With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cIsnsDdIscsiMemberTable
Cisco iSNS Dd Iscsi Member Table
1.3.6.1.4.1.9.10.116.1.1.6.2
A table containing iSCSI node indexes that have been assigned to specific DDs in this iSNS Server instance. The number of rows in the table is dependent on the number of relationships between iSCSI Nodes and DDs registered in the iSNS instance.
Back to CISCO-IETF-ISNS-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cIsnsDdIscsiMemberTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.