Overlapped VLANs to the rescue


Overlapped VLANs in Contemporary Controls’ EISX_M, EICP_M, and EISB_M switches will allow one device to be shared among multiple VLANs—simultaneously isolating traffic between the VLANs. Normally, a router is needed when communicating between VLANs; however, overlapped VLANs allow a specific device to be shared in multiple VLANs without the need of a router.

Contemporary Controls’ R&D manager, Bennet Levine, says overlapped VLANs are very useful for the company’s customers who are interconnecting office and factory networks. “In the long run, overlapped VLANs save customers much aggravation. Why? Overlapped VLANs can be employed to keep problems that often occur in the office environment from affecting the factory,” explains Levine. He added that these office problems may not even be noticed immediately. “For example, if you are sitting at your desk and it takes one or two seconds longer to bring up a Web page from the Internet

VLAN is a feature that allows the switch to isolate traffic between groups of ports so the user can control which devices communicate with each other. VLANs enhance network performance because traffic originating in a VLAN will go nowhere else.

To see a tutorial, click here .

— Richard Phelps, senior editor, Control Engineering

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Big Data and IIoT value; Monitoring Big Data; Robotics safety standards and programming; Learning about PID
Motor specification guidelines; Understanding multivariable control; Improving a safety instrumented system; 2017 Engineers' Choice Award Winners
Selecting the best controller from several viewpoints; System integrator advice for the IIoT; TSN and real-time Ethernet; Questions to ask when selecting a VFD; Action items for an aging PLC/DCS
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Motion control advances and solutions can help with machine control, automated control on assembly lines, integration of robotics and automation, and machine safety.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
click me