3.73.3 MaxSessPerApnExceededSisInvocationFail

Measurement ID

11458

Measurement Group

SBR Binding Exception

Measurement Type

Simple

Measurement Dimension

Single

Description

The number of times a bound session was replaced due to Maximum Sessions Per IMSI being exceeded for an APN, but no session release RAR could be sent for the replaced session due to SIS queue full condition.

Collection Interval

5 min

Peg Condition

This measurement is incremented by one each time a bound session is replaced with a new session because the maximum session per APN limit is exceeded but SIS invocation failed because of the SIS queue being full.

Measurement Scope

Network

Recovery

1. When a new binding-capable session inititation request would exceed the per-APN session limit, P-DRA may attempt to replace an existing bound session. A bound session may be replaced if it exists for more than early binding lifetime and it is not in the "early" state (Early Master or Early Slave). When a bound session is replaced, P-DRA attempts to send a session release RAR to the session's PCEF to ensure that the PCEF and PCRF are both aware that the session is no longer valid. This measurement is pegged when the attempt to send the session release RAR has failed due to resource exhaustion in the P-DRA system. If this measurement is pegged and neither of these conditions are true, it is recommended to contact unresolvable-reference.html#GUID-F069C6FD-5BA3-4F31-AE9E-A187D5B5F729 for further assistance.
   • Connectivity has been lost with one or more PCRFs from a P-DRA site
   • A binding database reconfiguration is in progress and has been accelerated