Table of Contents
Advertisement
JUNOSe 11.1.x Service Availability Configuration Guide
Activating High Availability
The switch route processor (SRP) module can operate in one of the two redundancy
modes file system synchronization and high availability. When you activate high
availability, the router uses mirroring to keep the configuration and state of the
standby SRP module coordinated with the configuration and state of the active SRP
module.
To activate high availability:
1.
2.
Related Topics
Guidelines for Deactivating High Availability
You can disable high availability (stateful SRP switchover) by launching Redundancy
Configuration mode and issuing the mode file-system-synchronization command
or specifying the no mode command.
In the file-system-synchronization mode, the router synchronizes the files and data
such as configuration files and releases that are stored in NVS (nonvolatile storage)
between the primary and standby SRP modules. This is the default behavior mode
for E Series routers that contain redundant SRPs.
Because this mode uses file synchronization instead of transaction-based mirroring,
when the active SRP module switches to the standby SRP, the router cold-starts.
Related Topics
42
Activating High Availability
From Global Configuration mode, launch Redundancy Configuration mode.
host1(config)#redundancy
In Redundancy Configuration mode, specify high availability as the redundancy
mode.
host1(config-redundancy)#mode high-availability
Stateful SRP Switchover Redundancy Modes on page 27
Guidelines for Activating High Availability on page 41
redundancy
mode
Stateful SRP Switchover Redundancy Modes on page 27
Deactivating High Availability on page 43
redundancy
mode
Advertisement
Table of Contents
