With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
agentDhcpScopeDnsServerAddress3
agent Dhcp Scope Dns Server Address 3
1.3.6.1.4.1.14179.1.2.15.1.1.14
IP Address of the DHCP Scope's DNS Server 3.
Back to AIRESPACE-SWITCHING-MIB MIB page.
IPHost Network monitor allows you to monitor agentDhcpScopeDnsServerAddress3 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.