Message Flow - Banner iVu Plus TG Series Instruction Manual

iVu Plus TG and Color Gen2 Image Sensors
3. If the above field(s) match the device's equivalent:
a. The device compares the new values with the current values.
b. If the new values are the same as the current values, the device discards the packet and no further reply is
generated.
c. If the new values are different from the current values, the device set its IP address, subnet mask, and
default gateway to match what is in the packet.
• The device performs only syntactic checks on the supplied data. It will not perform gateway
presence or duplicate IP address checks.
• The change is logged in iVu system log as a success
• A DISCOVER_REPLY packet is sent by the device back to the request originator
• The device reboots after approximately 1 second

14.5.3 Message Flow

The following are examples of typical message flows for various interactions with the device.
Discovery of a Device
1. The PC broadcasts as DISCOVER message.
Only the header values need to be filled:
• The Protocol ID field should be set to 0x6956752b, "iVu+"
• The Message Type field should be set to 0x44495343, "DISC"
• The Correlation tag should be set by the sender to the non-zero value that will allow the sender to identify
the response.
The packet with the header values is sent using the broadcast address of 255.255.255.255.
Note: Not all the switches are configured to pass broadcast packets by default. A switch
configuration change may be necessary to enable the passing of broadcast packets.
2. Upon receipt of the broadcast message the device verifies that the message is addressed to it by comparing the
Protocol ID field to value 0x6956752b.
• If the value matches, the device examines the Message Type field.
• If the value does not match any of the commands, the device discards the packet.
• If the Message Type field matches 0x44495343, "DISC", the device prepares the response in the form of
DISCOVER_REPLY packet:
The Protocol ID field is set to 0x6956752b, "iVu+"
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The Message Type field is set to 0x52504c59, "RPLY"
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◦ The Correlation Tag is copied from the received message
The body of the message is populated with the following fields, separated by a comma:
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128
Figure 177. Wireshark DISOVER_REPLY with New IP Address
SerialNumber ("SerialNumber=P01238710163241048")
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▪ Version ("Version=TB_v1.1.4")
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