19.1 Description

The Switch reports operating information and failure information as operation messages. The messages are output to operation terminals and are saved on switches as operation logs. You can use this information to manage the operating status of switches and failures.

An operation log records information about events that occur during switch operation in chronological order. This information is the same as the operation messages. The following information is saved as an operation log:

Operations performed by an operator and the response messages
Operation message

In a reference log, log information about the failures and warnings occurring on a switch is grouped by message ID. In addition, the reference log also contains information such as the date and time the event occurred the first time, the date and time the event last occurred, and the cumulative number of times that the event occurred.

Reference logs are saved on switches in text format. A switch administrator can view the information by using a display command.

The collected logging data for the Switch can be sent to a managed device on a network with syslog functions using syslog interfaces*1, *2, and *3. Similarly, you can also use E-Mail to send logging information to a networked administration appliance. This functionality means logs can be managed centrally even when multiple devices are being managed. Also, log information can be sent via email.

#1

Functionality to receive syslog messages from other devices is not supported.

#2

In syslog messaging generated by the Switch, HOSTNAME field of HEADER part defined in RFC5424 is not set.

#3

Immediately after the switch state of a member switch transitions from a backup to a master in a stacked configuration, it is temporarily unable to send IP packets to syslog servers. In such cases, logging may not be logged because messages to syslog servers do not reach syslog servers.

Use the operation-command show logging to check the log information during switch-state transitions.