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This command is useful, particularly if, like me, you are not
the world's greatest typist. If you make a spelling mistake when
trying to enter a command (when you are in View rather than
Configuration mode), the router does not recognize the command. It
will assume that this strange word is the name of a host on the
network and that you wish to establish a Telnet session with it. The
router will not find the strange hostname in its own host table and
will try to find a Domain Name Server on the network in the hope
that the DNS machine will know the IP address of the strange host.
Either you do not have an available DNS machine or, if one is
available, it will not have details of this strangely named host.
The router, therefore, fails to establish a Telnet session. This
takes some time. To stop an unnecessary search, enter the
no IP domain-lookup
command in Configuration mode. It just makes life easier. |
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