Contents
Introduction
This document explains the correct settings to apply when you connect a PC to a router's console port. This document also details how to use the PC's Hyper Terminal to configure and monitor a router.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
This document is not restricted to specific software and hardware versions.
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 your network is live, ensure that you understand the potential impact of any command before you use it.
Conventions
For more information on document conventions, refer to the Cisco Technical Tips Conventions.
Background
When a console cable is connected from a PC's COM serial port to the router, a router prompt does not appear on the Hyper Terminal. Garbage characters appear on the Hyper Terminal, and the router no longer accepts keystrokes. It appears as if the router is hanging and is not responsive.
Solution
The settings in the Hyper Terminal need to be set correctly; otherwise, 'strange-looking' or garbage characters may show up on the screen. When you set up the connection, use these settings:
Here is a screenshot of how to configure these settings on a Windows-based PC running Hyper Terminal:
Without these settings, the router may display but does not accept any keystrokes. The router, therefore, appears as if it is hung or has crashed. With the correct settings, you can use Hyper Terminal to configure and monitor the router.
Note: On some routers the console speed has been changed in the configuration register, and a bits-per-second speed of 9600 does not work. However, this situation is not common. Valid speeds (other than 9600bps) include 1200, 2400, and 4800 bps. On some platforms, notably the 3600 Series Routers, 19200, 38400, 57600 and 115200 bps are supported. Try these if you fail to connect with the settings described in this document.
Console Session Not Accepting Key Strokes
This issue can be due to any of these reasons:
Difference in baud rate and the bits per second value
Bad console cable
Scroll lock option is enabled on the keyboard (make sure that the scroll lock key is disabled on the Keyboard)
Related Information
Contents
Introduction
Microsoft Hyperterminal is one of the most commonly used terminal emulator programs. This document explains how to use some Hyperterminal features with Cisco routers.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
This document is not restricted to specific software and hardware versions.
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.
Use the Correct Terminal Settings
If you see junk characters in Hyperterminal, or if the router no longer accepts keystrokes, it can be a Hyperterminal settings issue. Your router normally uses the default settings.
For information on how to configure those settings in Hyperterminal, refer to Applying Correct Terminal Emulator Settings for Console Connections.
If the default settings do not produce better results, it is possible that your router is configured to use nonstandard settings. In order to verify this, try to connect at different speeds until you get a valid prompt.
If none of the speeds is successful, your router can be in router hang state. To resolve the problem, refer to Troubleshooting Router Hangs.
Capture Router Output
In order to capture the output of long show commands (for example, from the show tech-support command) or router debugs, you cannot simply use copy and paste. Instead, use the Capture Text option from your Hyperterminal as explained here:
Select Transfer from the menu bar on your Hyperterminal program, and choose the Capture Text option from the pull-down menu:
In dialog box that is displayed, create the name of the file you want to send to the engineer. Then click Start.
Enter the terminal length 0 command at the router# prompt.
The terminal length command allows the console to scroll, even if you do not press the space bar after every screen.
Note: For the show tech-support command, 'terminal length 0' is on by default.
Issue the commands the engineer has asked for, such as the show interfaces command.
When the command is completed, select the Stop option from the Capture Text sub menu.
Repeat steps 1 through 5 for as many text captures as you need. Simply attach your newly created files to an e-mail, and send them to your Cisco support representative.
Note: It is not necessary to set the terminal length to zero each time. The terminal length setting stays at zero until another value is set manually.
Enter the terminal length 24 command at the router# prompt. This causes the console to pause after each full screen, and allows you to read the output:
Send a Break Signal
In order to recover a password, or troubleshoot router hangs and booting issues, send a break signal to your router. For Hyperterminal, this is usually done with the CTRL-Break or CTRL-F6 Break sequence. For a list of additional possible key combinations, refer to Standard Break Key Sequence Combinations.
If the router does not accept the break key, carefully read the Troubleshooting Tips and How to Simulate a Break Key Sequence sections from the Standard Break Key Sequence Combinations document.
Send a Cisco IOS Software Image Through Hyperterminal Xmodem
If for some reason (for example, a boot failure) you need to install a Cisco IOSĀ® software image through the console port, you can use Xmodem transfer. For detailed step-by-step instructions, refer to Xmodem Console Download Procedure Using ROMmon.
Related Information
Skype Configuration Settings
Contents
Introduction
This document provides procedures on to how to retrieve or change the IP address of the Cisco 6920 RateMux.
Note: The information in this document is based on Cisco RateMux version 2.5. For a description of the RateMux 6920, please refer to Data Sheet - Cisco 6920 RateMUX Advanced MPEG-2 Multiplexer.
Note: After Cisco RateMux version 2.3, the 6920 comes with a fixed IP address of 10.0.0.200. This is to facilitate the initial configuration of the Cisco router. If you are running an older version, this document describes How to Retrieve the IP Address from the RateMux.
Before You Begin
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
Prerequisites
Readers of this document should be knowledgeable of the following:
Digital programming
Satellite receivers
Encoders
MPEG-2 transport
Quadrature Amplitude Modulation (QAM)
Digital Headend Interface (DHEI)
Digital Video Broadcasting-Asynchronous Serial Interface (DVB-ASI) standards
Selective bit rate reduction
Components Used
The information in this document is based on the software and hardware versions below.
Running man sub indo ns21. Cisco RateMux 6920 with a PowerPC card
The software connect.exe and/or HyperTerminal loaded on your PC
An Ethernet crossover cable
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.
How to Connect to the RateMux
The PowerPC card has one Ethernet port and one Debug port. You can use these two ports to access the RateMux. See Figure 1 below.
Figure 1: PowerPC card on the Cisco RateMux 6920 Digital Video
The following two sections describe how to connect to the RateMux using both the HyperTerminal and the connect.exe program.
Connection Procedure Using HyperTerminal
Follow the instructions provided below to connect to the RateMux using HyperTerminal:
Connect a serial cable RS232 from the Debug port on the PowerPC card to the Serial Port on your PC.
Note: The Terminal port is not used.
Figure 2: Connection topology using HyperTerminal
Start a HyperTerminal session on COM1 with the following settings:
Bits per second = 57600
Data bits = 8
Parity = None
Stop bits = 1
Flow control = None
Figure 3 shows a picture of the HyperTerminal settings.
Figure 3: HyperTerminal settings to connect to the RateMux
Turn the RateMux power OFF.
Launch HyperTerminal.
Select Call from the HyperTerminal Menu bar.
Power on the RateMux.
Within 10 seconds of turning on the RateMux, select Connect from the HyperTerminal Call menu.
Click the mouse cursor on the open window in the HyperTerminal screen.
Click Enter or the space bar approximately once per second until the connection is established.
The first few lines show the BootLoader revision number and the IP and Ethernet Mac address being used by the Cisco 6920. See Figure 4 below.
Figure 4: Display on the HyperTerminal after power-cycling the RateMux
Connection Procedure Using the connect.exe Program
Another way access the RateMux is by launching the connect.exe program. Cisco recommends that you put a shortcut of this program in the desktop or your PC. Connect.exe establishes a connection from the PC to the RateMux via Ethernet. This can be accomplished using a network connection or a crossover Ethernet cable. See Figure 5 below.
Figure 5: Connecting using the Ethernet port and connect.exe program
Note: If you do not have a crossover cable, you can use two straight-through cables connected to a common hub.
While using a crossover cable or a hub:
Make sure that the IP addresses of the PC and the RateMux are on the same subnet.
Make sure you have the correct gateway defined on your PC.
You can change the TCP/IP properties of your PC to accomplish this.
Once physically connected, use the following steps to establish communications.
Power the RateMux OFF.
Start the connect.exe program by double-clicking on the icon.
Click Connection.
Click Connect under the Connection Menu, enter the IP address of the RateMux, and click OK.
Power ON the RateMux.
Click the cursor on the open window and hit Enter or space bar until the connection is established.
Figure 6 shows the connect.exe window after connection is established.
Figure 6: Connect.exe window after the connection to the RateMux has been established
How to Retrieve the IP Address from the RateMux
Usually, a unique IP address is assigned to the PowerPC module that is in the RateMux. The IP address given is in the network 10.0.0.0. Your web browser uses this pre-assigned IP address to communicate exclusively with the Cisco 6920. This IP address is printed on a label on the Cisco 6920.
Note: For versions 2.3 and later, the RateMux comes with the default IP address of 10.0.0.200.
Sometimes the Cisco 6920 does not have the IP address label. To determine the IP address follow the procedure below:
Follow the steps on the HyperTerminal procedure to connect to the RateMux.
Once the connection is established, the IP address appears on the second line of the output. In the example showed on Figure 4, the IP address is 10.0.0.178.
How to Change the IP Address on the Power PC Card of the RateMux
Most of the time it is desirable to be able to access the RateMux remotely. However, the predefined address may not be on your network scheme. The IP address usually appears on the 10.0.0.0 network with a mask of 255.0.0.0 and gateway 10.0.0.1. Having a mask of 255.255.255.0 and gateway of 10.0.0.6 is also common.
In this case, changing the IP address of the PowerPC card is desirable. This can be done via HyperTerminal or connect.exe. However, using the HyperTerminal is recommend. Notice that, when using connect.exe, you have to first set the TCP/IP settings on your PC to be on the same subnet as the RateMux. When changing this IP address, you will need to set the TCP/IP settings on your PC once more to get connection.
Connect to the RateMux using the HyperTerminal procedure.
Once you have the connection established, you will get a menu similar to the one in Figure 4. From the menu choose the following sequence of three options:
Select C: Environment Parameters And FLASH Partitions.
Select B: Environment Configuration.
Select B: Change Environment Parameters .
After this, you are prompted to enter several different parameters. You only need to change one of the following:
GATEWAY
NETMASK
IPADDR
For the other parameters, hit ENTER. In this example you change:
GATEWAY to 172.22.86.1
NETMASK to 255.255.254.0
IPADDR to 172.22.87.6
Sega saturn grandia. Type S: Save Environment Parameters to FLASH to save the configuration.
Type A: List Environment Parameters to view the current configuration used to view the settings on the RateMux.