Customizing the Driver Configuration
MaxJumboFrameSize
MaxJumboFrameSize configures the Jumbo Frame feature of a link. The valid range of values for this parameter is 0 to 9000. If the value configured is less than 1500, the Jumbo Frame feature is disabled. Once this is configured, the ifconfig command is used to configure the desired MTU size. The default instant setting is 0:
MaxJumboFrameSize=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
For example, to configure instance 2 to support a Jumbo Frame of up to 9000 bytes, set the MaxJumboFrameSize parameter to:
MaxJumboFrameSize=0,0,9000,0,0,0,0,0,0,0,0,0,0,0,0,0; ifconfig bcme2 mtu 9000
TxPacketDescCnt
TxPacketDescCnt configures the number of Tx packet descriptors. The valid range of values for this parameter is 32 to 512. More system memory resources will be used for a larger number of Tx Packet Descriptors. The default value is 100:
TxPacketDescCnt=100;
RxStdDescCnt
RxStdDescCnt configures the number of Rx packet descriptors. The valid range of values for this parameter is 32 to 512. More system memory resources will be used for a larger number of Rx Packet descriptors. The default value is 500:
RxStdDescCnt=500;
RxJumboDescCnt
RxJumboDescCnt configures the number of Rx Jumbo packet descriptors. The valid range of values is 32 to 256. More system memory resources will be used for a larger number of Rx Jumbo packet descriptors. This parameter is only used if the Jumbo Frame feature is enabled. The default value is 50:
RxJumboDescCnt=50;
RxCoalescingTicks
RxCoalescingTicks configures the number of Rx Host Coalescing Ticks in microseconds. This determines the upper boundary of the time interval in which the device will generate an interrupt if one or more frames are received. The default value is 150:
RxCoalescingTicks=150;
RxMaxCoalescedFrames
RxMaxCoalescedFrames configures the number of Rx Maximum Coalesced Frames parameters. This determines the maximum number of Rx buffer descriptors that the device processes before it will generate an interrupt. The default value is 10:
RxMaxCoalescedFrames=10;
TxCoalescingTicks
TxCoalescingTicks configures the number of Tx Host Coalescing Ticks in microseconds. This determines maximum time interval before the device generates an interrupt if one or more frames are sent. The default value is 150:
TxCoalescingTicks=150;
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