Juniper Networks MX480 - Manual (Page 194)

Figure 86: Installing the Fan Tray
Related
Documentation
Preventing Electrostatic Discharge Damage to an MX480 Router on page 248 •
Replacing MX480 Host Subsystem Components
• Effect of Taking the MX480 Host Subsystem Offline on page 170
• Taking an MX480 Host Subsystem Offline on page 172
• Operating and Positioning the MX480 SCB Ejectors on page 173
• Replacing an MX480 SCB on page 174
• Replacing an MX480 Routing Engine on page 184
• Replacing an SSD Drive on an RE-A-1800 or RE-S-1800 on page 186
• Replacing Connections to MX480 Routing Engine Interface Ports on page 188
Effect of Taking the MX480 Host Subsystem Offline
The host subsystem is taken offline and brought online as a unit. Before you replace an
SCB or a Routing Engine, you must take the host subsystem offline. The host subsystem
is hot-pluggable.
Normally, if two host subsystems are installed in the router, Routing Engine 0 ( RE0 )
functions as the master and Routing Engine 1 ( RE1 ) functions as the backup. You can
remove the backup host subsystem (or either of its components) without interrupting
the functioning of the router. If you take the master host subsystem offline, the backup
host subsystem becomes the master (the router might reboot, depending on your
configuration). If the router has only one host subsystem, taking the host subsystem
Copyright © 2013, Juniper Networks, Inc. 170
MX480 3D Universal Edge Router Hardware Guide