VCS: NBU failover impeded by nagios monitoring - any experience?

OS: SUSE Linux; VCS: 5.1 NBU: 7.1 clustered Master Server in own SG

scenario: Nagios regularly starts diverse CLI commands on NBU to check for e.g. long-running jobs, nbemm still responding etc...

It seems that these checks stop VCS from doing a switch/failover of the NBU SG. "Workaround" is to disable the Master Server monitoring in Nagios; I am looking for a way disable these checks locally. Once I know how, I can have VCS do it. Any experience with this scenario?

Regards,

Bert