According to the BACnet protocol documentation:

Provides access to the configuration and properties of network ports of a device. All BACnet devices shall contain at least one Network Port object per physical port which the device can be configured to communicate BACnet through (unless the port is currently for communications on a network other than the current BACnet internetwork and this use precludes its use for the current BACnet internetwork). It is a local matter whether or not Network Port objects exist for non-configured ports. It is a local matter whether or not the Network Port object is used for non-BACnet ports.

Objects of type networkPort have the following properties:

•ackedTransitions

•apduLength

•autoSlaveDiscovery

•bacnetIpGlobalAddress

•bacnetIpMode

•bacnetIpMulticastAddress

•bacnetIpNatTraversal

•bacnetIpUdpPort

•bacnetIpv6Mode

•bacnetIpv6MulticastAddress

•bacnetIpv6UdpPort

•bbmdAcceptFdRegistrations

•bbmdBroadcastDistributionTable

•bbmdForeignDeviceTable

•changesPending

•command

•description

•eventDetectionEnable

•eventEnable

•eventMessageTexts

•eventMessageTextsConfig

•eventState

•eventTimeStamps

•fdBbmdAddress

•fdSubscriptionLifetime

•ipAddress

•ipDefaultGateway

•ipDhcpEnable

•ipDhcpLeaseTime

•ipDhcpLeaseTimeRemaining

•ipDhcpServer

•ipDnsServer

•ipSubnetMask

•ipv6Address

•ipv6AutoAddressingEnable

•ipv6DefaultGateway

•ipv6DhcpLeaseTime

•ipv6DhcpLeaseTimeRemaining

•ipv6DhcpServer

•ipv6DnsServer

•ipv6PrefixLength

•ipv6ZoneIndex

•linkSpeed

•linkSpeedAutonegotiate

•linkSpeeds

•macAddress

•manualSlaveAddressBinding

•maxInfoFrames

•maxMaster

•networkInterfaceName

•networkNumber

•networkNumberQuality

•networkType

•notificationClass

•notifyType

•objectIdentifier

•objectName

•objectType

•outOfService

•profileLocation

•profileName

•propertyList

•protocolLevel

•referencePort

•reliability

•reliabilityEvaluationInhibit

•routingTable

•slaveAddressBinding

•slaveProxyEnable

•statusFlags

•tags

•virtualMacAddressTable