Table 9. DOS and OS/2 NDIS device driver parameters in PROTOCOL.INI (continued)
| Parameter | Explanation | |
| LoopBack | Determines whether or not the adapter will copy a frame that it is transmitting if the | |
| 
 | destination address is recognized by the adapter. | |
| 
 | Valid values: | |
| 
 | Yes | Indicates that transmit frames whose destination is this adapter will be transmitted | 
| 
 | 
 | and then received by the adapter. | 
| 
 | No | Indicates that transmit frames whose destination is this adapter must be looped | 
| 
 | 
 | back by the protocol stack. | 
| 
 | The default is No. | |
| 
 | 
 | |
| TxPriMax | This parameter specifies the value of the maximum token access priority that will be allowed | |
| 
 | for frames sent on the  | |
| 
 | Frame Control priority value exceeds the value of this parameter will have their token access | |
| 
 | priority reduced to the value specified by this parameter. Frame Control is a field in the IEEE | |
| 
 | 802.2 Logical Link Control (LLC) header. | |
| 
 | Valid values: 0 to 6 | |
| 
 | The default is 6. | |
| 
 | 
 | |
| TxPriThresh | This parameter specifies the frame priority value that will be used to transmit on the | |
| 
 | adapter’s  | |
| 
 | setting (in the Frame Control field) that is equal to or greater than the value of this | |
| 
 | parameter are treated as  | |
| 
 | Valid values: 1 to 6 | |
| 
 | The default is 1. | |
| 
 | 
 | |
| LLCOnly | This parameter indicates whether only LLC frames should be copied by the adapter when it | |
| 
 | is running in promiscuous copy mode. If this parameter is set to Yes, no MAC frames will be | |
| 
 | copied while in promiscuous copy mode. | |
| 
 | Valid values: | |
| 
 | Yes | Copy only LLC frames. | 
| 
 | No | Copy all frames on the ring. | 
| 
 | The default is No. | |
| 
 | 
 | |
| EOIDelay (OS/2 only) | This parameter should always be set to zero. It is intended for debug use. | |
Valid values: 0 to 10
The default is 0.
Appendix B. NDIS 2 device driver parameters 55
