Juniper Networks M5, M10 manual User@host show chassis fpc pic-status

Maintain Packet Forwarding Engine Components

•Issue the CLI show chassis fpc pic-statuscommand. The PIC slots in an FPC are numbered from 0 through 3, right to left:

user@host> show chassis fpc pic-status

Slot 0 Online

PIC 0 4x OC-3 SONET, MM

PIC 1 1x CSTM1, SMIR

PIC 3 2x OC-3 ATM, MM Slot 1 Online

PIC 0 1x OC-12 SONET, MM

PIC 1 1x OC-12 ATM, MM

PIC 2 2x OC-3 ATM, MM

PIC 3 2x OC-3 ATM, MM

For further description of the output from the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

•Use the cable management system (shown in Figure 11) to support cables and prevent cables from dislodging or developing stress points.

•Place excess cable out of the way in the cable management system. Do not allow fastened loops of cable to dangle from the connector or cable management system, because this stresses the cable at the fastening point. Putting fasteners on the loops helps to maintain their shape.

•Keep the cable connections clean and free of dust and other particles, which can cause drops in the received power level. Always inspect cables and clean them if necessary before connecting an interface.

•Label both ends of PIC cables to identify them.

The following guidelines apply specifically to fiber-optic cable:

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When you unplug a fiber-optic cable from a PIC, always place a rubber safety plug over the transceiver on the PIC faceplate and on the end of the cable.

Anchor fiber-optic cable to avoid stress on the connectors. When attaching fiber to a PIC, be sure to secure the fiber so it is not supporting its own weight as it hangs to the floor. Never let fiber-optic cable hang free from the connector.

•Avoid bending fiber-optic cable beyond its bend radius. An arc smaller than a few inches can damage the cable and cause problems that are difficult to diagnose.

•Frequent plugging and unplugging of fiber-optic cable into and out of optical instruments, such as ATM or SONET/SDH analyzers, can cause damage to the instruments that is expensive to repair. Instead, attach a short fiber extension to the optical equipment. Any wear and tear due to frequent plugging and unplugging is then absorbed by the short fiber extension, which is easy and inexpensive to replace.

•Keep fiber-optic cable connections clean. Small micro-deposits of oil and dust in the canal of the transceiver or cable connector could cause loss of light, reducing signal power and possibly causing intermittent problems with the optical connection.

Maintain Hardware Components 77