top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

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

+3 votes
1,086 views

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

posted Jul 10, 2016 by Neeraj Mishra

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

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!
commented Jul 12, 2016 by Sivakumar.d
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.
commented Jul 12, 2016 by Harshita
Similar Questions
0 votes
LTE: Why does SGW include S5/S8 interface PGW-C F-TEID in Create Session Response message to MME ?

As per LTE core network architecture, MME shares S11 interface with SGW and SGW has S5/S8 interface with PGW.
I went through Create Session Response message sent by SGW to MME and found PGW-C and PGW-U tunnel ids.
I want to know what MME does with these PGW-C and PGW-U tunnel Ids ?

0 votes
LTE, eGTP : Does the IP-sec sufficient to secure eGTP packets ?

There is no security at eGTP level . Does the IP-sec sufficient to achieve the security for eGTP messages ?

...