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Troubleshooting

Debug and Syslog Messaging Operation

The switch’s Event Log records switch-level progress, status, and warning

messages. The Debug/System-Logging (Syslog) feature provides a method for

recording messages you can use to help in debugging network-level problems,

such as routing misconfigurations and other network protocol details.

Debug enables you to specify the types of event notification messages to send

to external devices. Debug messaging reports on these event types:

■ ACL “deny” matches

■ Selected IP routing events

■ Events that generate messages for the switch’s Event Log

You can configure the switch to send debug messages to these destinations:

■ Up to six Syslog servers

■ A CLI session through direct RS-232 console, Telnet, or SSH

Table C-4. Event Messaging Structure

Event Notifica-

tion Logging

— Automatic. Sends switch-level event messages to the switch’s Event Log. Debug and

Syslog add the capability of directing Event Log messaging to an external file.

Optional Debug

Commands

all Assigns debug logging to the configured debug destination(s) for all ACL, Event Log,

IP-OSPF, and IP-RIP options.

acl Assigns ACL Syslog logging to the debug destination(s). When there is a match with

a “deny” ACE, directs the resulting message to the configured debug destination(s).

arp-protect Assigns dynamic ARP-protection messages to the debug destination(s).

dhcp-snooping Assigns DHCP-snooping messages to the debug destination(s).

event Assigns standard Event Log messages to the debug destination(s). (These messages

are also sent to the switch’s Event Log, regardless of whether you enable this option.)

ospf Assigns OSPF event logging to the debug destination(s).

rip Assigns RIP event logging to the debug destination(s).

lldp Assigns LLDP debug logging to the debug destination(s).

Debug

Destinations

Destination logging Disables or re-enables Syslog logging if a Syslog server is already

configured by the logging < ip-addr > command. Optionally speci-

fies the destination (facility) subsystem used by the Syslog servers.

session Assigns or re-assigns destination status to the terminal device most

recently using this command to request debug output.

C-34

HP ProCurve Management And Configuration Guide

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