ERSPAN
Encapsulated Remote Switch Port ANalyzer (ERSPAN) is a protocol implemented by Cisco hardware allowing to mirror traffic from a switch to another machine for analysis. Traffic is encapsulated in ERSPAN on top of GRE (Generic Routing Encapsualtion).
Available to all SRX running 12.3X48+
Available to all MX running 20.2R1+
Available to all vSRX running 20.3R1+