With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dnsServerType
dns Server Type
1.3.6.1.4.1.9.5.1.13.2.1.2
this object to primary(2) or other(3) for an IP address which is not already in the table. The primary entry will be used first, if it is reachable. Otherwise, one of the other entries will be used. Setting one entry to primary(2) causes any previous primary entry to change to other(3). To remove an entry from the table, set this object to invalid(1).
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor dnsServerType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.