MPLS
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Nonstop active routing (NSR) support for controller-initiated RSVP label-switched paths (LSPs) (MX Series, PTX Series, and QFX Series)—Starting in Junos OS Release 21.1R1, we support NSR for controller-initiated RSVP-based point-to-point (P2P) and point-to-multipoint (P2MP) LSPs. The primary Routing Engine synchronizes all RSVP LSPs initiated by Path Computation Elements (PCEs), including multicast flow specifications for any PCE-initiated P2MP LSPs, with the backup Routing Engine. This ensures zero traffic loss for the traffic carried over PCE-initiated RSVP LSPs during Routing Engine switchovers. This feature is enabled when NSR is configured.
[See PCEP Configuration.]
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BGP Classful Transport planes (BGP-CT) to facilitate service mapping over colored tunnels (ACX Series, PTX Series, MX Series)—Starting in Junos OS Release 21.1R1, you can classify colored transport tunnels (RSVP, IS-IS flexible algorithm) in your network into transport classes and map service routes over an intended transport class. You can also extend the transport tunnels to span across multiple domains (ASs or IGP areas) by using the new BGP transport address family called BGP Classful Transport (BGP CT).
This feature lays the foundation for network slicing and allows the different domains to interoperate irrespective of the transport signaling protocols used in each domain.