CAVA servers connecting to Celerra on wrong interfaces

Celerra NS-G8 running 5.6.50-2

CAVA Servers are Windows Server 2003 running SAV For NAS 5.2

We have a number of CAVA servers, each with several NICs: One for backups, one for management, and one to interface with the Celerra.  Each of these interfaces have their own IP address on a different network.  We currently have the CAVA servers running OK and are being used successfully by the Celerra.  The issue I'm facing is that it appears that the CAVA servers often attempt to access the Celerra using these other interfaces, not just the one that's been configured for CAVA.

We can see these connection attempts in the Celerra Manager Notifications log: "Invalid access from client to CHECK$", "Client (123.45.67.89 *backup interface*) is not a VC/CEPP server".

Can this be addressed by modifying the routing tables on the CAVA servers to not route communication from the other interfaces to the Celerra?  I came accross an EMC Powerlink article saying that these extra interfaces should be disabled, but we can't do that in our environment.