With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
voicePortOperDnsServerEntry
voice Port Operational Dns Server Entry
1.3.6.1.4.1.9.5.1.26.3.1
used for a particular voice port. If DHCP is enabled on a port, the DNS server IP address will come from the DHCP server. If DHCP is disabled, the DNS server IP address can be configured by users through the mib object voicePortIfDnsServerAddress for a port, otherwise it will be taken from DNS configuration in the system.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor voicePortOperDnsServerEntry 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.
