iSCSI SSD, routing, rules, internet gateway

Good morning

I need to expose the SSDs of each Blade3 via iSCSI so that the main blade can see them as remote block devices; this will help me create a ZFS RAID.

I notice that each blade in the ClusterBox (with 4 Blade3s) is visible to the next and the previous one (excluding N1 and N4 that only see N2 and N3 respectively).

I wonder what could be the best way for my case?

In addition to wanting to better understand the basic connection mechanism, I would like to understand with which criteria and speed the various Blade3s are in communication; the problem would arise if I tried to route a connection through the eth_pci gateway.

Still regarding routing and the possibility of putting different blades in communication (e.g. ssh), could you tell me a standard routing method that is correct for this purpose.

In another topic I am asking the same question to be able to route the connection this time between each individual blade and the default internet gateway.

Thanks infinitely in advance for any suggestions.