I've not been able to find a clear answer on this.  

 

If I have an Ethernet switch with four 2.5Gbps connections to my Unraid server, configured in LACP 802.3ad bonded mode, and a 10Gbps 'uplink'connection to a single workstation, what is the theoretical maximum bandwidth?  Again, theoretical. (see footnote 1)

 

 

Thanks in advance.

 

Footnotes:

(1) Please know in your heart that readers would swoon in admiration if you explained that the switch has to support LACP link aggregation, that networking protocols have overhead, that disks are not infinitely fast, that defective cables can slow things down, etc.  And then don't explain any of those things.  Thank you.

Theoretically it should be 10gbps.

1 hour ago, lovaan said:

Theoretically it should be 10gbps.

Thanks!  That's what I thought, but I didn't want to purchase an LACP-capable switch without some reassurance.

Along with your 2.5gbps nics and switch don't forget to get some cat6a patch cables. Technically you could get up to 10Gbps through cat5e if the cables are high enough quality and the runs are short enough, but spending a few extra bucks just to make sure makes sense to me.

3 minutes ago, lovaan said:

Along with your 2.5gbps nics and switch don't forget to get some cat6a patch cables. Technically you could get up to 10Gbps through cat5e if the cables are high enough quality and the runs are short enough, but spending a few extra bucks just to make sure makes sense to me.

I've got a massive box full of cables, most of which are CAT6A or better.  Things are a tad more complex than the diagram.  The switch that services the NAS has a 10GBase-SR Fiber Transceiver SFP+ module that goes to a matching module in another switch in my computer room.  In that switch is a a 10GB Ethernet SFP+ module, to which the workstation shown in the diagram is connected.  I may end up just making my own cables to length to go between the NAS and the switch.