Ptx10004 Component Redundancy - Juniper PTX10004 Hardware Manual

Packet transport router
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NOTE:
Line cards and the cable management system are not part of the base or redundant
configuration. You must order them separately.
NOTE:
If you want to purchase additional power supplies (AC, DC, HVAC, or HVDC), SIBs, or
RCBs for your router configuration, you must order them separately.
SEE ALSO
PTX10004 Routing and Control Board Description | 62
JNP10K-PWR-AC2 Power Supply | 54
JNP10K-PWR-DC2 Power Supply | 56
PTX10004 Switch Interface Board Description | 68

PTX10004 Component Redundancy

The PTX10004 router is designed so that no single point of failure can cause the entire system to fail. The
following major hardware components in the redundant configuration provide redundancy:
Routing and Control Board (RCB)—The RCB consolidates the Routing Engine function with the control
plane function in a single unit. The PTX10004 router can have one or two RCBs. When two RCBs are
installed, one functions as the primary and the other functions as the backup. If the primary RCB (or
either of its components) fails, the backup can take over as the primary. See
Control Board Description" on page
Switch Interface Boards (SIBs)—The PTX10004 has six SIB slots for the JNP10004-SF3 SIBs. The switch
fabric requires a minimum of three SIBs (BASE3 configuration) to provide the minimum switching
functionality to a PTX10004 router. You can install up to six SIBs (PREM3 configuration), which is required
for 14.4 Tbps line card support. However, a fully-loaded PTX10004 chassis with PTX10K-LC1201-36CD
line cards is not a redundant configuration. See the
page
68.
Power supplies—The system requires three power supplies for minimum operation (two RCBs, two fan
trays, three SIBs, and no line cards). The three power supplies provide n+1 redundancy for systems
running 4.8-Tbps line cards and can tolerate a failure of a single power supply without system interruption.
If one power supply fails in a fully redundant system, the other power supplies can provide full power
62.
"PTX10004 Switch Interface Board Description" on
"PTX10004 Routing and
30

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