-45 rollover cable and the RJ-45-to-DB-25 female DTE adapter (with the label "Terminal") to connect the console port to a terminal. Table I-2 lists the pinouts for the async serial console port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 female DTE adapter.

  Table I-2: Port Mode 1—Console Port Signaling and Pinouts (DB-25 Adapter)

  Console Port	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-25 Terminal Adapter	Console Device
  Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
  RTS	11	8	5	CTS
  DTR	2	7	6	DSR
  TxD	3	6	3	RxD
  GND	4	5	7	GND
  GND	5	4	7	GND
  RxD	6	3	2	TxD
  DSR	7	2	20	DTR
  CTS	81	1	4	RTS

  ¹ Pin 1 has an internal connection to pin 8.

• Modem Adapter

  Use the RJ-45-to-RJ-45 rollover cable and the RJ-45-to-DB-25 male DCE adapter (with the label "Modem") to connect the console port to a modem. Table I-3 lists the pinouts for the async serial auxiliary port, the RJ-45-to-RJ-45 rollover cable, and the RJ-45-to-DB-25 male DCE adapter.

  Table I-3: Port Mode 1—Console Port Signaling and Pinouts (Modem Adapter)

  Console Port	RJ-45-to-RJ-45 Rollover Cable		RJ-45-to-DB-25 Modem Adapter	Modem
  Signal	RJ-45 Pin	RJ-45 Pin	DB-25 Pin	Signal
  RTS	11	8	4	RTS
  DTR	2	7	20	DTR
  TxD	3	6	3	TxD
  GND	4	5	7	GND
  GND	5	4	7	GND
  RxD	6	3	2	RxD
  DSR	7	2	8	DCD
  CTS	81	1	5	CTS

  ¹ Pin 1 has an internal connection to pin 8.

Console Port Mode 2 Signaling and Pinouts

This section provides the signaling and pinouts for the console port in mode 2. (The port mode switch is in the out position). See Table I-4 for the pinouts. Mode 2 gives you the option to use a standard RJ-45 straight-through cable to connect a terminal.

Table I-4: Console Port Pinouts (Port Mode Switch Out)

Console Port	Console Device
Pin (Signal)	Input/Output
1 (RTS)1	Output
2 (DTR)	Output
3 (RxD)	Input
4 (GND)	GND
5 (GND)	GND
6 (TxD)	Output
7 (DSR)	Input
8 (CTS)1	Input

¹ Pin 1 has an internal connection to pin 8.

Catalyst 8510CSR and 8540CSR Switches Console Port Pinouts

The console port on the route processor is an EIA/TIA-232, DCE, DB-25 receptacle. Both DSR and DCD are active when the system runs. The RTS signal tracks the state of the CTS input. The console port does not support modem control or hardware flow control. The console port requires a straight-through EIA/TIA-232 cable. Table J-1 lists the console port pinouts.

Table J-1: DB-25 Console Port Pinouts

Pin	Signal	Direction	Description
1	GND	–	Ground
2	TxD	<—	Transmit Data
3	RxD	—>	Receive Data
4	RTS	—>	Ready To Send1
5	CTS	—>	Clear To Send1
6	DSR	—>	Data Set Ready (always on)2
7	GND	–	Ground
8	DCD	—>	Data Carrier Detect (always on)2
20	DTR	<—	Data Terminal Ready
Shield	GND	–	Shield Ground

¹ Pins 4 and 5 have a connection.

² Pins 6 and 8 have a connection.

Troubleshoot the Connection of a Terminal to the Console Port on Catalyst Switches

If you have trouble with connection to the device via the console connection, perform these tasks:

• Verify that the rollover or straight-through cable is a known good cable. (Do not use a crossover cable.)

• Try to use a different DB-9 adapter that connects to your PC.

• Verify that your terminal emulation software settings are 9600 baud, 8 data bits, no parity, and 1 stop bit.  Also, try to set the flow control to none, instead of hardware.

• Make sure that the rollover or straight-through cable terminates into the console port on the Catalyst switch. The cable should not terminate on the AUX port.

• Try to connect to the console port of the Catalyst switch from another PC or terminal.

Related Information

• Connecting a Modem to the Console Port on Catalyst Switches
• LAN Product Support Pages
• LAN Switching Support Page
• Technical Support - Cisco Systems