HP ProCurve Management And Configuration Manual page 628

Troubleshooting
Debug and Syslog Messaging Operation
C-44
Debug commands do not affect message output to the Event Log.
■
As a separate option, invoking debug with the event option causes the
switch to send Event Log messages to whatever debug destination(s) you
configure (session and/or logging), as well as to the Event Log.
■ Ensure that your Syslog server(s) will accept Debug messages. All
Syslog messages resulting from debug operation carry a "debug" severity.
If you configure the switch to transmit debug messages to a Syslog server,
ensure that the server's Syslog application is configured to accept the
"debug" severity level. (The default configuration for some Syslog appli­
cations ignores the "debug" severity level.)