This object sets the packet consumption/forwarding mode for this IP interface: routingAndMgmt(0) enables both IP routing and local packet consumption, mgmtOnly(1) disables forwarding but allows local consumption, and routingOnly(2), the default, disables local consumption but allows forwarding. Admins set this to mgmtOnly(1) on a dedicated management interface that should never forward transit traffic, or routingAndMgmt(0) on an interface that needs both routing and local services like SNMP or SSH. Leaving this at the default routingOnly(2) means the interface forwards IP traffic but does not accept locally-destined packets like management protocol traffic.