With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
appnNnTopoNodePurges
appn Network Node Topology Node Purges
1.3.6.1.2.1.34.4.1.2.1.3
Total number of topology node records purged from this node's topology database since the node was last reinitialized.
Back to APPN-MIB MIB page.
IPHost Network monitor allows you to monitor appnNnTopoNodePurges 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.