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why SGI interface is required between PGW and AAA if S6b interface is already available.

+1 vote
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PGW is connected with AAA server with 2 interface .
1. SGI interface 2. S6b interface.

Why SGI is required if s6b is already there?

posted Apr 14, 2016 by Rakesh Kumar Suman

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1 Answer

+1 vote

S6B is between PGW and AAA, it is diameter based interface, where as SGi interface connects the PGW to a external network i.e. PDN. So both are serving different needs.

I hope I understood your query correctly.

answer Apr 14, 2016 by Salil Agrawal
I read some where, SGI is also connected between PGW and AAA. S6B is also between PGW and AAA.
What is the specific purpose for this two interface.
commented Apr 14, 2016 by Rakesh Kumar Suman
Hello Rakesh, As Salil mentioned above SGi interface is between PGW and external IP network while S6B is interface between PGW and AAA server. S6B interface comes into picture when UE connected to LTE network moves to non-3GPP access like wifi PGW authenticates the UE by using the AAA server.
commented Apr 14, 2016 by Vimal Kumar Mishra
One is 3gpp one is not
commented Dec 22, 2017 by anonymous
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