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Cisco Bug: CSCun33874 - DNS SERVFAIL when A RR for name server is expired with resol exception

Last Modified

Jun 20, 2016

Products (1)

  • Cisco Network Registrar

Known Affected Releases

7.2(3.3)

Description (partial)

Symptom:
Queries for valid domains unexpectedly return SERVFAIL.

Conditions:
This only happens for domains with resolution exceptions when the cached NS record for the domain is valid and the cached A record for the name server is expired.
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