Question : cisco ddns

this is what I've collected so far mostly using http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html#wp1203122, but am not sure how this last bit works: myip=<a>&host_id=<h> - do I need to replace those or will it use the router's hostname and interfase IP?

int dialer 1
ip dhcp client update dns server both
ip address dhcp

ip ddns update method myupdate
interval maximum 0 0 5 0
ddns
internal
http
add http://USERNAME:PASSWORD@members.easydns.com/dyn/ez-ipupdate.php?action=edit&myip=<a>&host_id=<h>
remove http://USERNAME:PASSWORD@members.easydns.com/dyn/ez-ipupdate.php?action=edit&myip=<a>&host_id=<h>

int dialer 1
ip ddns update hostname abc.dyndns.org
ip ddns update myupdate

Answer : cisco ddns

no, you dont have to replaced them. These values are estimated automatically:

conf t
ip ddns update method METHOD
 HTTP
  add https://your_username:yourpass@members.dyndns.org/nic/update?system=dyndns&hostname=<h>&myip=<a>
 interval maximum 5 0 0 0
 interval minimum 0 0 15 0
!
int dial 1
 ip ddns update hostname your_hostname
 ip ddns update METHOD host your_hostname


If you copy paste the above commands , cisco CLI can get special characters (for example "?")
Try to upload the config using tftp.