Network Bridging Queriable Object Identifiers
The following list summarizes the object identifiers that are used to obtain operational characteristics for NDIS drivers and describes how the bridge driver should respond to a request for each characteristic.
| OID name | Description | Bridge response |
|---|---|---|
| OID_GEN_SUPPORTED_LIST | List of supported object identifiers | All object identifiers that are listed in this section |
| OID_GEN_HARDWARE_STATUS | Hardware status | NdisHardwareStatusReady |
| OID_GEN_MEDIA_SUPPORTED | Media types supported (encoded) | NdisMedium802_3 only |
| OID_GEN_MEDIA_IN_USE | Media types in use (encoded) | NdisMedium802_3 only |
| OID_GEN_MAXIMUM_LOOKAHEAD | Maximum lookahead size of receive, in bytes | = OID_GEN_RECEIVE_BLOCK_SIZE (the bridge driver always provides the full packet to higher-level drivers) |
| OID_GEN_MAXIMUM_FRAME_SIZE | Maximum frame size, in bytes | 1500 (this object identifier is specified to no include the size of frame headers) |
| OID_GEN_LINK_SPEED | Link speed in units of 100 bps | Maximum link speed reported by any bound NIC driver |
| OID_GEN_TRANSMIT_BUFFER_SPACE | Transmit buffer space | 15K (reported as number of bytes) |
| OID_GEN_RECEIVE_BUFFER_SPACE | Receive buffer space | 150K (reported as a number of bytes) |
| OID_GEN_TRANSMIT_BLOCK_SIZE | Minimum amount of storage, in bytes, that a single packet occupies in the transmit buffer space of the NIC | 1514 (the maximum Ethernet frame size) |
| OID_GEN_RECEIVE_BLOCK_SIZE | Amount of storage, in bytes, that a single packet occupies in the receive buffer space of the NIC | 1514 (the maximum Ethernet frame size) |
| OID_GEN_VENDOR_ID | Vendor NIC code | 0xFFFFFF (No IEEE-registered Vendor code) |
| OID_GEN_VENDOR_DESCRIPTION | Vendor network card description | "Microsoft MAC Bridge" |
| OID_GEN_VENDOR_DRIVER_VERSION | Vendor-assigned version number of the driver | MAC Bridge driver version number |
| OID_GEN_CURRENT_PACKET_FILTER | Current packet filter (encoded) | Current value of the packet filter for this binding |
| OID_GEN_CURRENT_LOOKAHEAD | Current lookahead size in bytes | 1514 (the maximum Ethernet frame size) |
| OID_GEN_DRIVER_VERSION | NDIS version number used by the driver | NDIS version in use by bridge NIC (currently 5.0) |
| OID_GEN_MAXIMUM_TOTAL_SIZE | Maximum total packet length in bytes | 1514 (the maximum Ethernet frame size) |
| OID_GEN_MAC_OPTIONS | Optional NIC flags (encoded) | NDIS_MAC_OPTION_NO_LOOPBACK ONLY (the bridge driver does not handle loopbacks internally) |
| OID_GEN_MEDIA_CONNECT_STATUS | Indicates if the NIC is connected to the network | NdisMediaStateConnected if at least one NIC is in this state; NdisMediaStateDisconnected if all NICs are in that state |
| OID_GEN_MAXIMUM_SEND_PACKETS | The maximum number of send packets the driver can accept per call to its MiniportSendPackets function | A large number (currently 0xFF) |
| OID_GEN_SUPPORTED_GUIDS | The custom Globally Unique Identifier (GUID) supported by the miniport | Not supported |
| OID_GEN_PHYSICAL_MEDIUM | Physical media supported by the miniport (encoded) | Not supported |
See Also
Network Bridging Object Identifiers
Last updated on Friday, April 09, 2004
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