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What does 0xDD TLV mean in NAP DHCP vendor specific information RRS feed

  • Question

  • I found following TLVs are contained in DHCP vendor specific information sent by NAP:

     

    0xDC: Contains SoH & SoHR, in case NAPAgent & IAS, following
          sequence can be captured:
          Client                        Server
            |  DISCOVER: 0xDC 0x00       |
            |--------------------------->|
            |  OFFER: 0xDC 0x03 "NAP"    |
            |<---------------------------|
            |  REQUEST: 0xDC SoH         |
            |--------------------------->|
            |  ACK: 0xDC SoHR            |
            |<---------------------------|
          There is only one SoH/SoHR exchange can be observed, who can

          tell me whether there's more SoH/SoHR pairs?

     

          We can find additional DHCPINFORM / DHCPACK with following
          sequence after the DICOVER sequence:
          Client                        Server
            |  INFORM: 0xDC 0x01 0x00    |
            |--------------------------->|
            |  ACK: 0xDC 0x03 "NAP"      |
            |<---------------------------|
            |  INFORM: 0xDC SoH          |
            |--------------------------->|
            |  ACK: 0xDC 0x03 "NAP"      |
            |<---------------------------|


          When client's health has changed, we can find following
          sequence:
            |  REQUEST: 0xDC 0x01 0x00   |
            |--------------------------->|
            |  ACK: 0xDC 0x03 "NAP"      |
            |<---------------------------|
            |  REQUEST: 0xDC SoH         |
            |--------------------------->|
            |  ACK: 0xDC SoHR            |
            |<---------------------------|
    0xDD: If any, always be T=0xDD L=0x04 V=0x00FFFFFF (Quarantine?)
          This TLV can always be found in DHCPACK when client is
          restricted.
    0xDE: Contains network instance ID (GUID) and timestamp of this
          transaction. Value is encoded in UTF-16BE, i.e.
          {898AD4B0-3B49-41E0-A19D-BE8B54A606FE} - 2007-09-04 22:19:28.168Z
          This TLV can always be found in client packets
          (i.e. DHCPDISCOVER/DHCPREQUST/DHCPINFORM)

     

    My question is what does 0xDD TLV mean? How many SoH/SoHR pairs

    will occur in the above sequence?

     

    Best regards/Lv Zheng

     

    Friday, September 7, 2007 5:05 AM

Answers

  •  

    Hi,

     

    The requested information is available in the protocol specification which we make it available under the license agreement.

     

    If you are interested, please contact me at naplic at Microsoft dot com.

     

    Thanks.

     

    Regards,

    Calvin Choe

     

     

     

    Monday, September 24, 2007 9:12 PM