Table 19: Power Zone Fault Tolerance
Redundant ConfigurationNonredundant ConfigurationZone
The PSM0 in PDU0 and the PSM0 in PDU1 are both
required for full power redundancy.
•
If neither PSM in this zone is powered on, the fan
trays are not powered on, and the packet transport
switch will not be powered on.
•
If both PSMs in this zone fail, the fan trays are not
powered on, which will cause the packet transport
switch to be powered off.
•
If one PSM in this zone is powered off or fails, the
configuration becomes nonredundant.
One PSM0 in either PDU can provide power
to all fan trays.
•
If the nonredundant PSM in this zone is
not powered on, the fan trays are not
powered on, and the packet transport
switch will not be powered on.
•
If the nonredundant PSM in this zone fails,
the fan trays are not powered on, which
will cause the packet transport switch to
be powered off.
0
The PSM1 in PDU0 and the PSM1 in PDU1 are both
required for full power redundancy.
•
If neither PSM in this zone is powered on, the craft
interface, host subsystems, CCGs, and SIBs are
not powered on.
•
If PSM1 in PDU0 and PSM1 in PDU1 both fail, the
craft interface, host subsystems, CCGs, and SIBs
are powered off.
•
If PSM1 in PDU0 and PSM1 in PDU1 are not online,
the craft interface, host subsystems, CCGs, and
SIBs are not powered on.
One PSM1 in either PDU can provide power
to the craft interface, both host subsystems,
both CCGs, and all nine SIBs.
•
If the nonredundant PSM in this zone is
not powered on, the craft interface, host
subsystems. CCGs, and SIBs are not
powered on.
•
If the nonredundant PSM in this zone fails,
the craft interface, host subsystems.
CCGs, and SIBs are powered off.
1
For full power redundancy for up to four FPCs, two
PSM in different PDUs is required.
NOTE: The PSM must be in different PDUs for full
power redundancy.
One to four FPCs: One PSM2 or PSM3 in
either PDU can provide nonredundant power
for up to four FPCs.
PSM2 and PSM3 in the same PDU is
nonredundant.
2
For full power redundancy for five to eight FPCs, all
four PSM–PSM2 and PSM3 in both PDU0 and
PDU1–must be present and fully functional for full
power redundancy.
If all four PSM in this zone fail, the FPCs are powered
off.
Five to eight FPCs: Two PSM in either PDU
can power up to eight FPCs.
PSM2 and PSM3 in the same PDU is
nonredundant.
CAUTION: Three PSMs are nonredundant.
Related
Documentation
PTX5000 Power Distribution Unit LEDs on page 42•
• PTX5000 Power Supply Module LEDs on page 43
• Connecting DC Power to the PTX5000 Packet Transport Switch on page 94
• Powering On the DC Powered PTX5000 Packet Transport Switch on page 96
• Maintaining the PTX5000 Power System on page 113
• Troubleshooting the PTX5000 Power System on page 139
41Copyright © 2012, Juniper Networks, Inc.
Chapter 3: PTX5000 Hardware Components Overview
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