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Building Technologies
Function indicator Meaning RM LED flashing pattern (every 2 s)
Manager Ring open There is a break in the
Ethernet ring at one or
more locations
Claim Manager Ring open
Double manager Two Ethernet
switches have been
configured as the
manager
Client Ethernet switch has
been configured as a
client
Unidirectional Data Link
Fault
In one section of the
MRP ring, the
connection is only
running in one
direction due to
incorrect cabling or a
hardware fault
Table 4: RM LED flashing pattern
1
MRP: Media redundancy protocol
Function indicator Possible troubleshooting steps
Claim Manager ● Adapt configuration. A ring manager has to be configured within each MRP ring.
Ring open ● Check the MRP ring. There is a break in the ring at one or more of the panels.
● Check whether cable is defective.
● Ring port LEDs which are switched off show open ports
– Defective/unplugged cable.
Double manager ● Adapt configuration. Only one Ethernet switch is allowed to be configured as the
ring manager.
Unidirectional Data Link
Fault
● Check the cabling of all optical fiber sections
● Replace each Ethernet switch in turn until you identify the defective device.
Table 5: Troubleshooting
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