Deleting Statement from JunOS Configuration
Here example for deleting a statement from JunOS Configuration.  I use BGP configuration for example.

IBGP require all BGP systems within the AS are a fully meshed, so that any external routing information is redistributed among all routers within the AS. 

This procedure will explain how to recover JunOS password.

Olive is PC running JunOS not in Juniper machine. Not like Cisco IOS that have Dynamips as ready to use IOS simulator, there is no ready to use JunOS simulator yet.

This post will show example of configuring firewall filter to protect routing engine in Juniper.  In Junos, to protect router itself (local routing engine) against attack, like DDoS attack, and TCP Sync attack, or unauthorized access, can be created using firewall filter then apply filter in loopback interface. This post will describe examples for protecting local routing engine against unauthorized access, also icmp, and tcp floods.

Before configuring BGP, you need gather information about your network and peer. Basically, configuring BGP on Juniper router is the same with Cisco or another router. Basic configuration is just configure BGP session the advertise our network.