HPE FlexNetwork HSR6800 Configuration Manual page 42

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PXE server address, which is used to obtain the boot file or other control information from the
PXE server.
1. Format of Option 43:
Figure 16 Option 43 format
Network configuration parameters are carried in different sub-options of Option 43 as shown
in Figure
Sub-option type—The field value can be 0x01 (ACS parameter sub-option), 0x02 (service
provider identifier sub-option), or 0x80 (PXE server address sub-option).
Sub-option length—Excludes the sub-option type and sub-option length fields.
Sub-option value—The value format varies by sub-option.
2. Sub-option value field formats:
ACS parameter sub-option value field—Includes the ACS URL, username, and
password separated by spaces (0x20) as shown in
Figure 17 ACS parameter sub-option value field
Service provider identifier sub-option value field—Includes the service provider
identifier.
PXE server address sub-option value field—Includes the PXE server type that can only
be 0, the server number that indicates the number of PXE servers contained in the
sub-option, and server IP addresses, as shown in
Figure 18 PXE server address sub-option value field
Relay agent option (Option 82)
Option 82 is the relay agent option. It records the location information about the DHCP client. When
a DHCP relay agent receives a client's request, it adds Option 82 to the request and sends it to the
server.
The administrator can use Option 82 to locate the DHCP client and further implement security control
and accounting. The DHCP server can use Option 82 to provide individual configuration policies for
the clients.
16.
Figure
Figure
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18.