Optical Ila Component Redundancy; Optical Ila Field-Replaceable Units - Juniper PTX3000 Hardware Manual

Optical ILA Component Redundancy

The following hardware components provide redundancy on the optical ILA models:
Cooling system—The optical ILA has three fan modules. Each fan module is a redundant unit containing
one fan. If a fan module fails and the remaining fan modules are unable to keep the optical ILA within
the desired temperature thresholds, chassis alarms are raised and the optical ILA can shut down.
The optical ILA ships with two power supplies that provide 1+1 redundancy. If one power supply fails
or is removed, the second power supply balances the electrical load without interruption and still provides
1+1 redundancy while the failing power supply is replaced.

Optical ILA Field-Replaceable Units

Field-replaceable units (FRUs) are components that you can replace at your site. The optical ILA FRUs are
hot-removable and hot-insertable—you can remove and replace them without powering off the optical
ILA or disrupting the optical ILA function.
CAUTION:
removal to prevent chassis overheating.
Table 4 on page 20 lists the FRUs for the optical ILA and actions to take before removing them.
Table 4: Required Actions Before Removing a FRU from the Optical ILA
FRU
Power supplies (2)
Fan modules (3)
Figure 4 on page 21 shows the FRU panel on an optical ILA.
Replace a failed fan module with a new fan module within 30 seconds of
Required Actions Before Removal
Disconnect the AC power and remove the AC power cord or cable for the power supply
unit.
Disconnect the DC power and remove the power connector.
NOTE: You need a minimum of one powered power supply for the optical ILA to operate
properly.
None.
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