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Cisco Bug: CSCuq21634 - Phone always restart in ipv4 mode if get DNS AAAA response.

Last Modified

Feb 06, 2017

Products (1)

  • Cisco Unified IP Phones 9900 Series

Known Affected Releases

9.4(2)MN303

Description (partial)

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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