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Using Telnet
Telnet, part of the TCP/IP protocol suite, is a virtual terminal protocol that allows you to make
connections to remote devices, gather information, and run programs.
After your routers and switches are configured, you can use the Telnet program to reconfigure
and/or check up on your routers and switches without using a console cable. You run
the Telnet program by typing telnet from any command prompt (DOS or Cisco). You need
to have VTY passwords set on the routers for this to work.
Remember, you can’t use CDP to gather information about routers and switches that aren’t
directly connected to your device. But you can use the Telnet application to connect to your
neighbor devices and then run CDP on those remote devices to get information on them.
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