Event triggers (Event-Trigger AVP)

Table 1. Event triggers (Event-Trigger AVP)
Event trigger ID	Event trigger name	Description
2	RAT_CHANGE	For GTP S11 access, this is triggered if a new RAT Type is received in GTP.
13	USER_LOCATION_CHANGE	For WLAN-GW, this is triggered for any UE location change. For GTP S11 access, this is triggered if a ULI was received in GTP with either non-ECGI/TAI values or a ECGI/TAI value that changed.
14	NO_EVENT_TRIGGERS	Sent in CCA and RAR by the PCRF to indicate that PCRF does not require any Event Trigger notification except for those events that do not require subscription and are always provisioned.
18	UE_IP_ADDRESS_ALLOCATE	When used in a CCR command, this value indicates that the 7750 SR generated the request because a client’s IPv4 address is allocated. The Framed-IP-Address, Framed-IPv6-Prefix, Delegated-IPv6-Prefix or Alc-IPv6-Address AVPs is provided in the same request. This event trigger is reported when the corresponding event occurs, even if the event trigger is not provisioned by the PCRF.
19	UE_IP_ADDRESS_RELEASE	When used in a CCR command, this value indicates that the 7750 SR generated the request because a client’s IP address/prefix is released. The Framed-IP-Address, Framed-IPv6-Prefix, Delegated-IPv6-Prefix or Alc-IPv6-Address AVPs is provided in the same request. This event trigger shall be reported when the corresponding event occurs, even if the event trigger is not provisioned by the PCRF.
21	AN_GW_CHANGE	This value is sent by the PCRF to inform the Diameter client in the SR to trigger a notification for every subscriber during a switchover in a multi-chassis configuration. This notification contains the IP address of the newly active BNG (AN_GW_ADDRESS) sent in a CCR-U message. If the Diameter client in the SR OS node is not armed with this event-trigger, the subscriber switchover is not reported to the PCRF.
22	SUCCESSFUL_RESOURCE_ALLOCATION	Not supported.
26	TAI_CHANGE	For GTP S11 access, this is triggered if a ULI is signaled in GTP with a TAI that changed from the last value received.
27	ECGI_CHANGE	For GTP S11 access, this is triggered if a ULI is signaled in GTP with a ECGI that changed from the last value received.
33	USAGE_REPORT	This value is used in a CCA and RAR commands by the PCRF when requesting usage monitoring on the 7750 SR. The PCRF also provides in the CCA or RAR command the Usage-Monitoring-Information AVPs including the Monitoring-Key AVP and the Granted-Service-Unit AVP. When used in a CCR command, this value indicates that the 7750 SR generated the request to report the accumulated usage for one or more monitoring keys. The 7750 SR provides the accumulated usage volume using the Usage-Monitoring-Information AVPs including the Monitoring-Key AVP and the Used-Service-Unit AVP.

2

RAT_CHANGE

For GTP S11 access, this is triggered if a new RAT Type is received in GTP.

13

USER_LOCATION_CHANGE

For WLAN-GW, this is triggered for any UE location change.

For GTP S11 access, this is triggered if a ULI was received in GTP with either non-ECGI/TAI values or a ECGI/TAI value that changed.

14

NO_EVENT_TRIGGERS

Sent in CCA and RAR by the PCRF to indicate that PCRF does not require any Event Trigger notification except for those events that do not require subscription and are always provisioned.

18

UE_IP_ADDRESS_ALLOCATE

When used in a CCR command, this value indicates that the 7750 SR generated the request because a client’s IPv4 address is allocated. The Framed-IP-Address, Framed-IPv6-Prefix, Delegated-IPv6-Prefix or Alc-IPv6-Address AVPs is provided in the same request. This event trigger is reported when the corresponding event occurs, even if the event trigger is not provisioned by the PCRF.

19

UE_IP_ADDRESS_RELEASE

When used in a CCR command, this value indicates that the 7750 SR generated the request because a client’s IP address/prefix is released. The Framed-IP-Address, Framed-IPv6-Prefix, Delegated-IPv6-Prefix or Alc-IPv6-Address AVPs is provided in the same request. This event trigger shall be reported when the corresponding event occurs, even if the event trigger is not provisioned by the PCRF.

21

AN_GW_CHANGE

This value is sent by the PCRF to inform the Diameter client in the SR to trigger a notification for every subscriber during a switchover in a multi-chassis configuration. This notification contains the IP address of the newly active BNG (AN_GW_ADDRESS) sent in a CCR-U message.

If the Diameter client in the SR OS node is not armed with this event-trigger, the subscriber switchover is not reported to the PCRF.

22

SUCCESSFUL_RESOURCE_ALLOCATION

Not supported.

26

TAI_CHANGE

For GTP S11 access, this is triggered if a ULI is signaled in GTP with a TAI that changed from the last value received.

27

ECGI_CHANGE

For GTP S11 access, this is triggered if a ULI is signaled in GTP with a ECGI that changed from the last value received.

33

USAGE_REPORT

This value is used in a CCA and RAR commands by the PCRF when requesting usage monitoring on the 7750 SR. The PCRF also provides in the CCA or RAR command the Usage-Monitoring-Information AVPs including the Monitoring-Key AVP and the Granted-Service-Unit AVP.

When used in a CCR command, this value indicates that the 7750 SR generated the request to report the accumulated usage for one or more monitoring keys. The 7750 SR provides the accumulated usage volume using the Usage-Monitoring-Information AVPs including the Monitoring-Key AVP and the Used-Service-Unit AVP.