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• Service provider identifier, which is acquired by the CPE from the DHCP server and sent to the
ACS for selecting vender-specific configurations and parameters. For more information about
CPE and ACS, see Network Management and Monitoring Configuration Guide.
• PXE server address, which is used to obtain the boot file or other control information from the
PXE server.
• AC address, which is used by an AP to obtain the boot file or other control information from the
AC.
1. Format of Option 43:
Figure 19 Option 43 format
Network configuration parameters are carried in different sub-options of Option 43 as shown
in Figure 19.
{ 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 20.
Figure 20
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 21.
Figure 21 PXE ser
ver address sub-option value field
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