Guest

Preview Tool

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

16.12.1d

Description (partial)

Symptom:
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

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

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

Further information on how is DDNS configured on Cisco devices:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dns/configuration/15-mt/dns-15-mt-book/dns-dyn-dns-supp-ios.html#GUID-89BCB212-EE5C-40D9-AEF5-B18DDB5D5758
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.