If enable_ipg0 is disabled, the value of ipg0 is ignored and no additional delay is set. Only the delays set by ipg1 and ipg2 will be used. Disable enable_ipg0 if other systems keep sending a large number of back-to-back packets. Systems that have enable_ipg0 set might not have enough time on the network.

You can add the additional delay by setting the ipg0 parameter from 0 to 255, which is the media byte time delay.

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 systems seem to be slow in accessing the network, increase the values of ipg1 and ipg2 to match the longer IPGs of other machines.

42 Sun GigaSwift Ethernet Adapter Installation and User’s Guide • August 2004

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Sun Microsystems GigaSwift Ethernet Adapter manual 5Parameters Defining enableipg0 and ipg0
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GigaSwift Ethernet Adapter specifications

The Sun Microsystems GigaSwift Ethernet Adapter is a high-performance network interface card that was designed to provide advanced connectivity solutions for enterprise environments. Launched in the early 2000s, this adapter caters to the increasing demands for speed and efficiency in networking, especially amidst the rise of data-intensive applications.

One of the standout features of the GigaSwift Ethernet Adapter is its capability to support gigabit Ethernet technology, delivering data transfer rates of up to 1 Gbps. This allows organizations to boost their network throughput significantly, ensuring that bandwidth-intensive applications, such as video conferencing, online collaboration, and large file transfers, can be handled without significant lag or disruption.

The adapter utilizes a PCI-X interface, which enhances its performance compared to traditional PCI interfaces. This allows for higher bandwidth operations, making the GigaSwift suitable for servers and workstations that require robust connectivity. It is backward compatible with earlier Ethernet standards, which means it can seamlessly communicate with existing network infrastructures, preserving investments in legacy technologies.

Another critical characteristic of the GigaSwift Ethernet Adapter is its support for various networking protocols. It is designed to operate in diverse networking environments, supporting both full-duplex and half-duplex modes, which maximizes its efficiency in data transmission. This flexibility makes it an ideal choice for heterogeneous networks where different devices and standards coexist.

Furthermore, the adapter features advanced error detection and correction technologies, ensuring reliable transmission of data over the network. With features such as flow control and jumbo frame support, it enhances the efficiency and performance of large-scale data transfers.

The GigaSwift also comes equipped with diagnostic and management utilities, allowing network administrators to monitor the network performance effectively. This is crucial for identifying bottlenecks and optimizing network configurations to ensure peak operational efficiency.

Overall, the Sun Microsystems GigaSwift Ethernet Adapter is an essential tool for businesses looking to upgrade their networking infrastructure. Its combination of speed, versatility, and reliability allows enterprises to adopt next-generation networking solutions while maintaining compatibility with existing systems, ultimately contributing to a more robust and efficient IT environment.
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