Juniper PTX Series - PTX5000 Control Board Overview; PTX5000 Control Board Description; Control Board Slots; Control Board Function

• Troubleshooting the PTX5000 Cooling System on page 122
PTX5000 Control Board Overview
•
PTX5000 Control Board Description on page 22
•
PTX5000 Control Board LEDs on page 24
PTX5000 Control Board Description
•
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 CB0 and CB1. A Routing
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 Figure 12 on page 23) :
•
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.
Copyright © 2012, Juniper Networks, Inc.22
PTX5000 Packet Transport Switch Hardware Guide