TABLE 4-3Operational Mode Parameters (Continued)

Parameter

Description

 

 

MaxFrameSize

Upper limit on the maximum MTU size the driver allows.

 

All Intel gigabit adapters (except the 82542-based Intel

 

PRO/1000 adapter) allow the configuration of jumbo

 

frames.

 

The maximum MTU accepted by the MAC is 16128. Use

 

ifconfig(1M) to configure jumbo frames. Use ifconfig

 

with the adapter instance and the MTU argument

 

(ifconfig e1000g0 mtu 16128) configures adapter

 

e1000g0 for the maximum allowable jumbo frame size.

 

Allowed values are:

 

0

= Standard frames with an MTU of 1500. (default)

 

1

= Jumbo frames with a maximum MTU of 4096.

 

2

= Jumbo frames with a maximum MTU of 8192.

 

3

= Jumbo frames with a maximum MTU of 16384.

FlowControl

Flow control utilizes Ethernet XON and unicast and

 

multicast XOFF packets to allow Ethernet equipment to

 

slow down the stream of data between two Ethernet

 

devices.

 

Allowed values are:

 

0 = Disable. Packets can get dropped in high- throughput

 

situations, leading to reduced network performance.

 

1

= Receive only.

 

2

= Transmit only.

 

3

= Receive and transmit. (default).

 

4

= Use adapter’s EEPROM-programmed factory default

 

setting.

TbiCompatibilityEnable

You must enable this feature on Intel 82543CG-based

 

copper adapters to operate correctly with TBI mode

 

ethernet hardware.

 

Allowed values are:

 

0

= Disable.

 

1

= Enable. (default).

SetMasterSlave

Controls the PHY master/slave setting. Manually forcing

 

master or slave can reduce time needed to link with Planex

 

08TX and IO data switches. This setting should remain as

 

the hardware default.

 

Allowed values are:

 

0

= Hardware default. (default).

 

1

= Force master.

 

2

= Force slave.

 

3

= Force auto.

 

 

 

Chapter 4 Configuring e1000g Driver Parameters 53

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Sun Microsystems Ethernet MMF/UTP Adapter manual Upper limit on the maximum MTU size the driver allows