Check for SSB Alarms

To check for SSB alarms:

1. Display the Current SSB Alarms
2. Display SSB Error Messages in the System Log File
3. Display SSB Error Messages in the Chassis Daemon Log File

Display the Current SSB Alarms

Purpose

To determine the details of the current SSB alarms.

Action

To display the current SSB alarms, use the following command:

Sample Output

2 alarms currently active
Alarm time               Class  Description
2002-06-05 19:55:57 UTC  Major  fxp0: ethernet link down

Meaning

The command output displays the alarm date, time, severity level, and description. An SSB failure or removal generates an fxp0 link alarm. The fxp0 link is the dedicated 100-Mbps Fast Ethernet link between the SSB and the Routing Engine. This link transfers routing table data from the Routing Engine to the forwarding table in the Internet Processor ASIC. The link also transfers, from the SSB to the Routing Engine, routing link-state updates and other packets destined for the router that have been received through the router interfaces.

Display SSB Error Messages in the System Log File

Purpose

To determine the details of the SSB error messages in the system log file.

Action

Periodically check the system log messages on the management console for messages sent by the SSB. During normal operation, the SSB notifies the Routing Engine of any errors it detects.

To display the SSB error messages in the system log file, use the following CLI command:

Sample Output

Jul 10 13:28:45 myrouter /kernel: fxp1: media DOWN 100Mb / full-duplex
Jul 10 13:28:45 myrouter /kernel: fxp1: media DOWN 10Mb / half-duplex
Jul 10 13:28:45 myrouter /kernel: fxp1: media DOWN 100Mb / full-duplex
Jul 10 13:28:45 myrouter /kernel: fxp1: link UP 100Mb / full-duplex
Jul 10 13:28:45 myrouter rpd[564]: EVENT <UpDown> fxp1.0 index 1 <Up Broadcast Multicast> address #0 0.a0.a5.12.1d.6d
Jul 10 13:28:45 myrouter mib2d[563]: SNMP_TRAP_LINK_UP: ifIndex 2, ifAdminStatus up(1), ifOperStatus up(1), ifName fxp1
[...Output truncated...]

Meaning

The messages system log file records the time the failure or event occurred, the severity level, a code, and a message description. You can also use the show log messages | match ssb command to see error messages that are generated when an SSB fails or is offline. Use this information to diagnose a problem and to let the Juniper Networks Technical Assistance Center (JTAC) know what error messages were generated and the router events that occurred before and after the problem. For more information about system log messages, see the Junos OS System Log Messages Reference.

Display SSB Error Messages in the Chassis Daemon Log File

Purpose

To determine the details of the SSB error messages in the chassis daemon log file.

Action

To display the SSB error messages in the chassis daemon (chassisd) log file, use the following command:

Sample Output

Jul 10 13:27:28 SSB0 is now not present
Jul 10 13:27:28 Assert reset on SSB0
Jul 10 13:27:28 Turn on ethernet loop
[...Output truncated...]

Meaning

The command output displays the SSB hardware version level, part number, and serial number.