When a second rack controller is added, when the initial rack controller is already providing DHCP, it is automatically added as a secondary for the VLAN (that has DHCP enabled). I confirmed this (in the web UI) before submitting this issue. Apologies for not having included that information.
When a second rack controller is added, when the initial rack controller is already providing DHCP, it is automatically added as a secondary for the VLAN (that has DHCP enabled). I confirmed this (in the web UI) before submitting this issue. Apologies for not having included that information.