2.2.2 DHCPv4 Option Code 43 (0x2B) - Vendor-Specific Information Option
DHCPv4 clients request vendor-specific options from the DHCPv4 server by including option code 43 in the Parameter Request List, as specified in [RFC2132] section 8.4.
DHCPv4 clients implementing this specification MUST also include a vendor-class identifier as described in section 2.2.3 in the DHCPv4. A Validating Server MAY include a vendor-class identifier when authorizing itself using Rogue Detection.
When a DHCPv4 message includes a Vendor Class Identifier with one of the values defined in section 2.2.3, the Vendor-Specific Information Option is defined to use the "Encapsulated vendor-specific options" format specified in [RFC2132] section 8.4. This specification defines the following encapsulated vendor-specific option codes.
|
Value |
Meaning |
|---|---|
|
0x01 |
Microsoft Disable NetBIOS Option (section 2.2.2.1) |
|
0x02 |
Microsoft Release DHCP Lease on Shutdown Option (section 2.2.2.2) |
|
0x03 |
Microsoft Default Router Metric Base Option (section 2.2.2.3) |
|
0x5E |
Rogue Detection Request Option (section 2.2.2.4) |
|
0x5F |
Rogue Detection Option (section 2.2.2.5) |
The ANDROID_METERED option is specified in section 2.2.2.6.<2>
In addition, DHCPv4 clients that support NAP also use DHCPv4 vendor-specific options for exchanging NAP-specific information. For an overview of NAP and for more information, see [MS-DHCPN] and [TNC-IF-TNCCSPBSoH]. NAP utilizes vendor-specific options as defined in [MS-DHCPN] section 2.2.1.
For information about the format of DHCP Vendor Extensions, see [RFC2132] section 2 and [RFC3315] section 22.