Sun Microsystems 806-2989-10 manual 5defines the enableipg0 and ipg0 parameters

TABLE 4-5defines the enable_ipg0 and ipg0 parameters.

TABLE 4-5Parameters Defining enable_ipg0 and ipg0

Parameter	Values	Description
enable_ipg0	0	enable_ipg0 reset
	1	enable_ipg0 set (Default=8)
ipg0	0 to 255	The additional time delay (or gap) before
		transmitting a packet (after receiving the
		packet) (Default=8)

The ce device supports the programmable Interpacket Gap (IPG) parameters ipg1 and ipg2. The total IPG is the sum of ipg1 and ipg2. The total IPG is 0.096 microseconds for the link speed of 1000 Mbps.

TABLE 4-6lists the default values and allowable values for the IPG parameters.

TABLE 4-6Read-Write Interpacket Gap Parameter Values and Descriptions

Parameter	Values	Description
	(Byte-time)
ipg1	0 to 255	Interpacket gap 1 (Default = 8)
ipg2	0 to 255	Interpacket gap 2 (Default = 4)

By default, the driver sets ipg1 to 8-byte time and ipg2 to 4-byte time, which are the standard values. (Byte time is the time it takes to transmit one byte on the link, with a link speed of 1000 Mbps.)

If your network has systems that use longer IPG (the sum of ipg1 and ipg2), and if those machines seem to be slow in accessing the network, increase the values of ipg1 and ipg2 to match the longer IPGs of other machines.

30 Sun GigaSwift Ethernet Adapter Installation and User’s Guide • February 2001