I have noticed today that our 7210 controller doesn't detect wificalling connections properly. show ucc dns-ip-learning shows "Unknown" for service provider.
#show ucc dns-ip-learning
DNS IP Learning:
----------------
IP Address Service Provider
---------- ----------------
139.7.117.161 Unknown
139.7.117.162 Unknown
89.15.232.32 Unknown
89.204.152.48 Unknown
89.204.136.64 Unknown
109.237.187.129 Unknown
109.237.187.130 Unknown
109.237.187.225 Unknown
109.237.187.226 Unknown
However, I think I have configured the correct dns-patterns to detect the german mobile providers:
#show voice wificalling
WiFi Calling Configuration
--------------------------
Parameter Value
--------- -----
WiFi Calling Support Enabled
dns pattern/service provider epdg.epc.drz1.vodafone-ip.de/Vodafone
dns pattern/service provider vodafone-ip.de/Vodafone DE
dns pattern/service provider epdg.epc.mnc001.mcc262.pub.3gppnetwork.org/Telekom DE
dns pattern/service provider epdg.epc.mnc002.mcc262.pub.3gppnetwork.org/Vodafone DE
I have ran a tcpdump on our dns servers to verify that the vodafone mobile client indeed checks for epdg.epc.mnc002.mcc262.pub.3gppnetwork.org which is an alias for epdg.epc.drz1.vodafone-ip.de and which resolves to 139.7.117.161 and 139.7.117.162.
Clients can use wificalling but I cannot see any client-info or any call-info or the correct flags in the datapath during a wificall.
What do I have to configure to get this work properly?
Thanks.