Cisco DNS configuration
From Ever changing code
Check current DNS servers
To list the current list of DNS servers used by the router issue show ip dns view command. Please see below that Domain name-servers: section has been populated automatically by ISP (BTBusiness ADSL). Public IP is static but dns servers have been requested by ppp ipcp dns request command within interface Dialer0 section. Also the router acts as DNS server having ip dns server statement within its config.
show ip dns view DNS View default parameters: Logging is off DNS Resolver settings: Domain lookup is enabled Default domain name: aaa.geteway Domain search list: Lookup timeout: 3 seconds Lookup retries: 2 Domain name-servers: 18.104.22.168 22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206 220.127.116.11 DNS Server settings: Forwarding of queries is enabled Forwarder timeout: 3 seconds Forwarder retries: 2 Forwarder addresses: