Name
Values
Description
Gateway
String in decimal dot notation
IP address of the device's default gateway
DISCOVER Message
A controlling PC sends the packet with DISCOVER message to find which devices are present on its network. The
DISCOVER message should broadcast on all Ethernet interfaces of the controlling PC. After sending the DISCOVER
message packet, the PC should wait to receive DISCOVER_REPLY packets from the devices.
The controlling PC does not know how many devices are connected. Therefore, it should wait up to 5 seconds for any reply
packets to allow for any variation in time needed for the devices to reply.
Sending more than one DISCOVER packet is recommended because a single UDP packet may be lost by network switches
or the iVu BCR. The probability of multiple packets being lost is much smaller. Separate the packets in time by 100
milliseconds or more.
This and the following packet capture examples were created using a free network tracing and troubleshooting software
called Wireshark. Banner Engineering Corporation does not provide support for this product nor endorses it.
Figure 86. Wireshark DISCOVER Packet
Note: In some situations, it is possible for a PC to receive a copy of the packet it sent. This condition is
subject to the operating system and/or network configuration. If received, such a received packet should
be detected (by checking the message type) and discarded.
In this example for the DISCOVER packets, empty sections for Name, MAC, IP, NetMask and Gateway are shown. These
empty fields in the DISCOVER packet are not necessary and are an artifact of the application used to test the iVu BCR
Discovery Protocol.
DISCOVER_REPLY Message
The device sends a DISCOVER_REPLY packet in reply to a DISCOVER message. The body portion of the message
contains all of the parameters detailed in
iVu Plus BCR Gen2 Series Sensor
94
www.bannerengineering.com - Tel: + 1 888 373 6767