Hello,
1/ JNCIE-SP exam curriculum
http://www.juniper.net/us/en/training/certification/service_provider_track.html#jnciesp
The 8-hour format of this exam requires that candidates build a service provider network consisting of multiple MX series routers. Successful candidates will perform system configuration on all devices, implement various protocols, policies and VPNs, HA capabilities, and Class of Services.
Exam topics MAY include:
Device Infrastructure
IGP
MPLS
BGP
VPNs
Multicast
CoS
You should be able to use SRX to learn all of the above topics but You won't be able to recreate ALL and ANY scenario which is supported on MX-series. Exceptions include:
- Graceful Routing Engine Switchover (GRES) - requires 2 Routing Engines
- Nonstop Routing - ditto
- Nonstop Bridging - ditto
- some advanced 802.1Q tag manipulation techniques
- BRAS/BNG
2/ To put SRX into packet-mode, use
delete security
set security forwarding-options family mpls mode packet-based
set security forwarding-options family iso mode packet-based
set security forwarding-options family inet6 mode packet-based
You may need to reboot Your SRX device after that.
HTH
Thanks
Alex