From my point of view the study guides from Harry Reynolds are the best option as first step for your preparation towards JNCIE-SP. You can download them directly from Juniper Website as PDF:
You need more training in IGP loop prevention and connecting IGP islands, then you should take a look at Gonzalo Gomez Herrero and Jan Anton Bernal Van Der Ven book „Network Mergers and Migrations: Junos® Design and Implementation“. A very good source for informations about migration szenarios.
- Basic QoS
- Securing Control Plane
- Exploring IPv6
- Advanced IPv6
- Deploying MPLS (including some stuff about Layer2 VPNs)
Build your own MX 😉
You wanna know more about the MX-Series features, including a detailed documentation of Trio chipset and forwarding in MX. Learn about hierarchical schedulers, firewall filters for Control Plane Protection, built-in DDOS prevention and high availability options. Then you should read the MX-Series book by Douglas Richard Hanks Jr. and Harry Reynolds:
Back to basics:
If you need an in deep view how each protocol work your best choice will be Joseph M. Soricelli JNCIS-M book. You can download it directly from Juniper Website as PDF:
- JNCIS-M Study Guide
I didn’t read any workbook from iNET Zero/Proteus or Twine, so I can’t suggest them. But maybe you have some experience with them and leave comment! Do you know more good sources of informations for JNCIE-SP?