With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdcDNSDomainNameIndex
Cisco DNS Client DNS Domain Name Index
1.3.6.1.4.1.9.9.436.1.1.6.1.1
An arbitrary integer value, greater than zero, which uniquely identifies a DNS Domain Name defined for the system.
Back to CISCO-DNS-CLIENT-MIB MIB page.
IPHost Network monitor allows you to monitor cdcDNSDomainNameIndex 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.