Management and Configuration Guide K/KA/KB.15.15

Example 114 Event counter operation
Suppose the switch detects the following after a reboot:
• Three duplicate instances of the PIM "Send error" during the first log throttle period for this
event
• Five more instances of the same Send error during the second log throttle period for this event
• Four instances of the same Send error during the third log throttle period for this event
In this case, the duplicate message appears three times in the Event Log (once for each log throttle
period for the event being described), and the duplicate message counter increments as shown in
Table 3-4 (page 395). (The same operation applies for messages sent to any configured SNMP trap
receivers.)
Table 26 How the duplicate message counter increments
Duplicate message counter
1
Instances during 3rd log
throttle period
Instances during 2nd log
throttle period
Instances during 1st log
throttle period
13
45
94
1
This value always comprises the first instance of the duplicate message in the current log throttle period plus all previous
occurrences of the duplicate message occurring since the switch last rebooted.
Debug/syslog operation
While the Event Log records switch-level progress, status, and warning messages on the switch,
the debug/system logging (syslog) feature provides a way to record Event Log and debug messages
on a remote device. For example, you can send messages about routing misconfigurations and
other network protocol details to an external device, and later use them to debug network-level
problems.
Debug/syslog messaging
The debug/syslog feature allows you to specify the types of Event Log and debug messages that
you want to send to an external device. You can perform the following operations:
• Use the debug commandto configure messaging reports for the following event types:
ACL "deny" matches•
• Dynamic ARP protection events
• DHCP snooping events
• DIPLD events
• Events recorded in the switch's Event Log
• IPv4 routing events
• LACP events
• LLDP events
• OSPF events
• PBR class events
• SNMP events
• SSH events
Debug/syslog operation 395