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Cabling Guide for Console and AUX Ports

2006-12-10 15:25 387 查看

Introduction

This document summarizes the cabling requirements for console and auxiliary (AUX) ports. Cisco routers either have RJ-45-based or DB-25 DCE/DTE console and AUX ports. You can connect either a terminal (DTE) or a modem (DCE) to these ports. In either instance, you need both an RJ-45 cable and an RJ-45-to-DB-25 or RJ-45-to-DB-9 connector.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Table of Routers with Console and AUX Ports

The table in this section lists the Cisco router series and the corresponding console and AUX ports.
RouterConsole PortConsole Port CableAUX PortAUX Port Cable
600RJ-45 (management port)RJ-45 Rolled / RJ-45 to DB-9 Female N/AN/A
700RJ-45 RJ-45 Rolled N/AN/A
800RJ-45 RJ-45 Rolled / RJ-45 to DB-9 Female N/AN/A
1000RJ-45 RJ-45 Rolled N/AN/A
1600RJ-45 RJ-45 Rolled / RJ-45 to DB-9 Female N/AN/A
1700RJ-45 RJ-45 Rolled / RJ-45 to DB-9 Female RJ-45 RJ-45 Rolled
2500RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
2600RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
3600RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
MC3810RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
4000DB-25 DCE RS 232 / RJ-45 Rolled DB-25 DTE RS 232 / RJ-45 Rolled
AS5200/5300RJ45 RJ-45 Rolled RJ-45 RJ-45 Rolled
AS5400RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
AS5800DB-25 DCE RS 232 / RJ-45 Rolled DB-25 DTE RS 232 / RJ-45 Rolled
7100/7200/7300RJ-45 RJ-45 Rolled RJ-45 RJ-45 Rolled
7200DB-25 DCE RS 232 / RJ-45 Rolled DB-25 DTE RS 232 / RJ-45 Rolled
7500DB-25 DCE RS 232 / RJ-45 Rolled DB-25 DTE RS 232 / RJ-45 Rolled
12000DB-25 DCE RS 232 / RJ-45 Rolled DB-25 DTE RS 232 / RJ-45 Rolled

Console Port Settings for Terminal Connection

Before you connect a terminal to the console port, configure the terminal to match the router console port as shown here:

9600 baud

8 data bits

no parity

2 stop bits (9600 8N2) OR 1 stop bit¹
¹Dependant on the router.

Types of Console and AUX Connectors

Cisco routers have three types of console and AUX connectors. The table in this section lists these types:

RJ-45

DB-25 DCE

DB-25 DTE

There are three styles of RJ-45-to-DB-25 connectors:

DCE style (modem)

DTE style

DCE style (non modem)

Each of these styles has a different role. Generally, DTE is for terminals, DCE (modem) is for modems, and DCE (non-modem) is obsolete.
Note: Move pin 6 to pin 8 if you want to change a DCE style (non modem) to a DCE style (modem).
Console and AUX Connectors for Cisco Routers
ConnectorGraphic
RJ-45
DB-25 DCE
DB-25 DTE
Cabling for console and AUX port:

RJ-45 Cables

RS 232 Straight-through Cable

Types of RJ-45 Cabling

Cisco products use these types of RJ-45 cables:

Straight-through

Crossover

Rolled

RJ-45 to DB9 female

Cisco does not provide these cables. These cables are widely available from other sources. Console cable is usually provided with the Console Cable Kit.
Note: The console port does not support modem control or hardware flow control.



How to Identify an RJ-45 Cable

In order to identify the RJ-45 cable type, hold the two ends of the cable next to one another so you can see the colored wires inside the ends, as shown here:



There are three types of commonly used RJ-45 cabling: straight, cross and rolled. Hold the two ends of an RJ-45 cable side by side. There are eight colored strips, or pins, at each end. If the order of the colored pins is the same at each end, the cable is straight. If the order of the colors is reversed at each end, the cable is rolled.
Examine the sequence of colored wires to determine the type of RJ-45 cable. This section explains how you can do this.

Straight-through Cable

In a straight-through cable, the colored wires are in the same sequence at both ends of the cable.
Straight-through Cable



RJ-45 Straight-through (Ethernet) Cable Pin-outs
SignalRJ-45 PinRJ-45 PinSignal
Tx+11Tx+
Tx–22Tx–
Rx+33Rx+
–44–
–55–
Rx–66Rx–
–77–
–88–

Crossover Cable

In a crossover cable, the first (far left) colored wire at one end of the cable is the third colored wire at the other end of the cable.
Crossover Cable



RJ-45 Crossover (Ethernet) Cable Pin-outs
SignalRJ-45 PinRJ-45 PinSignal
Tx+13Rx+
Tx–26Rx–
Rx+31Tx+
–44–
–55–
Rx–62Tx–
–77–
–88–

Rolled Cable

In a rolled cable, the colored wires at one end of the cable are in the reverse sequence of the colored wires at the other end of the cable.
Rolled Cable



Rolled Cable Pinouts
SignalRJ-45 PinRJ-45 PinSignal
–18–
–27–
–36–
–45–
–54–
–63–
–72–
–81–
Note: CAB-OCTAL-ASYNC, the 8-port RJ-45 adapter that is used with the Cisco 2509, 2510, 2511, and 2512, is the same as a rolled cable.

RJ-45 to DB-9 Female*



This cable is also known as Management Cable.
*Cisco provides this cable with the 600, 800, 1600 and 1700 Series Routers.

Type of Cable for DB-25 Connectors

RS 232 Straight-through Cable
This illustration shows serial cable CAB-R23= (part number 74-0173), which is a general serial cable for all router platforms:
Both Ends of RS 232 Straight-through Cable for DB-25 Connectors



This cable has a female DB-25 connector on one end and a male DB-25 connector on the other end. Either end of the CAB-R23 cable can be the Cisco end or the network end, depending on whether the Cisco router is designated as a DCE device or a DTE device. If the router is designated as a DCE device, the female DB-25 connector is the Cisco end. If the router is designated as a DTE device, the male DB-25 connector is the Cisco end.
Pin-outs for RS 232 Straight Through Cable (DB-25)
Male DTE Pin-outsFemale DTE Pin-outs
25 PinSignal25 PinSignal
––
J2-1Shield GNDJ2-1Shield GND
J2-2 Shield TxD –J2-2 ShieldTxD –
J2-3 Shield RxD –J2-3 Shield RxD –
J2-4 Shield RTS –J2-4 ShieldRTS –
J2-5 Shield CTS –J2-5 Shield CTS –
J2-6 Shield DSR – J2-6 ShieldDSR –
J2-7 ShieldCircuit GND – J2-7 Shield Circuit GND
J2-8 ShieldDCD –J2-8 ShieldDCD –
J2-15 ShieldTxC –J2-15 ShieldTxC –
J2-17 ShieldRxC –J2-17 ShieldRxC –
J2-18 Shield LTST –J2-18 ShieldLTST –
J2-20 Shield DTR –J2-20 Shield DTR –
J2-24 ShieldTxCE – J2-24 Shield TxCE –

Adapters

You need two types of adapters to connect a PC to a router.

RJ-45-to-DB-9 Adapter

RJ-45-to-DB-25 Adapter

RJ-45-to-DB-9 Adapter

This adapter connects a router to a PC though a COM port.
RJ-45-to-DB-9 Adapter



RJ-45-to-DB-25 Adapter

This adapter connects a router to PC through a serial port.
RJ-45-to-DB-25 Adapter



Cabling and Adapter Setups that Work

Here are the most common ways to console into a router.
Console Connection Combination
Console PortCableAdapter for PCAdapter for Console Port
RJ-45RJ-45 RolledDB-9 / DB-25None

DB-25 DCERJ-45 RolledDB-9 / DB-25RJ-45-to-DB-25

DB-25 DCEDB-25NoneNone

RJ-45RJ-45-to-DB-9¹NoneNone

¹ Cisco provides this cable with the Cisco 600, 800, 1600 and 1700 Series Routers.
You cannot mix and match these components randomly. Here are the combinations that work:
Console Connection Combination
PortRJ-45 CableDB-25 AdapterTo Attach
AUX / ConsoleStraightDCE non-modemTERMINAL
AUX / ConsoleRolledDTETERMINAL
AUX / ConsoleRolledDCE modemMODEM
AUX / ConsoleRJ-45-to-DB9NoneTERMINAL
These are the only setups that work. If you do not have the components you need, use the RJ-45 Component Guide chart to order them.

RJ-45 Port and Adapter Pin-outs

This chart shows the pin-outs for RJ-45 console and AUX ports. The console port does not use RTS/CTS.
RJ-45 Port Pin-outs
SignalConsole Port (DTE)RJ-45 Rolled CableAdapterAdapterSignal
RJ-45RJ-45 PinDB-9 PinDB-25 Pin
CTS1874RTS
DTR27420DSR
TxD3632RxD
GND4557GND
GND5457GND
RxD6323TxD
DSR7268DTR
RTS8185CTS

DB-25 Console and AUX Port Pin-outs

Console Port Signals
PinSignalDirectionDescription
1GND–Ground
2TxD<--Transmit Data
3RxD-->Receive Data
6DSR-->Data Set Ready (always on)
7GND–Ground
8DCD-->Data Carrier Detect (always on)
Note: The console port does not support modem control or hardware flow control.
Auxiliary Port Signals
PinSignalDirectionDescription
2TxD-->Transmit Data
3RxD<--Receive Data
4RTS-->Request To Send (used for hardware control)
5CTS<--Clear To Send (used for hardware flow control)
6DSR<--Data Set Ready
7Signal Ground–Carrier Detect (used for modem control)
8CD<--Data Terminal Ready (used for modem control only)
20DTR-->
Note: The auxiliary port supports hardware flow control and modem control.

Console Cable Kit

A console cable kit is provided with your router. Use this kit when you connect your router to a PC or a terminal.
The console cable kit contains these items:

RJ-45-to-RJ-45 console cable (blue)

RJ-45-to-DB-25 adapter (gray)

RJ-45-to-DB-9 adapter (gray)

Note: The Cisco 7200 Series and Cisco 7301 are not shipped by default with a console cable kit. If a console cable is required, order an accessory kit (part number: ACS-2500ASYN).
RJ-45-to-RJ-45 console cableRJ-45-to-DB-25 adapterRJ-45-to-DB-9 adapter



Cisco RJ-45 Component Guide

This chart summarizes the RJ-45 components of Cisco:
RJ-45 Component Guide
StyleCatalog Part NumberCatalog DescriptionLabelShielded?
DTECAB-500DTF=DB-25 CONNECTOR, DTE FEMALE 29-0810-01/29-DTF-01no
DTECAB-500DTM=DB-25 CONNECTOR, DTE MALEno
modemCAB-25AS-MMOD=CABLE CONN-MODEM TO RJ45 SHLDyes
modemCAB-MMOD=ADP,RJ45/DSUB 29-0881-01/29-MMOD-01 no
DCECAB-500DCF=DB-25 CONNECTOR, (non modem) DCE FEMALE29-0809-01/29-DCF-01no
DCECAB-500DCM=DB-25 CONNECTOR,(non modem) DCE MALE29-0808-01/29-DCM-0129-
0808-01/29-DCM-01		no
NARolled Cable CABASY,RJ45 ROLLED, MODULAR72-0876-01/CAB-500RJ NA
NAStraight Cable –not in catalog–31-0756-01NA
Cable for DB-25/DB-9 Connection
NADepends on the router*RJ-45 to DB-9 female an all in one cable72-3383-01NA
NACAB-R23= RS 232 Straight-through Cable–NA
NADepends on the router*DB-9 Male to DB-25 male for Modem connection29-4043-01NA
The first seven entries are DB-25 connectors, and the last two are RJ-45 cables. Connectors are described in terms of their sex and their role. For example, an FDTE is a female DTE style connector, an MMOD is a male modem style connector, and so on. Remember, you need shielded cables in order to run at 115.2 kbps.
原文地址 http://www.cisco.com/en/US/products/hw/routers/ps332/products_tech_note09186a0080094ce6.shtml#topic8
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