Junos OS High Availability Library
Junos OS documentation is release independent. This means that for any given guide (except release notes), you can find all of the content for all supported releases in one place.
To determine if a feature is supported by a specific platform or Junos OS release, refer to the Junos OS release notes, Feature Explorer, the new Release History tables in the documentation, and the release information in the CLI content.
Junos OS has high availability features that provide redundancy and reliability for packet-based communications. These features provide a high level of fault tolerance and reduce network downtime and traffic interruption. Routing Engine redundancy, graceful Routing Engine switchover, graceful restart, nonstop active routing, nonstop bridging, unified ISSU, Virtual Chassis (only on MX Series 3D Universal Edge routers), and VRRP are examples of high availability features supported by Junos OS.
