# GGSN QOS Mapping

The GGSN QOS Mapping dialog box lists the mapping of different QoS classes to the ToS precedence classes in the IP header.

Note: This dialog box is available only if the value of cGtpGSNService is set to ggsn. If the value of cggsnQosMappingMethod is set to none, this table is empty.

## Navigation

1. Right-click the Multi-processor WAN Application Module (MWAM) and then select Configure, or double-click the module.

2. Select MWAM module from the Category drop-down box.

3. With a device selected in the MWAM module dialog box, click Configure.

4. Select GGSN QOS Mapping from the Category drop-down box.

The following information is displayed:

> Different QOS Classes (cggsnQosClass)

> IP TOS Precedence (cggsnQosMappedIpTos)

### Different QoS Classes (cggsnQosClass)

Specifies the different QoS classes of canonical or delay QoS, based on the value set to cggsnQosMappingMethod. The value is interpreted as shown in the following tables.

If cggsnQosMappingMethod is set to delay(3):

Value | Interpretation
1 | delay1
2 | delay2
3 | delay3
4 | delay_best_effort

If cggsnQosMappingMethod is set to canonical(2):

Value | Interpretation
1 | premium
2 | normal
3 | best_effort

### IP TOS Precedence (cggsnQosMappedIpTos)

IP ToS precedence to which cggsnQosClass is mapped. The service priority is directly proportional to the ToS precedence; that is, the higher the ToS precedence, the higher the service priority. ToS values of 6 (internetwork_control) and 7 (network_control) are not used in mapping.

There are six possible values for this object:

> routine(0)

> priority(1)

> immediate(2)

> flash(3)

> flash-override(4)

> critical(5)