SilentKnight VisorAlarm ARLY Interface - Manual (Page 19)

VISOR ALARM – ARLY Configuration
II - 14
Doc.DM359-I
Rev.2.0
ARLY-1 Cfg>BACKUP-ALARM-RECEIVER RETRY-TIME value
value Time in seconds between retries. Admits values between 3 and 10.
Example:
ARLY-1 Cfg>BACKUP-ALARM-RECEIVER RETRY-TIME 5
ARLY-1 Cfg>
i) BACKUP-ALARM-RECEIVER POLLING-SYNC-TIME
This value is the time between configuration synchronizations.
Syntax:
ARLY-1 Cfg>BACKUP-ALARM-RECEIVER POLLING-SYNC-TIME value
value Time in seconds between configuration synchronizations. Admits
values between 1 and 65535.
Example:
ARLY-1 Cfg>BACKUP-ALARM-RECEIVER POLLING-SYNC-TIME 5
ARLY-1 Cfg>
The right election of the previous values is fundamental for the correct operation of the
backup process. Specifically, these parameters affect the detection of service
interruption for both the main and the backup receivers.
However, a receiver could decide that its complementary receiver (main or backup) has
a failure as the polling between them has been interrupted, however that polling could
have failed because the receiver itself doesn’t have the Ethernet up or because it
doesn’t have Internet access.
So, it is very important that detection of poll failure is slower than detection of failure
in the Ethernet interface or the Internet.
As guide to choose an adequate set of parameters it is strongly recommended that the
values meet the following conditions:
Main VisorALARM receiver:
2 x POLL-TIME > 15 1
2 x POLL-TIME > 3 x MONITOR-IP-ADDRESS-RATE 2
Backup VisorALARM receiver:
POLL-FAILURE-TIME + RETRIES-NUMBER * RETRY-TIME > 15 1
POLL-FAILURE-TIME + RETRIES-NUMBER * RETRY-TIME > 3 x MONITOR-IP-ADDRESS-RATE 2
NOTES:
1 The value 15 is the time in seconds that the equipment takes in detecting a failure in
the Ethernet interface.
2 MONITOR-IP-ADDRESS-RATE is the poll time of an external server in the Internet.
It must be configured according with the MONITOR-IP-ADDR paragraph.