# Monitoring Logging System Events

Use the show log configuration command to display your log configuration. Use the show log data command to display system events on your screen.

You can use the output filtering feature of the show command to include or exclude lines of output based on a text string you specify. See show Commands in JunosE System Basics Configuration Guide for details.

show log configuration

- Use to show the logging configuration on your system.
- Example 1—Factory defaults are set

      host1#show log configuration
        log destination console severity WARNING
        log destination nv-file severity CRITICAL
        no log engineering
        log fields timestamp instance no-calling-task
        no log severity

              category            severity   verbosity   filters
      -------------------------   --------   ---------   -------
      NameResolverLog             ERROR      low
      aaaAtm1483Cfg               ERROR      low
      aaaEngineGeneral            ERROR      low
      aaaServerGeneral            ERROR      low
      addressServerGeneral        ERROR      low
      atm                         ERROR      low
      atm1483                     ERROR      low
      atmAal5                     ERROR      low
      bgpConnections              ERROR      low
      ...
      cliCommand                  NOTICE     low
      controlNetworkSlave         ERROR      low
      cops                        ERROR      low
      ...
      udpTraffic                  ERROR      low

- Example 2—Individual log udpTraffic is set to warning

      host1#(config)#log severity warning udpTraffic
      host1##show log configuration
        log destination console severity WARNING
        log destination nv-file severity CRITICAL
        no log engineering
        log fields timestamp instance no-calling-task
        no log severity

              category            severity   verbosity   filters
      -------------------------   --------   ---------   -------
      NameResolverLog             ERROR      low
      aaaAtm1483Cfg               ERROR      low
      aaaEngineGeneral            ERROR      low
      aaaServerGeneral            ERROR      low
      addressServerGeneral        ERROR      low
      atm                         ERROR      low
      atm1483                     ERROR      low
      atmAal5                     ERROR      low
      bgpConnections              ERROR      low
      ...
      cliCommand                  NOTICE     low
      controlNetworkSlave         ERROR      low
      cops                        ERROR      low
      ...
      udpTraffic                  WARNING*   low

      * Default severity setting is overridden by the individual log severity setting.

- Example 3—Log severity is set to alert

      host1#(config)#log severity alert
      host1#show log configuration
      log destination console severity WARNING
      log destination nv-file severity CRITICAL
      no log engineering
      log fields timestamp instance no-calling-task
      log severity ALERT

              category            severity   verbosity   filters
      -------------------------   --------   ---------   -------
      NameResolverLog             ALERT#     low
      aaaAtm1483Cfg               ALERT#     low
      aaaEngineGeneral            ALERT#     low
      aaaServerGeneral            ALERT#     low
      addressServerGeneral        ALERT#     low
      atm                         ALERT#     low
      atm1483                     ALERT#     low
      atmAal5                     ALERT#     low
      bgpConnections              ALERT#     low
      ...
      cliCommand                  ALERT#     low
      controlNetworkSlave         ALERT#     low
      cops                        ALERT#     low
      ...
      udpTraffic                  ALERT#     low

      * Default severity setting is overridden by the system-wide severity setting.

- Example 4—Individual log atm is set to severity warning

      host1#(config)#log severity warning atm
      host1#show log configuration
      log destination console severity WARNING
      log destination nv-file severity CRITICAL
      no log engineering
      log fields timestamp instance no-calling-task
      log severity ALERT

              category            severity   verbosity   filters
      -------------------------   --------   ---------   -------
      NameResolverLog             ALERT#     low
      aaaAtm1483Cfg               ALERT#     low
      aaaEngineGeneral            ALERT#     low
      aaaServerGeneral            ALERT#     low
      addressServerGeneral        ALERT#     low
      atm                         WARNING*   low
      atm1483                     ALERT#     low
      atmAal5                     ALERT#     low
      bgpConnections              ALERT#     low
      ...
      cliCommand                  ALERT#     low
      controlNetworkSlave         ALERT#     low
      cops                        ALERT#     low
      ...
      udpTraffic                  ALERT#     low

      * Default severity setting is overridden by the system-wide severity setting.

      * Default severity setting is overridden by the individual log severity setting.

- See show log configuration.

show log data

- Use to display system events.
- Use keywords to select which events are displayed:
  - category—Limits the display to a single log event category. See the CLI online Help for available categories.
    - Example
      host1#show log data category os
  - delta—Limits the display to events that occurred after the time set with the log baseline command.
  - nv-file—Displays the information that is currently logged to nonvolatile storage.
    - Example

          host1# show log data nv-file
          logFile.temp: The system cannot find the file specified.
          ALERT 09/12/2000 21:29:17 os: ASSERTION FAILED: file mplsNvs2.cc, line 789
          ALERT 09/20/2000 02:18:06 os: ASSERTION FAILED: file osPool.cc, line 819
          ALERT 09/20/2000 02:26:35 os: ASSERTION FAILED: file osPool.cc, line 819
          ALERT 09/20/2000 02:44:33 os: ASSERTION FAILED: file osPool.cc, line 819
          ALERT 09/20/2000 04:56:35 os: ASSERTION FAILED: file osPool.cc, line 819
          ALERT 09/27/2000 03:10:25 os: ASSERTION FAILED: file
          /sw0/sc/nvs/include/../nvMapBackend.h, line 235
          ALERT 10/02/2000 04:05:42 os: ASSERTION FAILED: file osHeap.cc, line 439
          ALERT 10/02/2000 04:08:04 os: ASSERTION FAILED: file osMessageQueue.cc, line
          42, rip1
          ALERT 10/12/2000 03:43:38 os: PANIC: file osSemaphore.cc, line 54
          ALERT 11/01/2000 02:03:49 os: ASSERTION FAILED: file cliCommand.cc, line 195

  - severity—Displays events that have a specific severity level.
    - Example

          host1# show log data severity notice
          NOTICE 01/10/2001 00:59:50 os: config -- using running
          NOTICE 01/10/2001 00:59:52 os: srp application, build date: 0x3a437424 (FRI DEC 22 2000 15:32:52 UTC)
          NOTICE 01/10/2001 00:59:52 os: last reset: user reboot, reason: not specified
          NOTICE 01/10/2001 00:59:52 os: OsIsrRegistrar: 0xb
          NOTICE 01/10/2001 00:59:52 os: OsIsrRegistrar: 0xa
          NOTICE 01/10/2001 00:59:52 os: OsIsrRegistrar: 0x2

- By combining keywords, you can further limit the information displayed. See the CLI online Help for information about the keywords available at each level.
  host1#show log data nv-file severity alert
- See show log data.