Connectionless Networking Requirements

96. Network adapter and driver support promiscuous mode

This ensures that the adapter can be used with Microsoft Network Monitor Agent. This requirement applies only to LAN (non-switched) media.

Notice that, by default, promiscuous mode is not turned on. Enabling promiscuous mode should be possible only by using the Microsoft Network Monitor Agent or another similar administrative application.

97. Network adapter and driver support multicast promiscuous mode

By supporting this feature, the adapter and the driver enable performance improvements for special-purpose servers and applications, such as multicast routers. This requirement applies to those networking technologies that support multicast, such as Ethernet, and not to those that do not support multicast, such as Token Ring.

Notice that, by default, multicast promiscuous mode is not turned on.

98. Network adapter and driver support priority for IEEE 802-style networks

Windows Quality of Service (QoS) components provide link layer priority information to NDIS 5.0 miniport drivers in each transmitted packet’s NDIS_PER_PACKET_INFO structure. Priority values are derived by mapping Internet Engineering Task Force (IETF) Integrated Services (intserv) service types to 802.1p priority values (referred to as the “user priority” object in http://search.ietf.org/internet-drafts/draft-ietf-issll-is802-svc-mapping-01.txt, which is likely to be superceded by a later draft or final specification). The intserv service type used for the mapping is determined by QoS-aware applications or on behalf of the application, by QoS-aware operating system components.

802.1p/q-capable Ethernet drivers are expected to use the priority level indicated in the NDIS_PER_PACKET_INFO structure to generate the corresponding field in the 802.1p/q MAC headers of transmitted packets. Similarly, these drivers are expected to extract the appropriate information from the MAC headers of received packets and to copy the priority to the NDIS_PER_PACKET_INFO structure before indicating the packet to higher protocol layers.

Note that any link layer driver may interpret the priority information in the NDIS_PER_PACKET_INFO structure and use it as appropriate for the particular media.

For more information, see “Packet Support for 802.1p Priority” in the Windows 2000 DDK. See also “QoS: Assigning Priority in IEEE 802-style Networks,” available at http://www.microsoft.com/devdes/qos802.htm.

Modem Requirements

• 
  Traditional serial modems
  

• 
  Networking modems (Public Switched Telephone Network (PSTN) modem configured as networking devices, ADSL modems, cable modems)
  

In an enterprise, the modem servers may support hundreds of modems, used primarily for inbound remote data access such as for an ISP or corporate network. The modems are typically connected to public networks on high-speed digital lines (T1, ISDN, or PRI). Different servers may be used for dedicated incoming fax reception or IVR. Note that Windows 2000 Unimodem and Telephony Application Program Interface (TAPI) can be used to support hundreds of modems for each server.

• 
  For modems designed for Basic servers, the most important additional design issues are:
  
• 
  Support for V.90, as host side modems where possible, which requires an ISDN BRI or other digital network connection.
  
• 
  Do not migrate the modem signaling function, for example, V.90 or V.34, into the system.
  
• 
  For SOHO Server modems, the most important design issues are:
  
• 
  Adaptive answering features: V.8, V.8bis, V.251.
  
• 
  Full duplex voice strongly recommended, using V.253, to support small scale Interactive Voice Response.
  
• 
  For Enterprise Server modems, the most important design issues are:
  
• 
  The NDIS 5.0 miniport interface is preferred.
  
• 
  Fax is optional, not mandatory, because the most common solutions use separate hardware and drivers, on separate public network connections.
  

99. System includes WAN communications device

Recommended

The following device options, as defined later in this chapter, can meet this requirement:

• 
  Serial modem with V.34 and V.90 capabilities, supporting server fax capabilities (two or more ports recommended)
  
• 
  ISDN adapter (NDIS driver) or ISDN modem (Unimodem driver)
  
• 
  ATM adapter (NDIS driver)
  
• 
  ADSL adapter (NDIS driver)
  
• 
  Cable modem (NDIS driver)
  

Note: It is recognized that OEMs supply systems to customers in situations where the customer will insert modem devices at the end-user site or where the customer has particular feature demands. Server systems designed for specific customers are exempt from these requirements.

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