IBM Nortel Networks L2/3, Manual

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Chapter 9. Nortel Networks Layer 2/3 GbE Switch Module troubleshooting
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9.3.7 Problem resolution
Document the problem and resolution for future reference.
9.4 Troubleshooting tools
This section lists troubleshooting tools for your use.
Ping
This tool, also known as the Packet INternet Groper, allows you to check connectivity
between network devices. This tool is included with Windows, all variants of UNIX, and is also
available on many network device CLIs.
Traceroute
Traceroute records the route through the Internet between your computer and a specified
destination computer. If there is a loss of connectivity between the devices, this tool may help
in identifying the location of the break in connectivity. This tool is included with Windows, all
variants of UNIX, and is also available on many network device CLIs.
Telnet/SSH
Telnet/SSH allows you to connect to device command line interfaces. It is also useful in
checking whether a device is listening on a specific port, for example:
> telnet 192.168.1.1 80
Telnet is included with Windows, all variants of UNIX, and is also available on many network
device CLIs.
򐂰 Tools for Windows are:
– Telnet
– TeraTerm
– SecureCRT
򐂰 Tools for Linux are:
– Telnet
– SSH
Note: A basic Telnet client is included with Windows.
TeraTerm ( http://www.tucows.com ) is a freeware Telnet client and serial communications
application. Thus, you can also use it to configure a network device using the serial port of
the client station.
SecureCRT is a commercial Telnet and SSH client.
Linux includes text-based Telnet and SSH clients.