8.6
Performance measurements
GUID-E9DD125E-7EDF-4964-A4B5-3075DD1826F8 v1
The test setup consisted of IEDs and a switch in a ring, and UDP multicast frames were sent at 5 ms
interval to measure the single link failure recovery time.
lists the results of the measurements.
Table 6:
Performance measurements
Protocol
Topology
Recovery time from single link failure
9 IEDs + 1 Switch
39 IEDs + 1 switch
RSTP (802.1D – 2004)
Ring
< 45 ms
< 185 ms
The recovery time of a link failure on RSTP with the IEDs that are using Galvanic
ports is higher than the IEDs with the Optical ports.
8.7
Reset to factory defaults
GUID-13F6F3BF-1621-41E0-A422-C2B6BA3F5A1E v1
If a reset to factory default is performed on an IED with RSTP, then the IED will be reverted to the
factory settings with default values and RSTP will be disabled.
GUID-D4AFB582-036A-4A98-88A5-40884091AFD7 v1
Table 7:
RSTP technical data
Function
Value
Protocol
IEEE 802.1D Rapid spanning tree protocol (RSTP)
Communication speed
100Base-FX
Connectors
Optical, type LC or Galvanic, type RJ45
Supported topologies
Star, Ring, Ring and star
Maximum number of
nodes in a ring
39 IEDs
Performance
measurements
Recovery time from single link failure for 9 IEDs + 1 switch is < 45 ms and for 39 IEDs + 1
switch is < 185 ms in ring topology
1MRK 511 441-UEN Rev. C
Section 8
Rapid spanning tree protocol (RSTP)
Switchgear control unit SAM600-IO
41
Communication protocol manual
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