V3.8
OnTime Industrial Ethernet
U/R/T200 series Installation Guide
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4.3 RSTP/STP
The R/T200 can also be enabled for the Rapid Spanning Tree Protocol (RSTP) with Spanning
Tree Protocol (STP) fallback, where fallback means that the switch will act as a STP enabled
switch if other switches in the network only support STP. This RTSP protocol is based on
IEEE802.1w and the STP protocol is based on IEEE802.1D. RTSP/STP is an alternative to
the FRNT.
Both RSTP and STP are open standards that can handle any network topology (i.e. all kinds
of network loops) and provide interoperability versus other Ethernet switches from other
vendors enabled for STP.
RSTP/STP is enabled by ticking the “Enable RSTP/STP” tick box, and the RSTP/STP focal
point of the network can be set by ticking the focal point option on one of the switches in the
network.
The network re-configuration time in case of RSTP is used is 2-5 seconds (depending on the
topology change), while the corresponding re-configuration time for STP is approx. 40
seconds.
The user can enable RTSP/STP on a per port basis. However, care must be shown if the
switch is used in a topology with network loops, and where some of the ports are disabled for
RSTP/STP.
Note: RTSP/STP and FRNT can not be combined.
4.4 SNMP
The R/T200 switch supports Simple Network Management Protocol (SNMP). To
enable/disable SNMP tick the SNMP box and press the ‘Set’ button. Press the ‘Reset’ button
to restart the Switch with SNMP enabled/disabled.
The R/T200 MIBs, MIB2-Interface, IF MIB and Brdige MIB can be inspected by the SNMP
manager (SNMP tool) running on e.g. a windows or unix platform (e.g. HP OpenView,
IntraVue, iSNMP). How the R/T200 MIB information is presented depends on the SNMP
manager GUI implementation.
The IP address of the SNMP Host (NMS - Network Monitoring Stations) must be defined
before SNMP traps can be generated by the R/T200 switch and sent to the NMS. This is
done by setting the address in the Westermo OnTime private MIB part eneral/trapHostAddr.
The SNMP TRAP is sending TCP/UDP packets on port 162.
After the host address is set the user can configure what type of TRAP he wants to configure.
The Westermo OnTime switch has today support for several traps, see below:
•
Link down/up trap
Link up/down trap - use the ifMib. ifMib/ifXEntry/ifLinkUpDownTrapEnable.
•
Status
trap
To monitoring the status of the switch - use private MIB,
