Cisco Catalyst 2810 Series Manuale utente

Connecting a Terminal to the
Console Port on Catalyst Switches
Document ID: 10600
Contents
Introduction
Before You Begin
 Conventions
 Prerequisites
 Identifying a Rollover Cable, Straight-through, and Crossover Cable
Connecting a Terminal to Catalyst 1900/2820, 2900/3500XL, 2940, 2950, 2970, 3550,
and 3750 Series Switches
 Connecting to a Terminal
Connecting a Terminal to Catalyst 2948G-L3, 4908G-L3, and 4840G Series Switches
 Console Port Pinouts
Connecting a Terminal to Catalyst 2926 and 2926G Series Switches
 Catalyst 2926G Series Switch
Connecting a Terminal to the Catalyst 5000 Supervisor Engine I and II Console Port
 Configuring a Terminal for Attachment to the Console Port
Connecting a Terminal to the Catalyst 5000 Supervisor Engine III Console Port
 Configuring a Terminal for Attachment to the Console Port
Connecting a Terminal to the Catalyst 5000 Supervisor Engine II G and III G Console
and RSFC Ports
 Console Port Mode Switch
 Configuring a Terminal for Attachment to the Console or RSFC Port
Connecting a Terminal to the Catalyst 4000 Supervisor Engine I Console Port
Connecting a Terminal to the Catalyst 4000/4500 Supervisor Engine II/II+/III/IV,
2948G, 2980G, and 4912G
Catalyst 6000/6500 Supervisor Engine I, II and 720 Console Port Signals and Pinouts
 Console Port Mode Switch
 Console Port Mode 1 Signaling and Pinouts
 Console Port Mode 2 Signaling and Pinouts
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Catalyst 8510CSR, and 8540CSR Switches Console Port Pinouts

Related Information

Introduction

This document focuses on using the default parameters for connecting and configuring management

terminals. The switches covered in this document are the Catalyst 1900, 2820, 2900, 3500, 2940, 2950,

2970, 3550, 2948G-L3, 4000/4500, 4840G, 4908G-L3, 5000/5500, 6000/6500, and 8500 series switches.

For more information on using different connection speeds, cables, or devices, see the Hardware and

Installation Guide for your Catalyst series switch.

Before You Begin

Conventions

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

Prerequisites

There are no specific prerequisites for this document.

Identifying a Rollover Cable, Straight-through, and Crossover Cable

The information in this document is based on the software and hardware versions below.

The Catalyst series switches mentioned in this document require the use of either a rollover or

straight-through RJ-45 cable to connect a terminal to the console port depending on the type of

supervisor and other factors. Rollover cables and straight through cables have different pinouts than

crossover cables, which can be used to connect 10/100 base TX ethernet ports together between switches.

To identify the type of cable you are using, refer to RJ-45 Cables or Cabling Guide for Console and AUX

Ports.

The information presented in this document was created from devices in a specific lab environment. All

of the devices used in this document started with a cleared (default) configuration. If you are working in

a live network, ensure that you understand the potential impact of any command before using it.

Connecting a Terminal to Catalyst 1900/2820,

2900/3500XL, 2940, 2950, 2970, 3550, and 3750

Series Switches

Use the supplied rollover cable and the DB-9 adapter to connect a PC to the switch console port. You

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need to provide an RJ-45-to-DB-25 female data terminal equipment (DTE) adapter if you want to

connect the switch console port to a terminal. You may order a kit (part number ACS-DSBUASYN=)

containing the adapter from Cisco. The PC or terminal must support VT100 terminal emulation. The

terminal emulation softwarefrequently a PC application such as Hyperterminal or Procomm Plusmakes

communication between the switch and your PC or terminal possible during the setup program.

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

Be sure that your PC or terminal emulation software is configured to communicate with the switch

via hardware flow control.

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❍

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

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

to the terminal.

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

Run the terminal emulation program if you are using a PC or a terminal.6.

Table A-1: Console Port Signaling and Cabling Using 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

RTS 1 8 8 CTS

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Not

Connected 2 7 6 DSR

TxD 3 6 2 RxD

GND 4 5 5 GND

GND 5 4 5 GND

RxD 6 3 3 TxD

Not

Connected 7 2 4 DTR

CTS 8 1 7 RTS

Connecting 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 is not supplied with the switch. You may order a kit

(part number ACS-DSBUASYN=) containing this adapter from Cisco.

Table A-2: Console Port Signaling and Cabling Using 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

Not

Connected 2 7 6 DSR

TxD 3 6 3 RxD

GND 4 5 7 GND

GND 5 4 7 GND

RxD 6 3 2 TxD

Not

Connected 7 2 20 DTR

CTS 8 1 4 RTS

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Connecting a Terminal to Catalyst 2948G-L3,

4908G-L3, and 4840G Series Switches

You may configure the Catalyst switch routers from a direct console connection to the console port or

remotely through its management port.

Use the RJ-45-to-RJ-45 rollover cable and RJ-45-to-DB-9 female data terminal equipment (DTE)

adapter (labeled "Terminal") to connect the console port to a PC running terminal emulation

software.

●

If you are using 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. Data Terminal Ready (DTR) and Data Set Ready (DSR)

handshake signals are supported. The Request To Send (RTS) signal tracks the state of the Clear To Send

(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 Eata

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

¹Pin 1 and pin 8 are connected.

Connecting a Terminal to Catalyst 2926 and 2926G

Series Switches

On the Catalyst 2926 series switch, the console port is located on the Supervisor Engine front panel and

is labeled "CONSOLE," as shown in the figure below.

Figure: Console Port Connector (Catalyst 2926 Series Switch)

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The Supervisor Engine console port is a data communications equipment (DCE) DB-25 receptacle that

supports a DCE EIA/TIA-232 interface. EIA/TIA-232 supports unbalanced circuits at signal speeds up to

64 kbps.

Before connecting 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 bps) of the switch console port. Set up

the terminal as follows:

9600 BPS

●

8 data bits●

No parity●

1 stop bit●

Use a straight-through cable to connect the switch to a data terminal equipment (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 the figure below 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 connected to this port must be

capable of asynchronous transmission.

Both Data Set Ready (DSR) and Data Carrier Detect (DCD) are active when the system is running. The

Request To Send (RTS) signal tracks the state of the Clear To Send (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

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7 GND Ground

8 DTR > Data Terminal Ready

20 DCD < Data Carrier Detect

Catalyst 2926G Series Switch

The console and auxiliary (AUX) ports, located on the front panel of the Catalyst 2926G series switch,

are shown in the figure below.

Note: The AUX port is currently not supported.

Figure: Console and AUX Port Connectors

The console port, which is an EIA/TIA-232 asynchronous serial port with an RJ-45 connector, is a

full-featured DTE connection with hardware flow control.

Connect the terminal using a thin, flat RJ-45-to-RJ-45 rollover cable and an RJ-45-to-DB-9, an

RJ-45-to-D-subminiature female, or an RJ-45-to-D-subminiature male adapter (depending 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 n/a

2 (DTR) DSR

3 (RxD) TxD

4 (GND) GND

5 (GND) GND

6 (TxD) RxD

7 (DSR) DTR

8 is looped to pin 1 n/a

Note: An RJ-45-to-RJ-45 rollover cable and the adapters are provided in the console port accessories kit

shipped with your Catalyst 2926G series switch.

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Connecting a Terminal to the Catalyst 5000

Supervisor Engine I and II Console Port

The port is located on the Supervisor Engine front panel and is labeled "CONSOLE," as shown above.

The console port is a data communications equipment (DCE) DB-25 male receptacle that supports a

DCE EIA/TIA-232 interface. Both Data Set Ready (DSR) and Data Carrier Detect (DCD) are active

when the system is running. The Request To Send (RTS) signal tracks the state of the Clear To Send

(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, including 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 accessing a Supervisor Engine I remotely, see Connecting a Modem to the Console Port

on Catalyst Switches. Use a straight-through cable to connect the switch to a data terminal equipment

(DTE) device, such as a terminal or PC.

Figure: EIA/TIA-232 DB25 Adapter Cable Connectors

Table D-1: Supervisor Engine I & 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 & II Console Cable Pinouts 25 PIN - 9 PIN Adaptor Cable

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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

Configuring a Terminal for Attachment to the Console Port

Note: The console port is an asynchronous serial port; any device connected to this port must be capable

of asynchronous transmission.

Before connecting 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 as follows:

9600 baud

●

8 data bits●

No parity●

1 stop bit●

Connecting a Terminal to the Catalyst 5000

Supervisor Engine III Console Port

The port is located on the Supervisor Engine front panel and is labeled "CONSOLE," as shown above.

The port is an EIA/TIA-232 asynchronous, serial, full-featured data terminal equipment (DTE)

connection with hardware flow control and an RJ-45 connector. Use a straight-through cable to connect

the switch to a Data Terminal Equipment (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

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number is CAB-S3-CONSOLE=.

Note: The auxiliary (AUX) port is not supported.

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

Table E-1: Supervisor Engine III Console Port Pinouts RJ45-to-DB25 Adaptor Cable

RJ45 on Switch Console

(DTE) (Uses straight through

cable.) DB25 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 RJ45-to-DB9 Adaptor Cable

RJ45 on Switch Console (DTE)

(Uses straight through cable.) DB9 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) 

Configuring a Terminal for Attachment to the Console Port

Note: The console port is an asynchronous (Async) serial port; any device connected to this port must be

capable of asynchronous transmission.

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