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Is it necessary for SGW to support all features which are being supported by MME and PGW ?

+3 votes
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Is it necessary for SGW to support all features which are being supported by MME and PGW ?
posted Apr 1, 2015 by Harshita

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LTE: Is it possible SGW and PGW support multiple IPs for GTP tunneling ?

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why MME will query for PGW prior to SGW

Hi Friends,
I saw somewhere that MME will also do a DNS query for P-GW. As i know S-Gw will do a query for P-Gw address. Is there any situation that MME will do a query for P-GW address using APN? and after this query how MME will use the P-Gw Address.

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