Linking two linux machines together. Do I need LAG or no LAG configuration on Netgear switch?

[milp]

I'm a bit unsure on if and how I should configure an LAG.

Scenario:

I have two linux machines (names "linuxA" and "linuxB", hardware supermicro, OS CentOS 😎 linked together via direct cable in a linux-only LAG. The LAG, made up of a fiber port (p8) and a copper port (p6) from each linux machine is working fine and is reliable. 

• linuxA(p8) <-- FO link --> linuxB(p8)
• linuxA(p6) <-- copper link --> linuxB(p6)

• linuxA-bond0(p6,p8)   (this equals the LAG on machine linuxA)
• linuxB-bond0(p6,p8)   (this equals the LAG on machine linuxB)

There are some upcoming architecture changes and I now need to and put a netgear switch in between the two linux machines.

• linuxA(p8) <--> switch <--> linuxB(p8)
• linuxA(p6) <--> switch <--> linuxB(p6)

The switch is a stack of a M4300-12X12F and a M4300-24X. 

• linuxA(p8) <--> 1/0/3 switch 1/0/5 <--> linuxB(p8)
• linuxA(p6) <--> 2/0/3 switch 2/0/5 <--> linuxB(p6)

1/0/3, 1/0/5,  2/0/3 and 2/0/5 are in a completely separate VLAN which is not connected to anything else.

Now my question(s):

• Do I have to create a LAG with for 1/0/3 and 2/0/3 ?
• Do I have to create a LAG with for 1/0/5 and 2/0/5 ?
• If yes, what kind of LAG hash mode do I need to choose?
• The linux bond mentions LACP rate slow.  I guess I would have to configure that too on the switch, but I did not find where i could do that.

Thanks for any hint.

Dan

[schumaku]

The mentioned slow LACP Rate does set how how fast the bonded interfaces should transmit LACPDU packets. The default is every 30 seconds, characterized by the lacp_rate value of "0" or "slow", or every second, characterized by the lacp_rate value of "1" or "fast". This has no impact on the possible bonding link (LACP) performance.

[milp]

Thanks @schumaku , I know what LACP rate is (frequency of LACP PDU updates sent via the link) and that it has nothing to do with the LAG speed. I was just interested where to configure this on a Netgear. 

Apparently it only works by CLI and setting "lacp_rate". Thanks for the hint.

Any idea on the other questions?

Thanks

Dan