Cisco Catalyst 2960 Series, Configuration Manual

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Table 154: Traceroute Output Display Characters
Description Character
The probe timed out. *
Unknown packet type. ?
Administratively unreachable. Usually, this output
means that an access list is blocking traffic. A
Host unreachable. H
Network unreachable. N
Protocol unreachable. P
Source quench. Q
Port unreachable. U
To end a trace in progress, enter the escape sequence (
Ctrl-^ X
by default). Simultaneously press and release
the
Ctrl
,
Shift
, and
6
keys and then press the
X
key.
Related Topics
IP Traceroute , on page 1628
Executing IP Traceroute, on page 1644
Example: Enabling All System Diagnostics
Because debugging output takes priority over other network traffic, and because the
debug all
privileged
EXEC command generates more output than any other
debug
command, it can severely diminish switch
performance or even render it unusable. In virtually all cases, it is best to use more specific debug
commands.
Caution
This command disables all-system diagnostics:
Switch#
debug all
The no debug all privileged EXEC command disables all diagnostic output. Using the no debug all command
is a convenient way to ensure that you have not accidentally left any debug commands enabled.
Related Topics
Debug Commands, on page 1630
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1654
Configuration Examples for Troubleshooting Software