Dynamic DNS Support for Cisco

Examples

The following example shows how to configure the update method, the maximum interval of the updates (globally), and configure the hostname on the interface:

ip ddns update method mytest
ddns
http

!Before entering the question mark (?) character in the add http CLI, press the control
(Ctrl) key and the v key together on your keyboard. This will allow you to enter the ?
without the software interpreting the ? as a help query.

add http://test:test@members.dyndns.org/nic/update?system=dyndns&hostname=&myip=
interval maximum 1 0 0 0
exit

interface ether1
ip ddns update hostname abc.dyndns.org
ip ddns update mytest

Link: http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html