IO Server Processes Failing with Dual NIC

CitectSCADA 2018 R2 running on on a server with 2 NIC's (SCADA and Corporate). If the Corporate network is disabled all server processes work fine and start up. If the corporate network is enabled all the server process do not startup well, exceptions ,not responding . Anyone experienced anything like this?

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  • One thing I noticed that I haven't seen commented on yet. You state that the SCADA traffic comes through on a NIC with a 192.XXX.XXX.XXX IP address, and the Historian traffic comes through on a NIC with a 10.XXX.XXX.XXX IP address. Well, 192.XXX.XXX.XXX is a Class C private IP address with a default Subnet Mask of 255.255.255.0, and 10.XXX.XXX.XXX is a Class A private IP address with a default Subnet Mask of 255.0.0.0. They are on different subnets, which means they comprise two, separate networks. If there is any information that is being passed into either the Historian or SCADA side from the opposite network, they will not see each other and the traffic will drop into the great IP void. Are you able to reassign IP addresses to put both NICS on the same network? Even if it's not a permanent change, if it works you'll have identified the nature of the problem.