9
Customer Network and Private Network Settings
The B3075 has two Ethernet ports that are used for BACnet/IP communication, referred to as the
“Customer port” and the “Private port”. Those two ports have different capabilities that correspond to the
expected use of the B3075.
Note: The Customer port is connected to the “Customer network,” and the Private port is connected
to the “Private network.” In one common deployment scenario, the Customer network is configured
and managed by the IT network team, whereas the Private network is configured and managed by
the BAS integrator.
The B3075’s ports used for BACnet/IP communication must be assigned a valid IP address and network
mask that are appropriate for the IP networks to which the ports will be directly connected. Both the
Private port and the Customer port can be configured with static IP protocol settings, and in most cases
this will be appropriate. However, the Customer port can be configured to use DHCP to obtain certain
network settings if the IP network to which it is connected has a DHCP server.
Note: Although the B3075 can be configured to use DHCP to obtain an IP address and other
network parameters, the product is a BACnet anchor point used to maintain the integrity of the
building automation network. As such, the stability of this product in the IP network environment is
critical. For reliable system operation, the B3075’s BACnet ports need to be assigned unchanging
IP addresses and (if required) unchanging DNS names. If DHCP is used, ask the administrator of
the DHCP server for a “DHCP Reservation” for the B3075.
The Default Gateway parameter must be configured if a B3075 port is directly connected to a BACnet/IP
network that consists of multiple IP subnets. If the BBMD function is enabled on the Customer port, then
the Customer port’s Default Gateway must be configured. The BACnet UDP Port typically has the value
47808 for both the Customer port and the Private port, but a different UDP port can be configured for each
port if appropriate.
The system integrator is responsible for choosing unique BACnet Network Numbers for each of the BACnet
networks in a system. A BACnet Network Number is chosen from the range 1 to 65,534. Each of the
B3075’s BACnet router ports must be configured with the BACnet Network Number that was chosen for
the BACnet network to which the port is connected.
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