Question:
What is an Integrity Ping in Hot-Standby settings? Is it really necessary?
Solution:
Setting up the Integrity Ping is essential for the Hot-Standby mode to work correctly!
The Hot-Standby algorithm requires a third party on the network (the first two being the main and the backup servers) to determine whether this network is working. If neither the integrity address nor the backup server can be accessed, the main server assumes the network interface has issues, and then immediately stops running the Domain.
The ping address must be from a device that theoretically will never be turned off, or that is crucial for the system to work properly (e.g.: PLC, switch, gateway, etc.); thus, if this point presents any problem, the whole system will be shut down.
Note: You must NEVER use the main server’s or the secondary server’s IP address!
New integrity check option (v6.9 and later)
From Elipse E3/Power/Water version 6.9, HotStandby supports a new integrity check method: E3 Server (REC Echo).
This option uses the proprietary REC protocol instead of ICMP and requires an E3Server running on the integrity address (Demo mode allowed, no application required).
By default, port 6515 is used. If a different port is configured, the same setting must be applied to all HotStandby nodes, and all system connections (Viewers, Remote Domains, etc.) will use this port.
The integrity check type can be selected via a combobox.
