Restrictions
Primary Routing Engine
For devices with multiple Routing Engines, you can only connect to the primary Routing Engine. If you attempt to connect to the backup Routing Engine, the Device.open() method fails with an exception.
Junos OS Software Upgrade
The primary restriction is on software-install functionality provided by the jnpr.junos.utils.sw module. The software-install process is currently designed to support simple deployment scenarios. The expected use case for this software is deploying new equipment. The following scenarios are supported:
- Standalone devices with a single Routing Engine, for example EX4200 switches
- Standalone devices equipped with dual Routing Engines, for example MX960 routers
- EX Series Virtual Chassis in non-mixed-mode configurations (all devices use the same Junos OS software package)
- Deployment configurations that do not have any form of "in-service" features enabled, such as unified ISSU and NSSU.
The following scenarios are known not to be supported:
- SRX Series chassis clusters
- EX Series Virtual Chassis in mixed-mode configurations (devices use different Junos OS software packages)
- Virtual Chassis Fabric (VCF)
- MX Series Virtual Chassis
- Any deployments with "in-service" configurations enabled (such as unified ISSU or NSSU)