With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtBidirDFTable
cpim Ext Bidir DF Table
1.3.6.1.4.1.9.10.120.1.1.6
The (conceptual) table listing the Per-RP DF (Designated Forwarder) Election state for each interface for all the RPs in Bidir mode.
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtBidirDFTable 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.