Cisco Bug: CSCuq21634 - Phone always restart in ipv4 mode if get DNS AAAA response.
Feb 06, 2017
- Cisco Unified IP Phones 9900 Series
Known Affected Releases
Symptom: Phone always restart in ipv4 mode if get DNS AAAA response. Conditions: CUCM configured with only IPv4 host name, DNS server configured with IPv4 and IPv6 IP address, conditional restart can not work under this condition, such as phone will restart after subscribe phone service(example: Calendar).
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Bug Details Include
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