Contemporary Control Systems BASrouter Installation Guide (Firmware 2.x) - Manual (Page 17)

TD071200-0IK
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NOTE: Although they may share the same Ethernet physical
network, BACnet Ethernet devices as well as BACnet/IP devices
must have their own unique network number and these two
networks cannot communicate unless their messages pass
through a router. These network numbers must be in the range
of 1–65534 (0 and 65535 are reserved). If the BACnet Ethernet
network value is left at its default value of 0, the BACnet
Ethernet function within the BASRT-B will be disabled. Also,
to prevent erratic traffic due to message loops, an IP subnet
must have only one router enabled for BACnet Ethernet!
6.3 BACnet/IP Parameters
6.3.1 BACnet/IP UDP Port (Default Value = 0xBAC0)
This 16-bit hex value (BAC0–BACF) is set to BAC0 by default.
Usually, this default value should not be changed. In typical
networks, each BACnet/IP device will have the same UDP port
6.3.2 BACnet/IP Network ( Default Value = 1)
Like all networks in the BACnet internetwork, the BACnet/IP
network must have a unique number (1–65534). Do not use
addresses 0 or 65535 since these addresses are reserved.
6.3.3 IP Address (Default Value = 192.168.92.68)
The IP address of the router can be 0.0.0.1–255.255.255.254. A
private address is usually assigned to the BASRT-B.
6.3.4 IP Subnet (Default Value = 24)
This value (0–30 in the ―slash‖ notation) is the number of bits
with a ―1‖ in the mask. The default value of 24 corresponds to
255.255.255.0 in the dotted decimal format. All devices on the
same subnet which communicate via BACnet/IP should use the
same subnet mask.
6.3.5 IP Gateway (Default Value = 192.168.92.1)
The default gateway for the IP stack is a dotted decimal number
in the range of 0.0.0.0–255.255.255.254. This will be the IP
address of your local IP router — if one exists.