Chapter 7: Switch Operation

Store-and-Forward

Store-and-Forward is one type of packet-forwarding techniques. A Store-and- Forward Ethernet Switching stores the incoming frame in an internal buffer, do the complete error checking before transmission. Therefore, no error packets occurrence, it is the best choice when a network needs efficiency and stability.

The Ethernet Switch scans the destination address from the packet-header, searches the routing table pro-vided for the incoming port and forwards the packet, only if required. The fast forwarding makes the switch attractive for connecting servers directly to the network, thereby increasing throughput and availability. However, the switch is most commonly used to segment existence hubs, which nearly always improves overall performance. An Ethernet Switching can be easily configured in any Ethernet network environment to significantly boost bandwidth using conventional cabling and adapters.

Due to the learning function of the Ethernet switching, the source address and corresponding port number of each incoming and outgoing packet are stored in a routing table. This information is subsequently used to filter packets whose destination address is on the same segment as the source address. This confines network traffic to its respective domain and reduce the overall load on the network.

The Switch performs "Store and forward" therefore, no error packets occur. More reliably, it reduces the re-transmission rate. No packet loss will occur.

Auto-Negotiation

The STP ports on the Switch have built-in "Auto-negotiation". This technology automatically sets the best possible bandwidth when a connection is established with another network device (usually at Power On or Reset). This is done by detect the modes and speeds at the second of both device is connected and capable of, both 10Base-T and 100Base-TX devices can connect with the port in either Half- or Full- Duplex mode.

If attached device is:

100Base-TX port will set to:

 

 

10Mbps, no auto-negotiation

10Mbps.

 

 

10Mbps, with auto-negotiation

10/20Mbps (10Base-T/Full-Duplex)

 

 

100Mbps, no auto-negotiation

100Mbps

 

 

100Mbps, with auto-negotiation

100/200Mbps (100Base-TX/Full-Duplex)

 

 

192

GE-DS-242-PoE Managed Ethernet Switch User Manual

Page 196
Image 196
Graco GE-DS-242-POE manual Store-and-Forward, Auto-Negotiation

GE-DS-242-POE specifications

The Graco GE-DS-242-POE is an advanced electric diaphragm pump designed to cater to a wide range of industrial applications. This model stands out for its reliability, efficiency, and innovative technology, making it an ideal choice for demanding environments such as automotive, food processing, and chemical handling.

One of the main features of the GE-DS-242-POE is its robust construction. Built from durable materials, it is designed to withstand harsh operating conditions, ensuring a long service life. The pump is powered by a reliable electric motor that guarantees consistent performance with minimal downtime. This electric design offers a significant advantage over air-operated pumps, as it eliminates the need for compressed air, reducing operational costs.

The GE-DS-242-POE utilizes a double-diaphragm design that allows for precise fluid transfer and improved efficiency. This technology enables the pump to handle a variety of fluids, including viscous materials, slurries, and abrasive substances, without compromising performance. The dual diaphragm feature also enhances the pump's ability to handle fluctuating pressures, making it suitable for diverse applications.

Another key characteristic of this model is its versatile port configuration. The pump is available with various inlet and outlet sizes, allowing for easy integration into existing systems. This adaptability also means that the GE-DS-242-POE can be used in both temporary and permanent installations, further extending its utility.

Ease of maintenance is a crucial aspect of the GE-DS-242-POE. The design incorporates accessible service points, which simplify routine inspections and repairs. This user-friendly approach reduces maintenance time and costs, ultimately boosting productivity.

Additionally, the GE-DS-242-POE is equipped with advanced safety features. These include pressure relief valves and electronic controls that help prevent overpressurization, ensuring safe operation under all conditions. The pump also meets various industry standards, reinforcing its reliability and suitability for compliance with safety regulations.

In conclusion, the Graco GE-DS-242-POE is a technologically advanced electric diaphragm pump that excels in performance, durability, and versatility. Its robust construction, efficient double-diaphragm technology, and user-friendly design make it an indispensable tool for businesses in various sectors, enhancing operational efficiency while ensuring safety and reliability in fluid handling processes.