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3.2.5.5 Receiving an Information-request Message

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Increment the DHCPv6ServerMibInfo.Informs element, a shared ADM element (see [MS-DHCPM] section 3.1.1.1), as described in section 1.4, point 17.

When a DHCPv6 server implementing this specification receives an Information-request message containing OPTION_ORO (Option 6) with OPTION_USER_CLASS (Option 15) as the only requested option, the DHCPv6 server SHOULD<45> send a DHCPACK message to the DHCPv6 client containing one or more User Class Options (one for each User Class configured on the DHCPv6 server) in the format specified in section 2.2.4. If other options are also requested in the message, the DHCPv6 server MAY<46>respond to the message. If the message is not an Information-request message, the option request MUST be silently discarded.

If the DHCPv6 Information-request message contains the Rogue Detection Request option (section 2.2.10.1):

  • An Administratively Authorized Server<47> that is Rogue Aware SHOULD<48> reply to the DHCPv6 Information-request message by sending a DHCPv6 Reply message containing the Rogue Detection Reply option (section 2.2.10.2) with a non-empty NULL-terminated string in the option data.

  • A Rogue Authorized Server on the network SHOULD<49> reply to the DHCPv6 Information-request message by sending a DHCPv6 Reply message containing the Rogue Detection Reply option (section 2.2.10.2) with an empty NULL-terminated string in the option data.

If processing of the Information-request message results in the server sending a DHCPv6 Reply message to the client, then increment the DHCPv6ServerMibInfo.Replies element, a shared ADM element (see [MS-DHCPM] section 3.1.1.1), as described in section 1.4, point 17.