Table 9. DOS and OS/2 NDIS device driver parameters in PROTOCOL.INI (continued)
Parameter | Explanation | |
MaxTxFrameSize (OS/2 | This parameter specifies the maximum frame size that can be transmitted on the LAN. The | |
only) | parameter value serves as an upper limit. The actual maximum frame size might be smaller. | |
| The maximum frame size supported by the NDIS device driver is the lesser of the following | |
| values: |
|
| v The value of this MaxTxFrameSize parameter | |
| v Total Receive Buffer Area (see the MinRcvBuffs parameter) | |
| v The physical frame size capacity of the network (4500 bytes for | |
| 18,200 bytes for | |
| Do not count the 4 bytes of FCS defined for a frame when setting this parameter value. | |
| In some environments, performance can be increased by operating server and client at | |
| larger frame sizes. Protocol frame size should be adjusted if this parameter is changed. | |
| Note: Some | |
| Valid values: 14 to 18,000 | |
| The default is 4500. | |
|
| |
MinRcvBuffs (OS/2 only) | This parameter specifies the minimum number of receive buffers that are allocated. The | |
| Total Receive Buffer Area for the adapter is calculated using the following formula: | |
| Total Receive Buffer Area = MinRcvBuffs ⋅ RcvBuffSize | |
| Note: To receive the maximum length frame that is supported by the attached network, the | |
| Total Receive Buffer Area must be larger than the maximum frame size that is allowed for | |
| the network, which is 4500 bytes for | |
| ||
| A smaller Total Receive Buffer Area will use less system memory but will correspondingly | |
| reduce the size of the largest frame that can be received by the NDIS device driver. The | |
| maximum frame size supported by the driver can be further limited by the MaxTxFrameSize | |
| parameter. | |
| Valid values: 1 to 512 | |
| The default is 20. | |
|
| |
RcvBuffSize (OS/2 only) | This parameter specifies the size of each receive buffer. | |
| Valid values: 256 to 18 000 | |
| The default is 2252. | |
|
| |
FullDuplex | This parameter permits the device driver to activate | |
| supported by the network. The MaxTxFrameSize parameter may need to be adjusted | |
| separately, depending on network requirements. | |
| Valid values: | |
| Yes | Permits |
| No | Prohibits |
The default is Yes.