Cisco ASR 5000 series Product Overview page 563

PDN Gateway Overview
Figure 140. PDN Connection Release by the HSGW Call Flow
UE
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Table 76.
Step Description
1 The UE is attached to the EPC and has a PDN connection with the P-GW for PDN-ID=x and APN with assigned HNP.
2 A PGW trigger causes a disconnect of the PDN connection for PDNID=x and the PGW sends a Binding Revocation
Indication (BRI) message to the HSGW with the following attributes: MNID, APN, HNP.
3 The HSGW responds to the BRI message with a Binding Revocation Acknowledgement (BRA) message with the sane
attributes (MNID, APN, HNP).
4 The HSGW MAG service triggers a disconnect of the UE PDN connection for PDNID=x.
5 The HSGW sends a PPP VSNCP-Term-Req with PDNID=x to the UE.
OL-22938-02
eAN/ePCF
Attached
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4
PPP VSNCP-Term-Req
PPP VSNCP-Term-Ack
RA
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PDN Connection Release by the HSGW Call Flow Description
HSGW (MAG)
PMIPv6 Tunnel
BRI
BRA
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MAG Disconnect UE
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How the PDN Gateway Works ▀
P-GW (LMA)
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Cisco ASR 5000 Series Product Overview ▄