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Weidmuller SL-MOD-GW Manual de usuario Pagina 20

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A.20
WAUS Data Products Main Line Catalogue 2013
A
Active Components
Product Overview
As the most important device in connecting the network,
switches with management functions play a vital role
in managing the whole local area network. Managed
switches support SNMP (Simple Network Management
Protocol), which is composed by a series of simple network
communication specications and can handle almost all
the basic managing tasks. Managed switches based on
SNMP need little network resources but have some security
mechanisms.
Comprehensive management functions
Managing ways
The managing function can be achieved by the following
ways: via Mini-USB, via Web viewer and via management
software. Compared with unmanaged switches, managed
types have various extended functions, such as VLAN, Ring
redundancy, alarm and so on.
Port Trunking
Port trunking gathers several physical ports into one virtual
port by sharing the same VLAN ID. Port trunking can be
controlled by one switch and every trunking group can use
as many as four physical ports according to the model of
switch used. Port trunking relieves network bottlenecks and
improves fault tolerance.
Port mirroring
During error checking and network data ow analysis,
we often need to monitor some ports of the switch. Port
mirroring enables users to mirror all the data ow in one
port at another without affecting the original port. By
analysing the data at the mirrored port we can monitor ports
in real time during normal operation.
VLAN
Virtual Local Area Network (VLAN) shows exactly the
features of modern network: fast, exible, easy to manage
and extend. In industrial Ethernet systems, VLAN restricts
frames to the same VLAN domain thus reducing trafc and
improving network performance.
Quality of Service (QoS)
Weidmuller managed switches can prioritise network
trafc using 802.1p standard as well as IP TOS and DSCP.
If the terminal devices connected to the switch do not
support these standards, the QoS function provides another
alternative. QoS works for packets without a priority
domain.
VLAN1
VLAN2
Switch 1
Port Trunking
Switch 2
Network
Data test devices
Mirroring port
Mirrored
port
Managing
Data
Control
data
Sample
data
Low
priority
High
priority
Top
priority
Top priority
High priority
Low priority
Managed Industrial Ethernet Switches
Active Components | Managed Industrial Ethernet Switches
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