With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpimExtIfBSRBorder
cpim Ext If BSR Border
1.3.6.1.4.1.9.10.120.1.1.1.1.15
This object denotes whether this interface acts as the border for all BSR messages for all groups with any scope.
Back to CISCO-IETF-PIM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cpimExtIfBSRBorder on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.