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Troubleshooting
Debug/Syslog Operation
A Debug/Syslog destination device can be a Syslog server and/or a console
session. You can configure debug and logging messages to be sent to:
■ Up to six Syslog servers
■ A CLI session through a direct RS-232 console connection, or a Telnet or
SSH session
Debug/Syslog Configuration Commands
Event — Automatically sends switch-level event messages to the switch’s Event Log. Debug and
Notification
Syslog do not affect this operation, but add the capability of directing Event Log
Logging
messaging to an external device.
logging <syslog-ip-addr>
Command
facility
severity
system-module
debug acl
Command
all
arp-protect
destination
dhcp-snooping
dynamic-ip-
lockdown
Enables Syslog messaging to be sent to the specified IP address.
(Optional) The logging facility command specifies the destination (facility) subsystem
used on a Syslog server for debug reports.
Sends Event Log messages of equal or greater severity than the specified value to
configured debug destinations. (The default setting is to send Event Log messages from
all severity levels.)
Sends Event Log messages from the specified system module to configured debug
destinations. The severity filter is also applied to the system-module messages you select.
The default setting is to send Event Log messages from all system modules. To restore
the default setting, enter the no logging system-module <system-module> or logging
system-module all-pass commands.
Sends ACL Syslog logging to configured debug destinations. When there is a match with
a “deny” statement, directs the resulting message to the configured debug destination(s).
Sends debug logging to configured debug destinations for all ACL, Event Log, IP-OSPF,
and IP-RIP options.
Monitor and troubleshoot the validation of ARP packets
logging: Disables or re-enables Syslog logging on one or more Syslog servers configured
with the logging < syslog-ip-addr > command. See “Debug Destinations” on page C-52.
session: Assigns or re-assigns destination status to the terminal device that was most
recently used to request debug output. “Debug Destinations” on page C-52.
buffer: Enables Syslog logging to send the debug message types specified by the debug
< debug-type > command to a buffer in switch memory. See “Debug Destinations” on
page C-52.
windshell: print debug messages to windshell.
agent: Displays DHCP snooping agent messages.
event: Displays DHCP snooping event messages.
packet: Displays DHCP snooping packet messages.
Displays dynamic IP lockdown messages.
C-42