Troubleshooting the TX Matrix TX-SIBs and the Switching Planes
Problem
The following alarms, LEDs, command output, and conditions indicate a problem with the TX-SIBs or switching planes:
- The red FAIL LED below a TX-SIB on the craft interface is lit.
- TX or RX LED next to a fiber-optic array adapter is lit red
- The RX LED next to a fiber-optic array adapter is lit yellow.
Solution
To troubleshoot the switching plane connections between the TX-SIBs in the TX Matrix router and the T640-SIBs in the T640 routers:
- Verify that the TX-SIBs and T640-SIBs are online by issuing
the show chassis sibs command:
user@host> show chassis sibsscc-re0: -------------------------------------------------------------------------- Slot State Uptime 0 Spare 133 days, 12 minutes, 41 seconds 1 Online 133 days, 12 minutes, 41 seconds 2 Online 133 days, 12 minutes, 41 seconds 3 Online 133 days, 12 minutes, 41 seconds 4 Online 133 days, 12 minutes, 41 seconds lcc0-re0: -------------------------------------------------------------------------- Slot State Uptime 0 Spare 133 days, 12 minutes, 2 seconds 1 Online 133 days, 12 minutes, 2 seconds 2 Online 133 days, 12 minutes, 2 seconds 3 Online 133 days, 12 minutes, 2 seconds 4 Online 133 days, 12 minutes, 2 seconds
- Verify the state of the electrical and optical switch fabric
links by issuing the show chassis fabric sibs command:
user@host> show chassis fabric sibsscc-re0: -------------------------------------------------------------------------- Fabric management SIB state: SIB #0 plane state: S_SPARE LCC #0 : Links ok SIB #1 plane state: S_ACTIVE LCC #0 : Links ok SIB #2 plane state: S_ACTIVE LCC #0 : Links ok SIB #3 plane state: S_ACTIVE LCC #0 : Links ok SIB #4 plane state: S_ACTIVE LCC #0 : Links ok lcc0-re0: -------------------------------------------------------------------------- Fabric management SIB state: SIB #0 plane state: S_SPARE FPC #0 PFE #0 : Links ok PFE #1 : Links ok SCC : Links ok SIB #1 plane state: S_ACTIVE FPC #0 PFE #0 : Links ok PFE #1 : Links ok SCC : Links ok SIB #2 plane state: S_ACTIVE FPC #0 PFE #0 : Links ok PFE #1 : Links ok SCC : Links ok SIB #3 plane state: S_ACTIVE FPC #0 PFE #0 : Links ok PFE #1 : Links ok SCC : Links ok SIB #4 plane state: S_ACTIVE FPC #0 PFE #0 : Links ok PFE #1 : Links ok SCC : Links okVerify that the state of each link is Links ok.
- Display the system log messages to obtain information
about link failures. The /var/log/messages file is a commonly
configured destination for system log messages. To display it, issue
the show log messages command:
user@host> show log messagesFor more information about system log messages, see the Junos System Log Messages Reference.
Your customer support representative can assist you with using the information in the system log, along with the supplied fiber-optic array loopback connector and adapter, to determine if you have a faulty TX-SIB, T640-SIB, or fiber-optic array cable.
Caution: Do not connect and disconnect a fiber-optic array cable connector, a loopback connector, or a loopback adapter more frequently than required to perform the procedures in this hardware guide. These fiber-optic components are rated for a limited number of insertions (approximately 100).
- If the red FAIL LED below a TX-SIB on the craft interface is on, look at the display on the craft interface to check the status of the TX-SIB.
- If an RX LED next to a fiber-optic array adapter is lit yellow, the fiber-optic array cable plugged into the adapter might be connected to the wrong T640-SIB. Check that the fiber-optic array cable is connected as specified in Fiber-Optic Array Cable Connections between TX-SIBs and T640-SIBs.
- If a TX or RX LED next to a fiber-optic array adapter is lit red, look at the display on the craft interface to check the status of the TX-SIB. If an RX LED is lit red, the corresponding receive link either has detected errors or is not functioning normally.
- Make sure the TX-SIB is properly seated in the midplane. Check that each ejector handle has been turned clockwise and is tight.
