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New Member

Cisco 881w - DDNS Bug?

I have a Cisco 881w that I am trying to configure DDNS on.  I believe I have everything configured correctly and that somehow the IOS is sending incorrect parameters if my debug statement is showing the correct results.

ip ddns update method no-ip



interval maximum 0 0 5 0

interval minimum 0 0 5 0


The code above is not working.  When I do a 'debug ip ddns update', it shows the following.

000223: Aug 14 12:18:08.027 EDT: DYNDNSUPD: Adding DNS mapping for <=> XX.XX.83.166

000224: Aug 14 12:18:08.027 EDT: HTTPDNS: Update add called for <=> XX.XX.83.166

000225: Aug 14 12:18:08.027 EDT: HTTPDNSUPD: Session ID = 0x82

000226: Aug 14 12:18:08.027 EDT: HTTPDNSUPD: URL = ''

000227: Aug 14 12:18:08.027 EDT: HTTPDNSUPD: Sending request... status='Host name resolution failed', tid=0

The relevant portion is that in the add statement the address is ''. Note the period between 'dynupdate' and 'no-ip'.  Yet the debug is showing '', note the hyphen between 'dynupdate' and 'no-ip'.  Host name resolution would fail when looking for because its not the correct address.

IOS - c880data-universalk9-mz.152-2.T.bin

Everyone's tags (2)
Hall of Fame Super Gold

Re: Cisco 881w - DDNS Bug?

Check configured ip name server, or use Ip address instead of name.

New Member

Cisco 881w - DDNS Bug?

My name resolution works fine.

ip name-server

ip name-server


Translating ""...domain server ( [OK]

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:


Success rate is 100 percent (5/5), round-trip min/avg/max = 92/95/96 ms

I do not understand what you want me to try by ip?

Hall of Fame Super Gold

Cisco 881w - DDNS Bug?

Try configuriring with @ sign instead of quoting.