Control Board Slots; Control Board Function; Control Board Cb-Ptx Components - Juniper PTX5000 Hardware Manual

Packet transport router

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PTX5000 Packet Transport Router Hardware Guide

Control Board Slots

Control Board CB-PTX Components on page 84

Control Board CB2-PTX Components on page 86

You can install up to two Control Boards in the PTX5000. Control Boards install into the

rear of the chassis in the slots labeled

into a slot on each Control Board. The Control Boards cannot function if a Routing Engine

is not present.

If the PTX5000 contains a redundant host subsystem, one host subsystem functions as

the master and the other as its backup. If the master fails or is removed, the backup

becomes the master. The backup becomes the master automatically only if graceful

Routing Engine switchover (GRES) is enabled. Otherwise, manual intervention is required

for a host subsystem to acquire mastership.

Each Control Board works with the Routing Engine to provide the following control and

monitoring functions for the packet transport router:

Determining Routing Engine mastership

Controlling power and reset for the other packet transport router components

Monitoring and controlling fan speed

Monitoring system status

Each Control Board consists of the following components :

Ethernet switch used for intermodule communication

PCI bus to the Routing Engines

Switch Processor Mezzanine Board (SPMB)

Figure 51 on page 85

shows the Control Board faceplate.

. A Routing Engine installs directly

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