I have heard junosphere is EoL? Is this correct. If so what is the replacement for this product. Please also provide a link to subscribe to this new service for testing and custom lab set up. '
What is the bets way to learning about Juniper SP or ENT switching using such a tool?
This is the Juniper TSB article announcing the End Of Life.
Try using vLab to simulate Juniper device (such as vMX, vSRX, vQFX). It's a web-based platform that lets you try out Juniper products and feature.
Follow the steps guided - its all for free.