2–Planning Performance

Regardless of how many credits are borrowed, extending credits requires a minimum cable length that is dependent on transmission speed. Extending credits over short cables can result in excessive port resets. Table 2-2describes the distances that are possible for a port with 30 credits and the minimum cable lengths.

Table 2-2. Extended Credit Distances and Cable Lengths

Transmission Speed

Range for 30 Credits

Minimum Cable Length

 

 

 

1-Gbps

50 Km (30÷0.6)

3 Km

 

 

 

2-Gbps

25 Km (30÷1.2)

1.5 Km

 

 

 

4-Gbps

12 Km (30÷2.4)

750 m

 

 

 

8-Gbps

6 Km (30÷4.8)

370 m

 

 

 

10-Gbps

4 Km (30÷7.2)

250 m

 

 

 

Bandwidth

Bandwidth is a measure of the volume of data that can be transmitted at a given transmission rate. An SFP port can transmit or receive at nominal rates of 1-, 2-, 4-, or 8-Gbps depending on the device to which it is connected. This corresponds to full duplex bandwidth values of 212 MB, 424 MB, 850 MB, and 1700 MB respectively. X2 ports transmit at a nominal rate of 10-Gbps, which corresponds to a full-duplex bandwidth value of 2550 MB.

For optimal performance, devices connected to the same I/O blade should have the same transmission speed. Connecting devices of different transmission speeds on the same I/O blade can reduce the maximum bandwidth by as much as 10%.

Multiple source ports can transmit to the same destination port if the destination bandwidth is greater than or equal to the combined source bandwidth. For example, two 2-Gbps source ports can transmit to one 4-Gbps destination port. Similarly, one source port can feed multiple destination ports if the combined destination bandwidth is greater than or equal to the source bandwidth.

When additional bandwidth is needed between devices, increase the number of links between the connecting switches. The switch guarantees in-order-delivery with any number of links between chassis.

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59229-05 A

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Q-Logic 9100, 59229-05 A manual Bandwidth, Extended Credit Distances and Cable Lengths
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59229-05 A, 9100 specifications

The Q-Logic 9100,59229-05 A is a high-performance networking solution designed to empower data centers and enterprise environments with optimal connectivity and exceptional throughput. As an essential component in modern IT infrastructures, this product stands out due to its advanced feature set and robust technology.

One of the main features of the Q-Logic 9100,59229-05 A is its support for Fibre Channel technology, which is widely recognized for its reliability and speed in storage area networks (SANs). This networking solution facilitates seamless data transfer at high rates, significantly enhancing the performance of storage systems.

Another notable characteristic of the Q-Logic 9100,59229-05 A is its compatibility with various operating systems and virtualization platforms. This versatility allows organizations to integrate it easily into their existing infrastructure, ensuring a smooth transition and minimal downtime. The product also supports multiple protocols, enhancing its utility in diverse environments.

The Q-Logic 9100,59229-05 A employs cutting-edge technologies such as offload capabilities, which reduce CPU overhead, allowing servers to focus on critical applications. By offloading certain tasks from the server's main processor, this solution improves overall system performance and efficiency, aiding in quicker data processing and reduced latency.

Additionally, security features embedded within the Q-Logic 9100,59229-05 A help safeguard sensitive information as it traverses networks. It supports encryption and secure data transportation protocols, ensuring that corporate data remains protected against unauthorized access and breaches.

The adaptability of the Q-Logic 9100,59229-05 A is further exhibited through its support for multiple speeds, allowing organizations to choose the bandwidth that best fits their current needs while maintaining the potential for future upgrades as demands grow.

In conclusion, the Q-Logic 9100,59229-05 A not only excels in speed and performance but also offers a versatile and secure solution suitable for a wide range of data center applications. Its blend of advanced features, robust technology, and adaptability positions it as a valuable asset for organizations looking to enhance their network connectivity and storage capabilities in an increasingly data-driven world.
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