Use Dhcp - Kramer KDS-USB2 User Manual

Kramer Electronics Ltd.

3.11 Use DHCP

Sent by a client to a device to tell a device that it should use DHCP to obtain an IP. This message may
be sent as either as a UDP broadcast packet or a packet directed to a specific IP in the case that the
device has a valid, known static IP address already. Regardless of whether the message was sent as
a broadcast or not, the device will only switch into DHCP mode if the Target MAC Address field
matches the MAC address of the device. When a valid Use DHCP message is received the device will
send an Acknowledge message from its current IP address before discarding its static address
configuration and beginning acquisition of an IP address via DHCP. If a Use DHCP message is
received when the device is already in DHCP mode, the device will send an Acknowledge message,
but this will not trigger any other action on the device such as IP renewal. The client is able to tell
which mode a device is in by inspecting the Network Acquisition Mode field of the Reply Device
Information message.
3.11.1 Field Descriptions
Target MAC Address
Byte Offset
+-----------------------------------------+-----------------------------------------+
0 | Magic Number
+
2 |
+-----------------------------------------+-----------------------------------------+
4 | Message ID
+
6 |
+-----------------------------------------+-----------------------------------------+
8 | Protocol Version = 3
+-----------------------------------------+-----------------------------------------+
10 | Target MAC Address
+
12 |
+
14 |
+-----------------------------------------+-----------------------------------------+
SwitchableUSB – 3
The MAC address of the device which will be set to use DHCP to obtain
an IP address.
Supported Messages
| Command = 6
|
+
|
|
+
|
|
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+
|
+
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