Industrial Ethernet Solutions for
Control and Automation
e-mail: info@moxanet.com www.moxa.com
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EDS-508 Series Managed Redundant Switch
Couple several Turbo Rings for distributed applications
For some systems, it may not be convenient to connect all
devices in the system to create one BIG redundant ring, since
some devices could be located at a remote site. Turbo Ring’s
“Ring Coupling” function helps you separate those distributed
devices into different smaller redundant rings, but in such a
way that they can still communicate with each other.
IGMP Snooping for filtering multicast traffic
IGMP (Internet Group Management Protocol) is important in
industrial networking, and may be used over Ethernet with
some field bus protocols, such as Allen-Bradley EtherNet/IP,
Siemens Profibus, and Foundation Fieldbus HSE (High Speed
Ethernet). These industrial Ethernet protocols use publisher/
subscriber communications models to multicast packets that
could flood a network with heavy traffic. IGMP Snooping provides
the ability to prune multicast traffic so that it travels only to those
end destinations that require this kind of traffic, and consequently
reduces the amount of traffic on the Ethernet LAN.
VLAN eases network planning
A VLAN is a group of devices that can be located anywhere
on a network, but which communicate as if they are on the
same physical segment. VLANs can be used to segment your
network without being restricted by physical connections—a
limitation imposed by traditional network design. Besides, since
all automation systems incorporate sensitive devices that must
be protected from unauthorized access, it is very important
to have some type of authentication system set up that only
allows authorized users to access the system. If devices belong
to different VLANs, they cannot communicate with each other,
providing extra security and protection from unwanted invasion
or traffic. The IEEE 802.1Q standard and GVRP protocol can
exchange the same interoperable parameters to keep consistent
VLAN settings over the entire network.
(16 strony)
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