With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cudldpIfFastHelloOperStatus
cudldp If Fast Hello Operational Status
1.3.6.1.4.1.9.9.118.1.2.1.1.8
This object indicates the operational status of fast hello UDLD at this interface.
Back to CISCO-UDLDP-MIB MIB page.
IPHost Network monitor allows you to monitor cudldpIfFastHelloOperStatus 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.