Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

1841 router + ip ddns not available status

I have an 1841 router with software version 12.4.(19a). each time I try to configure DDNS on the router i get the message

option 1 under the fa0/0 WAN interface

testbed01#sh ip ddns up

Dynamic DNS Update on FastEthernet0/0:

  Update Method Name            Update Destination                                  not available

option 2: under the dialer 0 interface

Dynamic DNS Update on Dialer0:

  Update Method Name            Update Destination

  hostanme                      host:                          not available

both times I see the service as 'not available' and when I run the 'debug ip ddns update' I see no output from the debug nor do I see anything in the show logs. Why would this not even produce an output? or work for that? did I miss something in the configuration or is there something on the ISP side that I've missed.

configuration from the router:

testbed01#sh run | b ip ddns

ip ddns update method



interval maximum 0 0 5 0

interface FastEthernet0/0

description WAN INTERface

ip ddns update hostname vpn-dimitrib

ip ddns update

ip address dhcp

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

crypto map clientmap


Interface dialer 0

ip ddns update hostname vpn-dimitrib

ip ddns update

ip route dhcp


testbed01#sh debug

Domain Name System debugging is on

Dynamic DNS debugging is on


  DHCP client activity debugging is on

  • WAN Routing and Switching
This widget could not be displayed.