Table 135: Checklist for Host Redundancy (continued)
Command or ActionMonitor Redundant Routing Engine Tasks
The active and standby Routing Engines
must be the same type of Routing Engine
and must operate the same version of
Junos OS.
1. Operate the Same Type of Routing Engine and
Junos OS on page 586
[edit]
set groups group-name
2. Use the Groups Configuration on page 586
[edit]
commit synchronize
3. Synchronize Configurations on page 588
file copy <source> <destination>4. Copy a Configuration File from One Routing
Engine to Another on page 588
request system halt5. Use the Proper Shutdown Process on a Backup
Routing Engine on page 589
Related
Documentation
Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
on page 565
•
Understanding Redundancy for the Routing Engine, Host Module, and Host Subsystem
To learn how redundant Routing Engines, host modules, and host subsystems work on
various routing platforms. You monitor these components to provide a standby Routing
Engine and controller component that will switch from standby to active, assuming
mastership when a failure brings down the active master Routing Engine.
Redundant Routing Engines are two Routing Engines that are installed in the same routing
platform. One functions as the master, while the other stands by as a backup should the
master Routing Engine fail.
Redundant host modules are two Routing Engine and Miscellaneous Control Subsystem
(MCS) pairs installed in the same routing platform. One pair functions as master, while
the other stands by as a backup should the master Routing Engine fail.
Redundant host subsystems are two Routing Engine and Control Board pairs installed
in the same routing platform. One pair functions as master, while the other stands by as
backup should the master Routing Engine fail.
The M5, M10, M7i, and M40 routers do not support Routing Engine, host module, or host
subsystem redundancy.
Related
Documentation
M10i Router Redundant Routing Engines and HCMs on page 566•
• M20 Router Redundant Routing Engines and SSBs on page 566
• M40e and M160 Router Redundant Host Modules on page 567
565Copyright © 2012, Juniper Networks, Inc.
Chapter 28: Host Redundancy Overview
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