User manual

FL SWITCH SMCS 8GT
7470_en_00 PHOENIX CONTACT 9
Diagnostics via the Alarm Contact
If either or both of the supply voltages fails, the alarm contact opens. On a restart, the switch executes a hardware selftest.
In the event of an error during the selftest, an SNMP trap is transmitted.
Status and Diagnostic Indicators
These indicators provide information about the status of the SMCS at all times. Local diagnostics without additional tools
is possible thanks to numerous LEDs.
Auto Crossing
Due to auto crossing of the transmit and receive cables of a twisted pair interface, it is no longer necessary to distinguish
between 1:1 and crossover Ethernet cables.
Auto Negotiation
Auto negotiation is a method whereby the switch automatically detects the operating parameters for the connected network
and sets the corresponding parameters (10 Mbps/100 Mbps/1000 Mbps data transmission rate and half/full duplex trans-
mission mode) for its RJ45 ports. Automatic port setting eliminates the need for manual intervention by the user. The auto
negotiation function can be activated/deactivated via the web interface.
Software Functions
SNMP
SNMP (Simple Network Management Protocol) can be used to monitor Ethernet communication even via network manage-
ment systems. Management systems, such as a PC with Factory Manager, can read and modify configuration and diag-
nostic data from network devices via SNMP. Supported MIBs: Management
Information Base II (MIB 2) according to RFC1213, LLDP MIB, RSTP MIB, RMON MIB (only group statistics), bridge MIB
(groups: dot1dStp, dot1dBase, dot1dTpAgingTime, and private MIBs).
IEEE 802.1w - Rapid Reconfiguration Spanning Tree Protocol (RSTP)
Rapid Spanning Tree is a procedure enabling the use of redundant Ethernet structures. Via RSTP, the meshed topologies
of redundant structures are suppressed logically and converted acyclically to tree structures. In meshed networks, two
nodes may be connected in two or more ways (loop). Due to these loops, data packets would circle endlessly in the network.
This is why these loops are replaced by a logical deterministic path using an RSTP algorithm. The loops are eliminated by
temporarily switching off the individual switch ports in a specific way. All active ports as well as deactivated ports receive
data packets. However, the data packets are only forwarded by active ports. The deactivated ports operating in hot standby
mode are reintegrated into the network, if required, by modifying the network topology.
Web-Based Management
In addition to management via SNMP, the switch also supports integrated web-based management. This provides detailed
diagnostic and configuration options for startup, operation, and in the event of an error, as well as comprehensive network
and device information.