GEK-113000AE F650 Digital Bay Controller B-13
APPENDIX B B.3 LINK LOSS ALERT (LLA)
B
B.3.3 LLA TIMEOUT
This setting will be active only when the LLA PRIORITY is set to ENABLED. When the link on primary port is detected
again after it fails, there is LLA TIMEOUT (ms) monitoring time for the health of the network. During this time, the secondary
port remains active. If primary network is healthy for more than LLA TOIMEOUT value, the switch over to primary port is
automatic.
If the setting LLA PRIORITY is enabled:
• The primary port is port A while secondary (redundant) port is port B.
• The primary port will always be used if available.
• If the link on primary port is lost switch over to secondary port occurs immediately.
• When the link on primary port is detected again, there is a monitoring timeout (LLA TIMEOUT) for the health of the
network. After that period the communication switch over to primary port automatically.
If the setting LLA PRIORITY is disabled:
• There is no priority, therefore there is no primary port. The communication switch over from one Port to the other
occurs when the link fails.
• In this case the LLA TIMEOUT setting does not act.
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