Taking The Host Subsystem Offline In A Nonredundant Host Subsystem - Juniper PTX5000 Hardware Manual

Installing the RE-PTX-X8-64G Routing Engine in a Nonredundant Host Subsystem | 504
Verifying the Upgrade and Configuring the Routing Engine in a Nonredundant Host Subsystem | 504
In a nonredundant host subsystem, only one Routing Engine and one Control Board are present in the
chassis.
To upgrade the existing Routing Engine to the RE-PTX-X8-64G Routing Engine, perform the following
steps.

Taking the Host Subsystem Offline in a Nonredundant Host Subsystem

Before you replace a Routing Engine, you must take the host subsystem offline. The host subsystem is
taken offline and brought online as a unit. Be aware of the effect of taking a host subsystem offline on
traffic, forwarding, and routing. See
Offline" on page 462.
Halt the host subsystem.
1. To halt the host subsystem use the request vmhost halt command.
user@host> request vmhost halt
Halt the system ? [yes,no] (no) yes
*** FINAL System shutdown message from user@host ***
System going down IMMEDIATELY
Terminated
...
syncing disks... 11 8 done
The operating system has halted.
Please press any key to reboot.
NOTE: The request vmhost halt command halts the Routing Engine on the control plane from
which it was issued. The command shuts down the Routing Engine cleanly, so its state
information is preserved. The SIBs might continue forwarding traffic for approximately 5
minutes after the request vmhost halt command has been issued. To reboot a Routing Engine
that has been halted, you must connect through the console.
"Understanding the Effect of Taking the PTX5000 Host Subsystem
500