With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbdMemberSplitHorizon
CISCO BRIDGE DOMAIN Member Split Horizon
1.3.6.1.4.1.9.9.642.1.2.1.1.5
This object indicates whether split horizon is configured on this bridge domain member.
Back to CISCO-BRIDGE-DOMAIN-MIB MIB page.
IPHost Network monitor allows you to monitor cbdMemberSplitHorizon on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.