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Syslog Options

Use this information to send system log messages to local files, external hosts, users, or the console. Also configure content types, archive settings, and more.

Table 1: Files
Field Description
Add File

Use the Add File link to specify a named file in the local file system. Syslog messages that match the specified criteria will be sent to this file.

Cycle through this process as needed to specifying multiple files for different matching criteria.
File Name Enter a name for the file.
Match To filter messages, enter a text string. Only log messages that contain this string will be saved to the specified file.
Explicit Priority Select this option to include priority information in the file.
Structured Data Select this option to use structured-data format instead of the standard Junos OS format. Structured-data format provides more information without adding significant length, and makes it easier for automated applications to extract information from a message.
Archive Set the maximum number of files to store, and the maximum file size in megabytes (m) or bytes.
Contents To specify the types of log information to capture, click Add Content, select the Facility and the Level, and then click the check mark in the Add Content title bar. Repeat as needed until you've specified all the content that you want to capture. Only logs that meet these conditions will be saved to the specified file.

For more information about the content options, see Table 4 later in this topic.
Table 2: Hosts
Field Description
Add Host

Use the Add Host link to specify an external server that is configured as a system log message host. Syslog messages that match the specified criteria will be sent to this server.

Cycle through this process as needed to specifying multiple hosts for different matching criteria.
File Name Enter a name for the file.
Match To filter messages, enter a text string. Only log messages that contain this string will be saved to the specified file.
Explicit Priority Select this option to include priority information in the file.
Structured Data Select this option to use structured-data format instead of the standard Junos OS format. Structured-data format provides more information without adding significant length, and makes it easier for automated applications to extract information from a message.
Archive Set the maximum number of files to store, and the maximum file size in megabytes (m) or bytes.
Contents To specify the types of log information to capture, click Add Content, select the Facility and the Level, and then click the check mark in the Add Content title bar. Repeat as needed until you've specified all the content that you want to capture. Only logs that meet these conditions will be saved to the specified file.

For more information about the content options, see Table 4 later in this topic.
Table 3: Users
Field Description
Add User (link) On the Users tab, you're sending log messages to the terminal session of one or more users. To add a user, click this link, and the enter the user information.

Cycle through this process as needed to specifying multiple users for different matching criteria.
User Enter one or more usernames, separated by spaces, or enter an asterisk (*) to include all users.
Match To filter messages, enter a text string. Only log messages that contain this string will be sent to the specified users.
Contents To specify the log information to capture for this user, click Add Content, select the Facility and the Level, and then click the check mark in the Add Content title bar. Repeat as needed until you've specified all the content that you want to capture. Only logs that meet these conditions will be sent to the specified users.

For more information about the content options, see Table 4 later in this topic.
Table 4: Console Options and Content Types
Field Description
Add Content (link) Use the Add Content link to specify the types of log messages to capture. You'll cycle through this process multiple times to add different content types. For example, let's say you want to capture (1) critical authorization events, (2) warnings for authorization events, (3) critical change logs, (4) change log errors, and (5) ftp errors. For this example, you'd create five content types.
Note: You can add content types in a few different places. For example, if you're working on the Console tab, you're specifying the content to send to the console. If you're working on the User tab, you're specifying the content to capture for that user.
Facility Select a log event that you want to capture in this content type.
Level For the specified log event, select the severity level to capture in this content type.
Table 5: Archive Tab
Field Description
Files Specify the maximum number of files (1-1000) to store in the system log. After this maximum is reached, log messages are archived.
Size Specify the maximum size (65536 - 1073741824) of the system log. Select either m (megabytes) or bytes. After this maximum is reached, log messages are archived.
Table 6: General Tab
Field Description
Time Format Use this option to include the milliseconds, the year, or both in the syslog timestamps.

  • To add an option, click the plus (+) button, then click the option in the list.

  • To remove an option, click the X.
Routing Instance

By default, system logging traffic is sent from the management interface on your device and its associated routing instance. However, the Junos syslog client is completely VRF aware. If a server is reachable through a virtual routing and forwarding (VRF) instance, the syslog client can send log messages to the server.

Use this option to specify a routing instance to use.
Network

Use this option to specify a network instance to use.