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Cisco Bug: CSCte70977 - calls fail intermittently with DNS SRV lookup failure with CUBE-ENT

Last Modified

Feb 04, 2017

Products (1)

  • Cisco IOS

Known Affected Releases

2.5

Description (partial)

Symptom:
Calls fail intermittently when DNS SRV lookup has error.
Conditions:
There seems to be an issue with the host table getting corrupted when new DNS lookups are done after DNS Cache timer expires.

This can also be triggered by issuing the "clear ip host all *" command.

This causes all outbound (towards the SP Network) calls to fail on the ASR.

All outbound calls require a DNS SRV lookup to locate the correct SIP SBC to route calls to.
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