17.1 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 logging data of the collected Switch can be sent to other devices (such as UNIX workstations) on the network that have syslog function using syslog interface.*1, *2, *3 Also, log information can be sent to other devices on the network via email. This functionality means logs can be managed centrally even when multiple devices are being managed. Also, log information can be sent via email.

Note #1

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

Note #2

In syslog messages generated on the Switch, the HOSTNAME field of the HEADER part defined in RFC 3164 is not set.

Note #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.