Learning IOS and JUNOS

Juniper CLI learning is a little challenge for junior network engineers or Cisco IOS engineers, because the JUNOS modular and hierarchical structure design. Some features may need several command line which were configured under different hierarchical levels, then combined all of them together in another hierarchical level. Such kind of CLI design especially not easy to learn when apply CoS on juniper device.(I believe many Cisco IOS engineers don't want to switch to JUNOS because of this...) As above figure is my understanding about the related JUNOS command which is using in our production network.

Prerequisites for MPLS VPN - Route Target Rewrite The MPLS VPN - Route Target Rewrite feature requires the following: • You should know how to configure Multiprotocol Virtual Private Networks (MPLS VPNs). • You need to configure your network to support interautonomous systems (Inter-AS) with different route target (RT) values in each autonomous system (AS). • You need to identify the RT replacement policy and target router for each AS. Route Target Replacement Policy Routing policies for a peer include all configurations that may impact inbound or outbound routing table updates. The MPLS VPN - Route Target Rewrite feature can influence routing table updates by allowing the replacement of route targets on inbound and outbound BGP updates. Route targets are carried as extended community attributes in BGP Virtual Private Network IP Version 4 (VPNv4) updates. Route target extended community attributes are used to identify a set of sites and VPN routing/forwarding instanc...