Cisco Bug: CSCup97186 - Caching DNS returns SERVFAIL when RR type switches to or from CNAME
Apr 17, 2015
- Cisco Network Registrar
Known Affected Releases
7.0 7.1 7.2(3.4)
Symptom: The DNS server may in periods return SERVFAIL instead of valid data for a query. Conditions: A DNS response contains a CNAME chain where a resource record changes between CNAME and A (or AAAA) types.
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Bug Details Include
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