HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Conf - Page 37

Format of Option 43,

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• Service provider identifier, which is acquired by the Customer Premises Equipment (CPE) from the DHCP server and sent to the ACS for selecting vender-specific configurations and parameters. • Preboot Execution Environment (PXE) server address, which is used to obtain the bootfile or other control information from the PXE server. 1. Format of Option 43 Network configuration parameters are carried in different sub-options of Option 43 as shown in Figure 18. Figure 18 Option 43 format { Sub-option type-Type of a sub-option. The field value can be 0x01 (an ACS parameter sub-option), 0x02 (a service provider identifier sub-option), or 0x80 (a PXE server address sub-option). { Sub-option length-Length of a sub-option excluding the sub-option type and sub-option length fields. { Sub-option value-Value of a sub-option. The value format varies with sub-options. 2. Format of the sub-option value field of Option 43 { As shown in Figure 19, the value field of the ACS parameter sub-option contains variable ACS URL, ACS username, and ACS password separated by spaces (0x20): Figure 19 ACS parameter sub-option value field { The value field of the service provider identifier sub-option contains the service provider identifier. { Figure 20 shows the format of the value field of the PXE server address sub-option. The value of the PXE server type can only be 0. The server number field indicates the number of PXE servers contained in the sub-option. The server IP addresses field contains the IP addresses of the PXE servers. 29

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29
•
Service provider identifier, which is acquired by the Customer Premises Equipment (CPE) from the
DHCP server and sent to the ACS for selecting vender-specific configurations and parameters.
•
Preboot Execution Environment (PXE) server address, which is used to obtain the bootfile or other
control information from the PXE server.
1.
Format of Option 43
Network configuration parameters are carried in different sub-options of Option 43 as shown
in
Figure 18
.
Figure 18
Option 43 format
{
Sub-option type
—Type of a sub-option. The field value can be 0x01 (an ACS parameter
sub-option), 0x02 (a service provider identifier sub-option), or 0x80 (a PXE server address
sub-option).
{
Sub
-
option length
—Length of a sub-option excluding the sub-option type and sub-option length
fields.
{
Sub-option
value
—Value of a sub-option. The value format varies with sub-options.
2.
Format of the sub-option value field of Option 43
{
As shown in
Figure 19
, the value field of the ACS parameter sub-option contains variable ACS
URL, ACS username, and ACS password separated by spaces (0x20):
Figure 19
ACS parameter sub-option value field
{
The value field of the service provider identifier sub-option contains the service provider
identifier.
{
Figure 20
shows the format of the value field of the PXE server address sub-option. The value of
the PXE server type can only be 0. The server number field indicates the number of PXE servers
contained in the sub-option. The server IP addresses field contains the IP addresses of the PXE
servers.