Dmi/Desktop Management Interface; Ieee802.1P Priority Tagging; Ieee802.1Q Vlans - D-Link DFE-550TX User Manual

D-Link DFE-550TX Ethernet Adapter
IP Multicasting can eliminate an organization's need to maintain parallel networks for voice, video and
data.

DMI/Desktop Management Interface

DMI is an Operating System/Network Operating System-independent management framework that allows
system vendors to support multiple market/customer segments with a single management strategy. DMI
lowers the Total Cost of Ownership (TCO) by providing a common framework for managing desktop
systems, mobile systems and servers.
DMI supports a management schema (Management Information Format [MIF]), allowing manageable
components to be described within various platforms in a standard descriptive language. MIFs are
extensible, allowing the DFE-550TX to export value-added management capabilities. These value-added
management features enable remote troubleshooting and higher quality management of computer
resources.

IEEE802.1p Priority Tagging

With the growing number of network applications, local area networks (LANs) must deliver data for a wide
variety applications. Email, file transfers, database queries, voice over IP (VoIP), video-conferencing and
multimedia must all be delivered to the end-user's. Some of the traffic, such as video-conferencing, is of a
higher priority, with a slight delay of packets resulting in noticeable degeneration of video and audio
quality, while other traffic, such as email will not be noticeably affected by tiny delays. The large number of
programs run over today's networks serves to impede the ability to deliver time-critical data. Even if
bandwidth is not usually a problem on your network, during peak hours bursts in network traffic can result
in the delay of time-critical traffic.
IEEE802.1p defines seven levels of prioritization for Ethernet packets. High priority packets will be sent
through a network using 801.2p-compliant switches first. Lower priority packets will be transferred
whenever bandwidth is available. When properly setup, this ensures that time-critical data arrives on time
and is not affected by other traffic.

IEEE802.1Q VLANs

The IEEE802.1Q VLAN can help improve network performance and security by segmenting the network
into VLANs. IEEE802.1Q VLANs can limit broadcast and node-to-node (unicast) traffic to a single VLAN.
This limits the effects of broadcast storms and provides additional security for your network.
To set up GVRP VLANs, which support dynamic registration, the adapter should be connected to a switch
with GVRP VLAN capability.
For VLANs to function, the computer in which this NIC is installed must be using Windows 95 or later as
its operating system.
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