Cisco Cisco Packet Data Interworking Function (PDIF)
GTPP Accounting Overview
▀ GTPP Messages
▄ GTPP Interface Administration and Reference, StarOS Release 17
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Table 4. Node Alive Response Message
Information Element Presence Requirement
Private Extension
Optional
The optional Private Extension IE contains vendor- or operator-specific information.
Redirection Request
There are two use cases for the Redirection Request message:
One is to advise that received CDR traffic is to be redirected to another CGF due to the sending CGF node is
about to stop service (due to an outage for maintenance or an error condition).
The second purpose is to inform a CDF which is currently sending data to this node (e.g. CGF), that the next
node in the chain (e.g. a mediator device or Billing Computer) has lost connection to this node (e.g. CGF).
The Information Elements in a Redirection Request Message are listed in the following table. An Address of
Recommended Node may be given if, for example, a CGF maintenance outage is handled by first introducing another
CGF ready to take incoming CDRs. This way, the network performance can be maintained. The Address of
Recommended Node shall only describe an intra-PLMN node containing a CGF, and not a node in any other PLMN.
Recommended Node may be given if, for example, a CGF maintenance outage is handled by first introducing another
CGF ready to take incoming CDRs. This way, the network performance can be maintained. The Address of
Recommended Node shall only describe an intra-PLMN node containing a CGF, and not a node in any other PLMN.
Table 5. Redirection Request Message
Information Element
Presence Requirement
Cause
Mandatory
Address of Recommended Node
Optional
Alternative Address of Recommended Node Optional
Private Extension
Optional
Possible Cause values are:
This node is about to go down
Another node is about to go down
System failure
Receive buffers becoming full
Send buffers becoming full
The Address of Recommended Node IE, shown in the following figure, defines the IPv4 or IPv6 format address that the
node is identified by in the UMTS network.
node is identified by in the UMTS network.