Configure Static DNS Entries on Cisco IOS

You can configure Cisco’s IOS to remember IP addresses for host, without having to resort to a DNS lookup. Very much indeed like adding an entry to your /etc/hosts file.

Router(config)# ip host example.invalid 192.168.1.1
Router(config)# end
Router# sh host
Default Domain is example.invalid
Name/address lookup uses domain service
Name servers are 255.255.255.255

Codes: UN - unknown, EX - expired, OK - OK, ?? - revalidate
       temp - temporary, perm - permanent
       NA - Not Applicable None - Not defined

Host             Port  Flags       Age  Type  Address(es)
example.invalid  None  (perm, OK)  0    IP    192.168.1.1