Chapter 4: Web-Based Management

DiffServ Code Point (DSCP) - is the traffic prioritization bits within an IP header that are encoded by certain applications and/or devices to indicate the level of service required by the packet across a network. DSCP are defined in RFC2597 for classifying traffic into different service classes. The Managed Switch extracts the codepoint value of the DS field from IPv4 packets and identifies the priority of the incoming IP packets based on the configured priority.

4 bit

4 bit

6 bit

2 bit

VER=0100

Header

Size

DiffServ

RES

Preamble

Destination

Address

Source

Address

VLAN

TAG

(Optional)

Ethernet

Type

(0800)

Data

FCS

6 bytes 6 bytes

4 bytes

2 bytes

2 bytes 46-1517 bytes 4 bytes

The DSCP is six bits wide, allowing coding for up to 64 different forwarding behaviors. The DSCP retains backward compatibility with the three precedence bits so that non- DSCP compliant, TOS-enabled devices, will not conflict with the DSCP mapping. Based on network policies, different kinds of traffic can be marked for different kinds of forwarding.

TOS/DSCP Configuration

The TOS/DSCP page provides fields for defining output queue to specific DSCP fields. When TCP/IP's TOS/DSCP mode is applied, the Managed Switch recognizes TCP/IP Differentiated Service Codepoint (DSCP) priority information from the DS-field defined in RFC2474.

Enable TOS/DSCP for traffic classification and then the DSCP to priority mapping column is configurable, as Figure 4-8 shows:

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

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Graco GE-DS-242-POE manual TOS/DSCP Configuration, DiffServ

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.