* Indirect data forwarding is needed only in case there is no Userplane available between source eNB- Target eNB/Target-Rnc.
* Indirect tunnel is created between
Source eNB - Source SGW - Target SGW - Target eNB.
*Used for forwarding the buffered traffic from old-eNB, Here MME can select a new SGW to forward this traffic.
i.e Source eNB -- New SGW - Target SGW - Target eNB.
The New SGW being selected acts just a next-hop router.
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