Replacing A T640 Sib - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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Replacing a T640 SIB

424
CAUTION: Do not leave a fiber-optic transceiver uncovered except when
inserting or removing cable. The safety cap keeps the port clean and
prevents accidental exposure to laser light.
Arrange the cable in the cable management system to prevent the cable from
6.
dislodging or developing stress points. Secure the cable so that it is not supporting its
own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled
loop in the cable management system. Placing fasteners on the loop helps to maintain
its shape.
CAUTION: Do not let fiber-optic cable hang free from the connector. Do
not allow fastened loops of cable to dangle, which stresses the cable at
the fastening point.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend
radius. An arc smaller than a few inches in diameter can damage the cable
and cause problems that are difficult to diagnose.
Verify that the status LEDs on the PIC faceplate indicate that the SFP is functioning
7.
correctly (there is an LED for each SFP port). For more information about the PIC
LEDs, see the interface module reference for your device. You can also verify PIC
functioning by issuing the
T640 Preventing Electrostatic Discharge Damage on page 506
T640 PIC Description on page 79
T640 Packet Forwarding Engine Architecture on page 7
Five SIBs are installed in the T640 router. The SIBs are located in the rear of the chassis
in the slots marked SIB0 through
SIBs are hot-insertable and hot-removable.
NOTE: SIB version B is supported in Junos OS Release 7.3 and later. You can
use a SIB or SIB version B in a chassis running Junos 7.3 or later, but you cannot
use both on the same chassis at the same time.
If you use one or more FPC4s or Enhanced Scaling FPCs in a T640 router that
is not part of a routing matrix, each SIB in the router must be a SIB version B.
show chassis fpc pic-status
SIB4 . Each SIB weighs approximately 6.8 lb (3.1 kg).
command.
Copyright © 2017, Juniper Networks, Inc.