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LTE: Why does network send primary and secondary DNS servers IP addresses in attach accept message ?

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How does primary and secondary DNS server IP addresses make any significance for an UE ?

posted Jul 10, 2016 by Neeraj Mishra

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1 Answer

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One use case what I know is DNS address is used by ePDG to resolve PGW address when UE moves from LTE to wifi and data flow continuity is needed. In this case PGW gives the same IP address to ePDG for the UE was being used in PGW.

answer Jul 11, 2016 by Harshita
thanks for info,any spec for reference!
I was going through one weblink for LTE and Wifi handover. While reading the content, I came across to know that DNS server ip address is used to resolve PGW address which is required by ePDG to interact with relevant PGW to get UE's IP address.
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