Cisco ROUTER-SDM-CD User Manual page 752

Dynamic DNS Methods
Server
Username
Password
IETF
Cisco Router and Security Device Manager 2.5 User's Guide
31-30
If using HTTP, choose the domain address of the DNS service provider from the
drop-down menu.
If using HTTP, enter a username for accessing the DNS service provider.
If using HTTP, enter a password for accessing the DNS service provider.
IETF is a dynamic DNS method type that updates a DNS server with changes to
the associated interface's IP address.
If using IETF, configure a DNS server for the router in Configure > Additional
Tasks > DNS.
Chapter 31 Router Properties
OL-4015-12