For a test/demo environment I'm using a VDX 6730 with NOS 2.1.1, which needs to be upgrade to NOS 4.1.3 (latest supported version). During upload of 4.1.3 the VDX complained it needs to upgrade to 4.0.0 first (and probably 3.0.0 before that). But these versions are no longer downloadable. Any recommendation?
I was told were to get NOS 4.0.2b, so I could upgrade to that version first. This solved that issue.
You need to update to 3.0 first, then 4.0, then 4.1.3 if you want to keep your config intact. Every version ever released is available under "downloads" on the MyBrocade portal.