Yes you can use all the 4 Eth ports on your VNXe Unit from each SP , the document is only for demonstrating how it works. If you want to use link aggregation then each eth port needs to link aggregated with eth2. Example eth2/eth3/eth4/eth5 or eth2/eth3 or eth2/eth4 or eth2/eth5 or anyother combination with eth2 like eth2/eth3/eth4, in short all link aggregation has to be done with eth2 you cannot link aggregate eth3/eth4. For failover to work correctly all physical port connection for SPA and SPB should be similar , since you have stacked switches it can go to any switch. VNXe uses LACP for link aggregation it doen not support Etherchannel protocol.
Brand new Noob here to the VNXe 3300 and need assistance with a connectivity diagram.  I have parsed through all the documentation I can find - VNXe HA, blogs, forums and other websites. What I am looking for is a good solid setup HA network diagram for:  1) VNXe 3300 with Qty (4) 1GB ethernet ports for SPA & SPB.  2) iSCSI, NFS, Shared Folder, Exchange 2010 and VM use (VM's will use both iSCSI and NFS).  3) Qty (2) Cisco 2960-S switches (Stacked - NO 10GB).   Should I be only using Qty (2) eth ports like the documentation or can I use all 4 ports? Just getting confused because iSCSI and NFS documented diagrams appear to be both be using eth2 & 3. Should I be splitting up onto eth3 & 4? Just confused at this point.
VNXe 3300 with stacked switches - Diagram