SIEMENS
2/363
Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Industrial Ethernet Layer 3 Switches / Routers
SCALANCE X-400 managed
2
■
Function
•
Increasing the network performance;
by filtering the data traffic on the basis of the Ethernet (MAC)
address of the data terminals, the local data traffic remains
local; only data intended for users of another subnetwork are
forwarded by the switch.
•
Simple network configuration and network expansion;
the switch saves the data received at the ports and forwards
it automatically to the destination address. The limitation of the
network expansion by collision detection (CSMA/CD
procedure) terminates at the port.
•
Limitation of the error propagation to the affected subnetwork;
the SCALANCE X-400 switches only forward data with a valid
checksum (CRC).
•
Integration of existing subnetworks with 10 Mbit/s into Fast
Ethernet networks with 100 Mbit/s;
at the twisted-pair ports, the SCALANCE X-400 switch
automatically recognizes the conductor pairs for transmission
and reception (autocrossover), the data transfer rate of 10 or
100 Mbit/s, as well as full-duplex and half-duplex operation
(autonegotiation).
•
High-performance connection of SCALANCE X-400 switches
with 1 Gbit/s;
SCALANCE X-400 switches have two (X414-3E) or four
(X408-2) Gigabit Ethernet ports for connecting the switches to
each other.
•
Integrated redundancy manager for constructing Fast
Ethernet and Gigabit Ethernet ring topologies with high-speed
media redundancy.
•
High-speed standby redundancy;
several network segments such as rings can be inter-
connected redundantly with SCALANCE X-400 by means of
the integrated standby function. Two X-400 switches are
configured in a ring as a master and slave and are
connected via two links to the other ring. In the case of
SCALANCE X408-2 or SCALANCE X-300, a high-performance
redundant coupling at 1 000 Mbit/s is possible.
•
Redundant interfacing to company networks;
SCALANCE X-400 switches support the standardized
redundancy procedures Spanning Tree Protocol (STP) and
Rapid Spanning Tree Protocol (RSTP). This enables a
subnetwork to be connected redundantly to a higher level
corporate network with reduced requirements for the recon-
figuration time (in the order of seconds).
•
Support of virtual networks (VLAN)
for structuring Industrial Ethernet networks with a fast growing
number of users, a physically existing network can be divided
into several virtual networks.
•
Integrated hardware Layer 3 Switching function
(IP routing, only SCALANCE X414-3E);
IP subnetworks can be created and interconnected, e.g.
automation network with office network, enabling a structuring
of the networks.
•
Load limiting with use of Multicast protocols
(e.g. video transmission);
through learning the Multicast sources and targets (IGMP
snooping), SCALANCE X-400 switches can also filter
Multicast data traffic and therefore limit the load in the network.
•
Time synchronization
Diagnostic messages (log table entries, e-mails) are time-
stamped. The local time is standardized throughout the
network by means of synchronization with a SICLOCK or
SNTP time transmitter, thereby simplifying the assignment of
diagnostic messages to several devices.
•
Fast replacement of devices in event of failure, by means of
the C-PLUG switching medium
© Siemens AG 2014