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 high-priority transmit channel. High-priority transmit frames whose

 

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 high-priority transmit queue. IEEE 802.2 LLC frames that contain a frame priority

 

setting (in the Frame Control field) that is equal to or greater than the value of this

 

parameter are treated as high-priority frames.

 

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

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IBM 16/4 Token-Ring manual TxPriMax, Valid values 0 to