R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

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The DHCP client can obtain the following information through Option 43:
• Auto-Configuration Server (ACS) parameters, including the ACS URL, username, and password.
• 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. For
more information about CPE and ACS, see Network Management and Monitoring Configuration
Guide.
• 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:
Figure 14 Format of Option 43
Network configuration parameters are carried in different sub-options of Option 43 as shown
in Figure 14.
{ Sub-option type—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—Excludes the sub-option type and sub-option length fields.
{ Sub-option value—The value format varies with sub-options.
2. Sub-option value field formats:
{ ACS parameter sub-option value field—Contains variable ACS URL, username, and password
separated by spaces (0x20) as shown in Figure 15.
Figure 15 ACS paramet
er sub-option value field
{ Service provider identifier sub-option value field—Contains the service provider identifier.
{ PXE server address sub-option value field—Contains 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 16.
URL of ACS (variable)
User name of ACS (variable)
20
Password of ACS (variable)
20