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Cisco Bug: CSCvt00228 - DDNS triggers a crash when an update is sent to delete an entry

Last Modified

Aug 29, 2020

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

A crash is triggered by the Dynamic Domain Name Server (DDNS or DynDNS) feature.

The crash report points to a memory segmentation fault by the process:

UNIX-EXT-SIGNAL: Segmentation fault(11), Process = Dyn DNS Client

DynDNS has to be configured, any of these examples is applicable:

ip ddns update method testing
interface EthernetX
 ip dhcp client update dns
 ip ddns update testing
 ip address dhcp
ip dhcp pool test
 network IP MASK
 update dns

Further information on how is DDNS configured on Cisco devices:
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