In-band and out-of-band must be in different subnets.
DHCP can be configured on only one of the interfaces. Otherwise DHCP would get two default routes.
Only one gatewayip must be configured. It can be configured either under the out-of-band or in-band settings.
If vlans will be used for the in-band configuration, then the vlan must be configured and made Active in SEFOS prior to doing in-band network configuration.