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Enable
This is the checkbox to enable/disable MMI Redundancy. Enabling
means both auto config database synchronization and auto backplane
switching for all cards when they lose contact with MMI.
MMI Redundancy mode
Either of one:
Once
or
Reverting
.
Switch delay
This is the delay before a module switches backplane when MMI switch
has been triggered. It is not applied when Manual Switch is performed.
Switch back delay
This delay is until now only applied on Reverting mode, working right
now only for Alarms trigger.
Following are Manual operations parameters:
Force manual switch
This will perform an immediate MMI switch.
Following are Status parameters:
Last successful synchronization
This shows the time last a synchronization was confirmed.
Last local change
This shows the time last local change in configuration was introduced.
MMI Status
This displays whether the MMI module is currently active or spare.
Synchronization status
Shows the current status:
'Automatic MMI synchronization is active' - Currently no issues
'Unable to automatically synchronize MMI configuration'
–
Possible
issues with synchronization
12.5.2
MMI
S
WITCHING
C
RITERIA
There are three possible triggers that will perform an automatic MMI Switch:
•
Alarms
: There are two alarms which will trigger MMI switch. They can be checked in '
Triggers
' node under
'
Redundancy
' tree in the left panel of the GUI, in '
Card redundancy'
for 'switch' card
•
Hardware failure (raised when both dataport links are down)
•
No contact with FPGA
•
Slave modules lose contact with MMI (MMI dead, reboot, upgrading
): All slave modules monitor the
connection to the MMI module and can switch if this is lost. All have been configured to have this logout
trigger enabled with the same delay, so they will switch at the same time
•
Manual:
Twin MMI is forced to take over and all cards are switched to the other backplane/MMI.
12.5.3
C
ONFIGURATION
D
ATABASE
S
YNCHRONIZATION
Database synchronisation will be performed automatically in both directions, ie main MMI -> backup MMI and
backup MMI -> main MMI. Immediately after introducing a change in the configuration on either MMI, it will be
synced to the twin MMI.
