Troubleshooting

Debug/Syslog Operation

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. As shown in Figure C-8, you can perform the following operations:

■Use the debug command to configure messaging reports for the following event types:

•Dynamic ARP protection events

•DHCP snooping events

•Events recorded in the switch’s Event Log

•IPv4 routing events

•LLDP events

•OSPF events

•SSH events

•VRRP events

•Wireless Services events

■Use the logging command to select a subset of Event Log messages to send to an external device for debugging purposes according to:

•Severity level

•System module

Debug/Syslog Destination Devices

To use Debug/Syslog messaging, you must configure an external device as the logging destination by using the logging and debug destination commands. For more information, see “Debug Destinations” on page C-47and “Configuring a Syslog Server” on page C-49.

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