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SRP Modules

The router uses a 1:1 redundancy scheme for the SRP module. When two SRP modules are installed in the router, one acts as the primary (active) and the second as a redundant (standby) module. Both SRP modules share a single SRP IOA located in the rear of the chassis. After you install two SRP modules, the modules negotiate for the primary role. A number of factors determine which module becomes the primary; however, preference is given to the module in the lower-numbered slot. The SRP modules record their latest roles and retain them the next time you power up the system.

If the standby SRP module detects that the primary SRP module is not active (and high-availability mode is not enabled), it reboots the system and takes control. If high-availability mode has been enabled, automatic switchover occurs with near hitless failover. For information about configuring and managing SRP module redundancy, see JUNOSe System Basics Configuration Guide, Chapter 6, Managing Modules.

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