Table of Contents
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PTX5000 Packet Transport Switch Hardware Guide
PTX5000 Control Board Overview
PTX5000 Control Board Description
22
Troubleshooting the PTX5000 Cooling System on page 122
PTX5000 Control Board Description on page 22
PTX5000 Control Board LEDs on page 24
Control Board Slots on page 22
Control Board Function on page 22
Control Board Components on page 22
Control Board Slots
You can install up to two control boards in the PTX5000 Packet Transport Switch. Control
boards install into the rear of the chassis in the slots labeled
Engine installs directly into a slot on each control board. The control boards cannot
function if a Routing Engine is not present.
If the packet transport switch 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 restarts and becomes the master.
Control Board Function
Each control board works with the Routing Engine to provide the following control and
monitoring functions for the packet transport switch:
Determining Routing Engine mastership
Controlling power and reset for the other packet transport switch components
Monitoring and controlling fan speed
Monitoring system status
Control Board Components
Each control board consists of the following components (see
Ethernet switch used for intermodule communication
PCI bus to the Routing Engines
Switch Processor Mezzanine Board (SPMB)
Figure 12 on page 23
shows the control board.
and
. A Routing
CB0
CB1
Figure 12 on page
23) :
Copyright © 2012, Juniper Networks, Inc.
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Troubleshooting
