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Manual SCA-340 / SCA-340-L sysmik.de 33
4.3 Ethernet Switch for Flexible Network Topologies
The integrated Ethernet switch with four external and two internal ports, allows
Ethernet cabling without additional switches. It supports:

free assignment of IP interfaces to external Ethernet ports

ring monitoring with automatic port deactivation

Rapid Spanning Tree Protocol (RSTP) to manage redundant Ethernet
topologies

throtteling of Ethernet traffic to prevent multicast and broadcast storms
The Ethernet switch can be configured here:

SCA System Shell (see 4.1.1)

Commissioning Website (see 4.1.2)

WorkPlace via Fox connection with Niagara Station under
Config

Drivers

SysmikScaIoNetwork

LocalPlatform

EthSwitch
(SysmikScaSwitchCfgView)
When using ring monitoring or RSTP, the status of the respective ports (activated,
deactivated) is changed automatically. The port status information shows the state
of the redundant topology. The state of the external Ethernet ports is provided in the
Niagara Station, in the Sedona Application, and on the Commissioning Website.
Factory default:

RSTP deactivated

ring monitoring deactivated

Broadcast/Multicast throtteling: 1Mbps

eth1on ports LAN1, LAN2

eth0 on ports LAN3, LAN4
4.3.1 Assignment of IP Interfaces to External Ethernet Ports
The Ethernet Switch connects the two internal IP interfaces eth0 and eth1 with the
external Ethernet ports. Fig. 4.3.1.1 to Fig. 4.3.1.4 show the possible combinations.
LAN1
eth0
LAN2
LAN3
LAN4
Fig. 4.3.1.1: LAN1-4 on eth0 , eth1 deactivated
LAN1 eth1
LAN2
eth0 LAN3
LAN4
Fig. 4.3.1.2: LAN2/3/4 on
eth0
, LAN1 on
eth1