Manuals / Asante Technologies / Computer Equipment / Switch

Asante Technologies 65120 user manual Flow Control, Auto-Negotiation

Models: 65120

1 47
Download 47 pages 43.31 Kb
Page 39
Image 39

6.2.2 Flow Control

With a link operating at a high data rate, a switch may experience occasional limitations in the buffer space used to store Ethernet frames before forwarding them. In this situation, if the sending station continues to send frames, the switch will have no option but to discard the frames. This may quickly lead to unacceptable delays in upper-level protocols.

In order to avoid unnecessarily dropping frames, a switch may implement Flow Control. Flow control is a feature that allows the switch to recognize when the buffer space is limited, and to send an Ethernet PAUSE frame to its link partner to cease transmission for a specified period. As with a full duplex link, both ends of the link must understand flow control for the mechanism to operate properly.

6.2.3 Auto-Negotiation

As discussed above, you need to make sure that both ends of a link agree about the duplex and flow control settings to be used (as well as the speed of the connection). In even a mid-sized network, making sure that all the links agree on all these parameters would be too big a job if the network manager had to configure every connection manually.

To make configuration as automatic as possible, the IEEE has defined standards so that most connections can be automatically configured by the hardware, without manual intervention. Devices can agree on the speed, duplex mode and flow control settings for each individual connection. The possible links states are ranked:

1000Mbps/Full Duplex 1000Mbps/Half Duplex (never used) 100Mbps/Full Duplex 100Mbps/Half Duplex 10Mbps/Full Duplex 10Mbps/Half Duplex

With auto-negotiation, the link partners will configure the link to operate at the highest speed and duplex state that both support.

Auto-negotiation is supported on IntraCore switches on all UTP ports. GBIC ports operate at 1Gbps only, and only in full duplex mode, so auto-negotiation is disabled for GBIC ports.

Note: If an Ethernet device that is capable of auto-negotiation is connected to a port that has auto- negotiation turned off, the auto-negotiating device will default to half duplex mode. If the port that is not using auto-negotiation is set to full duplex, the link will have a duplex mismatch, and will so slow that it may be unusable. If you configure an Ethernet port to operate in full duplex mode, you must also configure the link partner to operate in full duplex. It is almost always better to let auto-negotiation take care of this for you.

39

Page 38 Page 40
Page 39
Image 39
Asante Technologies 65120 user manual Flow Control, Auto-Negotiation
Page 38 Page 40

65120 specifications

Asante Technologies 65120 is a high-performance network switch specifically designed to meet the needs of modern business environments. It stands out for its advanced features that ensure efficient data management and robust network performance. One of the key characteristics of the 65120 is its ability to support Gigabit Ethernet, which allows for rapid data transfer rates, crucial for businesses that rely on high-speed internet for their operations.

Equipped with 24 ports, the 65120 provides ample connectivity options, allowing businesses to connect multiple devices, including computers, printers, and servers. This extensive port availability ensures that companies can expand their network effortlessly as they grow, without having to invest in additional switches. The switch also features a compact design, making it easy to install in various environments, whether in a server room or an office space.

The 65120 employs advanced technologies that enhance its operational efficiency. One notable feature is its support for VLAN (Virtual Local Area Network) capabilities. VLANs allow network administrators to segment the network into smaller, manageable pieces, improving performance and security by isolating sensitive data traffic from regular network communication. This is particularly beneficial for organizations that handle sensitive customer information or require separate environments for different departments.

Additionally, the switch supports quality of service (QoS) features, which prioritize network traffic to ensure that critical applications receive the bandwidth necessary for smooth operation. This capability is essential for businesses that utilize voice-over IP (VoIP) or video conferencing technologies, where latency can significantly affect communication quality.

Power over Ethernet (PoE) is another significant advantage of the Asante Technologies 65120. This feature allows devices such as IP cameras, wireless access points, and VoIP phones to receive power through the network cable, eliminating the need for additional power sources and simplifying installation processes.

Overall, the Asante Technologies 65120 is a versatile and robust network switch designed for the evolving demands of modern businesses. Its combination of extensive port availability, advanced networking technologies such as VLAN support and QoS, and the convenience of PoE makes it an ideal choice for organizations seeking to enhance their network infrastructure while ensuring scalability and improved performance. This switch not only simplifies network management but also empowers businesses to stay competitive in an increasingly digital landscape.