# GGSN Access Point Extension

## Navigation

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

2. Select GGSN Access Point Extension from the Category list.

The following details are displayed:

> Access Point Identifier (cgprsAccPtIndex)

> Access Point List In Enable (cgprsAccPtIPAccListInEnable)

> Access Point List Out Enable (cgprsAccPtIPAccListOutEnable)

> RADIUS Accounting Server Response Enable (cgprsAccPtGtpRespMesgWaitAcctng)

> TPDU Source Address Verification (cgprsAccPtVerifyUpStrTpduSrcAddr)

> TPDU Destination Address Verification (cgprsAccPtVerifyUpStrTpduDstAddr)

> Inter Mobile Address Type (cgprsAccPtRedirInterMobilAddrTyp)

> Inter Mobile Address (cgprsAccPtRedirInterMobilAddr)

> Radius Server Request Suppressed (cgprsAccPtSuppressRadiusAttribs)

> Enable AAA Interim Accounting (cgprsAccPtInterimAccountinEnable)

> Radius Attribute Values (cgprsAccPtSetRadiusAttributes)

> Service Mode (cgprsAccPtOperationMode)

> Absolute Session Timer (cgprsAccPtAbsoluteSessionTimer)

> NAS Id (cgprsAccPtRadiusAttrNasId)

> Inbound Service Policy (cgprsAccPtPdpInServicePolicyName)

> Verify Domain (cgprsAccPtPppRegenVerifyDomain)

> Local Address Pool Name (cgprsAccPtIpAddrLocalPoolName)

> Service-Aware Billing (cgprsAccPtServiceAware)

> Downlink Next Hop Address Type (cgprsAccPtAdvDownlinkNextHopAddrType)

> Downlink Next Hop Address (cgprsAccPtAdvDownlinkNextHopAddr)

### Access Point Identifier (cgprsAccPtIndex)

A locally unique identifier for this access point on this GGSN.

### Access Point List In Enable (cgprsAccPtIPAccListInEnable)

When set to true, ACL denoted by cgprsAccPtIPAccListGroupIn becomes active. When set to false, it becomes inactive.

### Access Point List Out Enable (cgprsAccPtIPAccListOutEnable)

When set to true, ACL denoted by cgprsAccPtIPAccListGroupOut becomes active. When set to false, it becomes inactive.

### RADIUS Accounting Server Response Enable (cgprsAccPtGtpRespMesgWaitAcctng)

When set to true, GGSN waits for a RADIUS accounting response before sending a create PDP context response to the SGSN, for create PDP context requests received at a particular APN.

When set to false, GGSN sends create PDP response to SGSN after sending a RADIUS start accounting message to the RADIUS server (without waiting for a response from the RADIUS accounting server).

### TPDU Source Address Verification (cgprsAccPtVerifyUpStrTpduSrcAddr)

When set to true, GGSN checks the upstream TPDU source address against the address previously assigned to this user. If the addresses are different, the TPDU is dropped and cgprsAccPtSourceAddrViolTpdus is incremented. This check enables GGSN to restrict users with fake identity.

When set to false, no checking is performed by GGSN.

### TPDU Destination Address Verification (cgprsAccPtVerifyUpStrTpduDstAddr)

When set to true, GGSN checks the upstream TPDU destination address against the range of IP addresses reserved for PLMN devices. If there is a match, the TPDU is dropped and cgprsAccPtDestAddrViolTpdus is incremented. The configuration of IP address ranges reserved for PLMN device is out of the scope of this MIB. This check enables GGSN to protect GPRS networks from hackers who may try to flood the GGSN and PLMN nodes with intense data traffic.

When set to false, no checking is performed by GGSN.

### Inter Mobile Address Type (cgprsAccPtRedirInterMobilAddrTyp)

The type of Internet address by which cgprsAccPtRedirInterMobilAddr is reachable.

### Inter Mobile Address (cgprsAccPtRedirInterMobilAddr)

The IP address of the device to which inter-mobile traffic is redirected. When this redirection is active on an APN, before downstream packets exit GGSN, they are screened to see if they come from other GTP tunnels. If so, they are not GTP-tunneled downstream, but get redirected to the device. When set to zero, inter-mobile traffic is not redirected, i.e., the traffic gets switched through GGSN without going through any Gi interface.

### Radius Server Request Suppressed (cgprsAccPtSuppressRadiusAttribs)

Attributes that are suppressed by GGSN in its authorization and accounting requests to the RADIUS server.

### Enable AAA Interim Accounting (cgprsAccPtInterimAccountinEnable)

This is used to enable Interim Accounting for a PDP context on this APN. When set to true, accounting updates will be triggered whenever a update PDP request is received. This object can set to true only when accounting (cgprsAccPtAaaAccountingEnable) is enabled.

### Radius Attribute Values (cgprsAccPtSetRadiusAttributes)

Indicates the values set in various radius attributes by GGSN while communicating with the RADIUS server. When set to none - reset the value set using the options below:

- 'userNameMsisdn' - MSISDN of the mobile is sent in the user-name attribute.
- 'accSessIdChargingId' - Charging Id is sent in the accounting session id attribute.

### Service Mode (cgprsAccPtOperationMode)

Denotes the operation mode of this APN. Each mode has different PDP context activation and deactivation behaviors as given below:

- 'inService' - Normal operational mode in which all functions are allowed. cgprsAccPtInServiceNotif notification will be sent to indicate the state change.
- 'maintenance' - No new PDPs can be activated in this state. cgprsAccPtMaintenanceNotif notification will be sent to indicate the state change.

### Absolute Session Timer (cgprsAccPtAbsoluteSessionTimer)

Absolute session timer is a RADIUS attribute (#27) sent by the AAA server in the Access-Accept packet. GGSN will deactivate the PDP when this timer expires. Denotes the timer used by GGSN when the same is not received from the AAA server. Value of '0' denotes that the timer is disabled.

### NAS Id (cgprsAccPtRadiusAttrNasId)

Denotes the value used as NAS Id in the RADIUS access requests sent by GGSN on this APN. A zero length string needs to be set to unconfigure the NAS Id value.

### Inbound Service Policy (cgprsAccPtPdpInServicePolicyName)

The Per PDP Policy feature on GGSN ensures that the PDP contexts do not exceed bandwidth negotiated as part of the PDP context activation procedure. A service policy contains classification and policing parameters. Denotes the name of the service policy that is applicable to inbound traffic on all the PDPs pertaining to this APN.

### Verify Domain (cgprsAccPtPppRegenVerifyDomain)

When this is set to true, a PPP regen session creation would be rejected if the domain name in the PCO field is different from the APN name. This can only be set when cgprsAccPtPppRegenEnable is true.

### Local Address Pool Name (cgprsAccPtIpAddrLocalPoolName)

Represents the name of the local address pool used when cgprsAccPtIpAddressPool is set to local.

### Service-Aware Billing (cgprsAccPtServiceAware)

Enables service-aware billing (Diameter Credit Control Application [DCCA] support) on the access-point. This can be set only when the value of cGgsnSAServiceAware is set to true.

### Downlink Next Hop Address Type (cgprsAccPtAdvDownlinkNextHopAddrType)

Indicates the type of Internet address of downlink next hop address.

### Downlink Next Hop Address (cgprsAccPtAdvDownlinkNextHopAddr)

Advertises the next hop address on the GGSN to which downlink traffic destined for the GGSN is to be routed. The address type is given by cgprsAccPtAdvDownlinkNextHopAddrType.