Cisco console connection linux

Cisco 1240 Connected Grid Router Hardware Installation Guide

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• Unpacking the Router
• Site Preparation and Installation Safety (Read before Installing)
• Hardware Features — Description and Specifications
• Mounting and Grounding the Router
• Opening and Closing the Router Chassis
• Making Network, Power, and Other Connections
• Powering Off the Router
• Unmounting the Router
• Installing Connected Grid Modules
• Antennas
• About the SD Flash Memory Module
• Installing Battery Backup Units (BBUs)
• Installing External, Non-Cisco Radio Modules
• LED Locations and States
• Appendix — Starting a Router Terminal or Console Session
• Appendix — Cable and Connector Specifications

Book Title

Cisco 1240 Connected Grid Router Hardware Installation Guide

Appendix — Starting a Router Terminal or Console Session

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Chapter: Appendix — Starting a Router Terminal or Console Session

Starting a Router Terminal Session

This section describes how to start a terminal session with the Cisco 1240 Connected Grid Router (CGR 1240 or router) using the console port. Start a terminal session with the router when you are at the router installation location and want to administer the router with a direct connection using the command-line interface (CLI) software.

These topics are discussed:

Before You Begin

Before you start a terminal session with the router, you must connect a PC or PC terminal to the router console port by following the instructions in Connecting the Console Port.

About the Console Port

Caution: The console port does not support cable glands. When a cable is connected to this port, the router interior is exposed to environmental elements, which can damage the port and the router interior. This port should be exposed only during terminal sessions, when a cable is connected to the port. This port should never be left unattended when in use.

The console port is an asynchronous serial port that allows you to connect to the device for initial configuration through a standard RS-232 port with an RJ-45 connector. Any device connected to this port must be capable of asynchronous transmission.

Console Port Settings

Configure the following parameters for the console port:

Specifies the transmission speed for the connection.

Specifies the number of bits in an 8-bit byte that is used for data.

Specifies the odd or even parity for error detection.

Specifies the stop bits for an asynchronous line.

Using the Ctrl-C Command

The router console port is located on the router exterior and is accessible by removing the seal over the console port (see Console Port).

On many Cisco routers, you can enter Ctrl-C to interrupt the router startup process and then delete or change the admin password, or view or delete the router configuration.

To prevent unauthorized access to the router configurations and passwords, the Ctrl-C command is disabled on the Cisco CGR 1240 Router while it is booting up and loading the system software.

Connecting to the Console Port with Microsoft Windows

To connect to the router console port using Microsoft Windows:

1. Start a terminal emulator application, such as Windows HyperTerminal (included with some versions of Windows OS) or PuTTY .

2. Configure the terminal emulation software with the parameters described in About the Console Port.

3. Connect to the router.

Connecting to the Console Port with Mac OS X

To connect a Mac OS X system USB port to the console using the built-in OS X Terminal utility:

1. Use the Finder to go to Applications > Utilities > Terminal.

2. Connect the OS X USB port to the router.

3. Enter the following commands to find the OS X USB port number:

macbook:user$ cd /dev macbook:user$ ls -ltr /dev/*usb* crw-rw-rw- 1 root wheel 9, 66 Apr 1 16:46 tty.usbmodem1a21
DT-macbook:dev user$

4. Connect to the USB port with the following command followed by the router USB port speed:

macbook:user$ screen /dev/tty.usbmodem1a21 9600

To Disconnect the OS X USB Console from the Terminal Window

Enter Ctrl+A followed by Ctrl+\

Connecting to the Console Port with Linux

To connect a Linux system USB port to the console using the built-in Linux Terminal utility:

1. Open the Linux Terminal window.

2. Connect the Linux USB port to the router.

3. Enter the following commands to find the Linux USB port number:

root@usb-suse# cd /dev root@usb-suse /dev# ls -ltr *ACM* crw-r—r— 1 root root 188, 0 Jan 14 18:02 ttyACM0 root@usb-suse /dev#

4. Connect to the USB port with the following command followed by the router USB port speed:

root@usb-suse /dev# screen /dev/ttyACM0 9600

To Disconnect the Linux USB Console from the Terminal Window

Enter Ctrl+A followed by :, and then type quit.

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CiscoConsole

People who work with Cisco network equipment need to be able to connect to the console port on their devices. In Windows, you can simply fire up HyperTerminal to get basic access to your devices. If you are using Linux, then you need to know how this can be done with an application called Minicom.

Hardware

First, you are going to need a Cisco console cable, a Cisco device, and a computer. If your computer has a serial port, then you can use the standard console cable that comes with every Cisco device.

If you do not have a serial port (like most new laptops), then you need to purchase a USB to Serial adapter that supports Linux. Many of them do not require a driver in Linux. Make sure the item is plugged in at boot time & the system should find it. This device will allow you to use the standard Cisco cable which has a DB9 serial connector on one end & an RJ45 connector on the other.

Install Minicom

You can easily install Minicom by using «System > Administration > Synaptic Package Manager». Search for «minicom» and choose to install the package. Click «Apply» and Minicom should be installed within a few seconds.

Find the name of your serial port

Next, you need to find out is which device your serial (including the USB adapter) ports are mapped to. The easiest way to do this is to connect the console cable to a running Cisco device. Now open up a Terminal using «Applications > Accessories > Terminal» and type this command:

The output will look something like one of these:

[ 0.788856] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.789144] 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [94023.461242] usb 2-1: pl2303 converter now attached to ttyUSB0 [107561.131086] type=1503 audit(1260922689.994:33): operation="open" pid=27195 parent=27185 profile="/usr/sbin/cupsd" requested_mask="w::" denied_mask="w::" fsuid=0 ouid=0 name="/dev/ttyUSB0

Look in this output for words that contain «tty». In this case, it is «ttyS0». That means the name of the device that corresponds to your serial port is «ttyS0». The name of your device that corresponds to your USB port has a definition of name=»/dev/ttyUSB0″ (make sure it’s plugged in). Now we are ready to configure Minicom to use this information.

Configure Minicom

Open a terminal using «Applications > Accessories > Terminal». Now type this command to enter the configuration menu of Minicom:

Use the keyboard arrow keys to select the menu item labeled «Serial Port Setup» and then hit «Enter». This will open a window that looks similar to the one below:

• Change the line speed (press E) & change to «9600»
• Change the hardware flow control (press F) & change to «No»
• Change the serial device (press A) & change to «/dev/ttyS0»
• Or to use your USB port, change the serial device to «/dev/ttyUSB0»
  • Be sure to use the device name that you learned with the grep output.

  Once your screen looks like mine, you can hit «Escape» to go back to the main menu. Next, you need to select «Save setup as dfl» and hit «Enter» to save these settings to the default profile. Then select «Exit Minicom» to exit Minicom.

  To find out if you have configured Minicom correctly, type this command in the terminal:

  After entering your Ubuntu user password, you should be connected to your Cisco device.

  Once inside, press Ctrl+A, to access minicom commands. Press ‘Ctrl+A’, then ‘Z’ to access help. Ctrl-A, then another letter, like ‘X’ & you will eXit. Help will show a list of available commands.

  Note: You may want to delete the Minicom init string if you see a bunch of gibberish every time you connect to a device. To do this, enter Minicom configuration with:

  Then select «Modem and dialing». Press «A» to edit the Init string, and delete all characters so that it becomes empty. Make sure you save this to the default profile with «Save setup as dfl». You should no longer see gibberish when you connect to devices.

  Create a desktop launcher

  1. Right-click on the desktop and choose «Create launcher»
  2. Click on «Icon» and choose the picture you want to use
  3. Use the «Type» pull-down menu and select «Application in terminal»
  4. Create a name like «Cisco Console» in the field labeled «Name»
  5. Enter this command into the field labeled «Command»
     • sudo minicom
  6. Hit «OK» and your desktop launcher is ready for you to use.

  References

  CiscoConsole (последним исправлял пользователь 78-105-201-166 2011-04-10 20:25:25)

  The material on this wiki is available under a free license, see Copyright / License for details
  You can contribute to this wiki, see Wiki Guide for details

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  Ubuntu, Minicom & Cisco router console connection

  

  Got a nice Cisco 857w to play around with yesterday 🙂 Before you get into any misconceptions let me tell you that I’ve never before made my own configuration in a Cisco router, but I really (really!) want to learn about it ( hey, stop snickering! ).

  So. first things first — wipe out the router config, I thought, and start from scratch. I managed to do THAT part pretty easily, however, as any knowing person will tell you, that leaves all ethernet ports down. so here comes the console cable to the rescue! If you can actually make it to work 😛

  So, here’s what I had to do to get things done in Ubuntu 8.10 :

  • Get the blue console cable and connect it to your serial port, and the router console port ( the one that says «console» over it 😛 )
  • Launch a terminal window and get Minicom using

  sudo apt-get install minicom

  • The message «Initializing Modem» refers to your serial port ( got me confused there for a sec
  • If you don’t get greeted by the Router> prompt, check your BIOS settings — I disabled my COM port long ago, and had forgotten all about it!
  • If you want to reconnect to your router, you only need to use «sudo minicom» if you saved as default, or «sudo minicom cisco» if you saved to a file named cisco 🙂

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