So I just got and started to setup a 40g network for my 3 node cluster.
I'm using connectx3 pro cards with dual qsfp ports.
here is my interfaces file:
auto lo
iface lo inet loopback
auto enp6s0
iface enp6s0 inet manual
mtu 9000
auto enp1s0
iface enp1s0 inet manual
mtu 9000...