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ddns with on a 881W

Hi keith

I will use the cisco community to answer your question.  

dynamic dns are now going to charge for the dynamic dns resolution.  So an alternative is to grab one free Dynamic DNS host account at


Here is the cli that has to be incorporated into the startup script and then tftp'd to the ISR881W router (reason, cannot paste some of the characters).


The debug on my router, as shown below,  indicates that the update may have worked. My free account at  however does not indicate that a update occured.  This may not be an error.

regards Dave


ip ddns update method no-ip
 interval maximum 2 0 0 0
 interval minimum 1 0 0 0

ip dhcp-client update dns

interface FastEthernet4

 description $WAN$
 ip ddns update hostname
 ip ddns update no-ip

 ip address dhcp
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto

Then I shut down the wan interface  and did a no shut on the wan interface .  DDNS updated so the debug and interaction with showed.



Raleigh(config)#int fast 4
Raleigh(config-if)#no shut
May  1 01:31:33 EDT: DYNUPD: SWIF comingup 'FastEthernet4'
May  1 01:31:33 EDT: DYNUPD: SWIF comingup 'FastEthernet4'
May  1 01:31:35.482 EDT: %LINK-3-UPDOWN: Interface FastEthernet4, changed stateto up
May  1 01:31:36.482 EDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet4, changed state to up

May  1 01:31:42.578 EDT: %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet4 assigned DHCP address, mask, hostname


May  1 01:31:43 EDT: DYNDNSUPD: Adding DNS mapping for <=>
May  1 01:31:43 EDT: HTTPDNS: Update add called for <=>
May  1 01:31:43 EDT: HTTPDNSUPD: Session ID = 0x9
May  1 01:31:43 EDT: HTTPDNSUPD: URL = ''

May  1 01:31:43 EDT: HTTPDNSUPD: Sending request
May  1 01:31:44 EDT: HTTPDNSUPD: Response for update <=>

May  1 01:31:44 EDT: HTTPDNSUPD: DATA STARTnochg
May  1 01:31:44 EDT: HTTPDNSUPD: DATA END, Status is Response data recieved, successfully
May  1 01:31:44 EDT: HTTPDNSUPD: Call returned SUCCESS, update of <=> succeeded

May  1 01:31:44 EDT: DYNDNSUPD: Another update completed (outstanding=0, total=0)
May  1 01:31:44 EDT: HTTPDNSUPD: Clearing all session 9 info