# GGSN Redundancy Statistics

1. Right-click on the MWAM Card and select Configure.
2. Select category MWAM module.
3. Select a row and click the Statistics button.
4. Select category GGSN Redundancy Statistics.

The following information appears:

> Message (cGgsnTotalMessages)

> PDP Context (cGgsnContextSetupMessages)

> Modify/ Update PDP (cGgsnContextModifyMessages)

> PDP Delete (cGgsnContextRemoveMessages)

> SGSN/GGSN Path Setup (cGgsnPathSetupMessages)

> Path Modify (cGgsnPathModifyMessages)

> Path Removal (cGgsnPathRemoveMessages)

### Message (cGgsnTotalMessages)

Maintains a count of the total number of messages of all kinds.

### PDP Context (cGgsnContextSetupMessages)

Packet Data Protocol (PDP) context is checkpointed to standby only after it goes to active.

Maintains a total count of PDP context setup messages. Trigger Condition: This counter is updated whenever a PDP context setup message is checkpointed to standby.

### Modify/ Update PDP (cGgsnContextModifyMessages)

When a PDP context is modified or updated, the categories get affected and a new quota is assigned to them. This new information must be checkpointed to the standby.

This object maintains the total number of context modify messages that are checkpointed to standby.

Trigger Condition: This counter is incremented whenever a context modify message is checkpointed to standby.

### PDP Delete (cGgsnContextRemoveMessages)

When the PDP context is deleted, the deletion event is checkpointed to the standby, so that the corresponding backup context is deleted as well.

This object maintains the total number of context removed messages which are checkpointed to standby.

Trigger Condition: The counter is incremented for every context remove message that is checkpointed.

### SGSN/GGSN Path Setup (cGgsnPathSetupMessages)

Messages (of any kind, such as PDP create/delete and so on) indicate the presence of other GSNs. Path is set up between GSNs when they transmit the messages.

This object contains the number of path setup messages between SGSN and GGSN.

Trigger Condition: This counter is updated for every path setup messages sent.

### Path Modify (cGgsnPathModifyMessages)

Number of path Modify messages. The information element (IE) recovery count is used to indicate restart of other GSN. Any change related to path or GSN will be checkpointed to standby.

Trigger Condition: This counter is incremented for every change related to path.

### Path Removal (cGgsnPathRemoveMessages)

Keeps track of all the path remove messages between GSNs. As long as the context remains established, the path between the GSNs is alive.

When the last context is released and the echo timer is not enabled, a path timer is started within which the PDP context is expected to keep the path live; when the timer expires, the path is removed.

Trigger Condition: This timer is triggered when a path between GSNs is removed.