# GGSN Redundancy Statistics Contd

## Navigation

1. Right-click the device, and select Monitor. The Monitor Device dialog box appears.

2. Select GGSN Redundancy Statistics Contd from the Category list.

The following information appears:

> Charging Gateway Ready (cGgsnCGFReadyMessages)

> Charging Gateway State Change (cGgsnCGFModifyMessages)

> Charging Gateway Removal (cGgsnCGFRemoveMessages)

> GGSN to GSN/CGF (cGgsnInternalStateMsgs)

> CAC Failure (cGgsnSlbCacFailures)

> Session Failures (cGgsnSlbSessionFailures)

### Charging Gateway Ready (cGgsnCGFReadyMessages)

Charging information is sent from a GGSN to the charging gateway. GTP protocol is used between them. This object consists of the total number of CGF ready messages.

Trigger Condition: The counter is incremented when a CGF ready message is checkpointed to standby.

### Charging Gateway State Change (cGgsnCGFModifyMessages)

Significant information related to change in state of CGF must be checkpointed to GGSN. This object indicates the total number of CGF modify messages received.

Trigger Condition: This counter is triggered when there is a change in CGF state.

### Charging Gateway Removal (cGgsnCGFRemoveMessages)

Counts all the messages responsible for CGF removal.

Trigger Condition: This counter is triggered when context is deleted.

### GGSN to GSN/CGF (cGgsnInternalStateMsgs)

GGSN sends certain information to other GSNs (SGSN) and CGF. On failover, this information must remain consistent. The information includes the following: information element recovery count sent to the other GSNs for path management, local record sequence number and charging ID, and so on.

Trigger Condition: The counter is incremented for each of these kinds of messages.

### CAC Failure (cGgsnSlbCacFailures)

Tracks the number of CAC failure notifications sent to SLB.

Trigger Condition: The counter is incremented whenever GGSN sends a CAC failure notification to SLB.

### Session Failures (cGgsnSlbSessionFailures)

Tracks the number of session failure notifications sent to SLB.

Trigger Condition: The counter is incremented whenever GGSN sends a session failure notification to SLB.