ESXi 6.0 Update 1a has been released. If you have been following KB2124669 in regards to the the NETDEV WATCHDOG issue causing an ESXi host to hang. The update is now available.
If you are currently running ESXi 6.0/6.0U1 you can use update manager to install the update.
If you are looking to install ESXi 6.0 U1 from scratch or update from a previous version you should make sure you update to use the latest ISO.