Juniper Networks M160 manual Maintaining PICs and PIC Cables, Show chassis Fpc pic-status

M160 Internet Router Hardware Guide

Maintaining PICs and PIC Cables

To maintain PICs and PIC cables, follow these guidelines:

Check the LEDs on PIC faceplates. Most PIC faceplates have an LED labeled STATUS. Some PICs have additional LEDs, often one per port. The meaning of the LED states differs for various PICs. For more information, see the M160 Internet Router PIC Guide. If the FPC that houses the PIC detects a PIC failure, the FPC generates an alarm message to be sent to the Routing Engine.

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

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

Protocols, Class of Service, and System Basics Command Reference.

Use the cable management system (shown in Figure 21) 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.

134 Maintaining Packet Forwarding Engine Components