With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vrrpOperPreemptMode
vrrp Operational Preempt Mode
1.3.6.1.2.1.68.1.3.1.12
Controls whether a higher priority virtual router will preempt a lower priority master.
Back to VRRP-MIB MIB page.
IPHost Network monitor allows you to monitor vrrpOperPreemptMode on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.