Section: 16a.4.7 ASR Command
Content: The Abort-Session-Request (ASR) command, defined in IETF RFC 6733 (Diameter Base) [111], is indicated by the Command-Code set to 274 and the message flags’ ‘R’ bit set, is sent by the Diameter server to the GGSN to request that the PDP Context identified by the 3GPP-NSAPI AVP is to be terminated. The absence of the 3GPP-NSAPI AVP will indicate to the GGSN that all the PDP contexts for this particular user and sharing the same user session need to be deleted. Similarly, for P-GW, the ASR command is sent by the Diamater server to the P-GW to request that the EPS bearer identified by the 3GPP-NSAPI AVP is to be terminated. In the absence of the 3GPP-NSAPI AVP or if the value of 3GPP-NSAPI AVP points to the default EPS bearer, the P-GW shall terminate the IP-CAN session associated with the same user session. The relevant AVPs that are of use for the Gi/Sgi interface are detailed in the ABNF description below. Other valid AVPs for this command are not used for Gi/Sgi purposes and should be ignored by the receiver or processed according to the relevant specifications. The bold marked AVPs in the message format indicate optional AVPs for Gi/Sgi, or modified existing AVPs. Message Format: <ASR> ::= < Diameter Header: 274, REQ, PXY > < Session-Id > { Origin-Host } { Origin-Realm } { Destination-Realm } { Destination-Host } { Auth-Application-Id } [ Origin-State-Id ] * [ Proxy-Info ] [ 3GPP-NSAPI ] * [ Route-Record ] * [ AVP ]