CCIE here. I did all my certs by self study. If you want to go CCNA > CCNP > CCIE, I advise building a small lab. If you just want to learn without getting a related job you can go the virtualization route (GNS3) or simulation (packet tracer). It also depends on which track you choose CCNA R&S, CCNA Voice or CCNA Security. I had a few classes for other certifications but to be honest you can do them by yourself and using the internet.