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The following table describes the characters that can appear in the traceroute command output.
Field
Description
*
The probe timed out.
?
Unknown packet type.
A
Administratively unreachable. Usually, this output indicates that an access list
is blocking traffic.
H
Host unreachable.
N
Network unreachable.
P
Protocol unreachable.
Q
Source quench.
U
Port unreachable.
telnet
The telnet User EXEC mode command is used to log in to a host that supports Telnet.
Syntax
telnet {ip-address | hostname} [port] [keyword1......]
•
ip-address — IP address of the destination host. (Range: Valid IP Address)
•
hostname — Hostname of the destination host. (Range: 1 - 160 characters)
•
port — A decimal TCP port number, or one of the keywords from the ports table in the
usage guidelines. The default is the Telnet port (decimal23) on the host.
•
keyword — Can be one or more keywords from the keywords table in the User Guidelines.
Default Configuration
This command has no default configuration.
Command Mode
User EXEC mode
User Guidelines
•
The Telnet software supports special Telnet commands in the form of Telnet sequences that
map generic terminal control functions to operating system-specific functions. To issue a
special Telnet command, press Esc and then a command character.
Special Telnet Command characters
System Management
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