Table Of Contents

gprs fastswitch

gprs gtp error-indication throttle

gprs gtp map signalling tos

gprs gtp n3-buffer-size

gprs gtp n3-requests

gprs gtp path-echo-interval

gprs gtp t3-response

gprs gtp t3-tunnel

gprs idle-pdp-context purge-timer

gprs maximum-pdp-context-allowed

gprs qos default-response requested

gprs qos map canonical-qos

gprs radius msisdn first-byte

ip-access-group

ip-address-pool

msisdn suppression

protocol-type

radius-server

service gprs

gprs fastswitch

To enable the GPRS fast switching feature on the GGSN, use the gprs fastswitch command. To disable fast switching, use the no form of the command.

gprs fastswitch

no gprs fastswitch

Syntax Description

This command has no arguments or keywords.

Defaults

GPRS fast switching is disabled.

Command Modes

Interface configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs fastswitch command to enable the GPRS fast switching feature. This feature implements a fast switching packet cache and fast switching functions that enable faster processing of user packets transmitted using the user datagram protocol (UDP), significantly increasing the performance of the GGSN.

---

Note If you enable fast switching for the GTP protocol or for a virtual template (using the gprs fastswitch command), be sure to enable fast switching on each physical interface that a mobile station uses to access the GTP or the virtual template.

To enable fast switching on a physical interface, use the ip route-cache command.

Note also that if you enable fast switching on an SGSN, you should enable fast switching on the GGSNs with which the SGSN communicates.

---

Examples

The following example shows how to enable fast switching:

gprs fastswitch

Related Commands

Command	Description
ip route-cache	Enables fast switching on a physical interface.

gprs gtp error-indication throttle

To specify the maximum number of error indication messages that the GGSN sends out in one second, use the gprs gtp error-indication throttle command. To restore the default value (no error indication throttle is used), use the no form of the command (GGSN only).

gprs gtp error-indication throttle window-size size

no gprs gtp error-indication throttle

Syntax Description

window-size size

Counter that is decremented when an error indication message is sent and reset to the configured value after one second, with a value between 0 and 256.

Defaults

Error indication throttling is disabled.

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp error-indication throttle command to specify the maximum number of error indication messages that are sent by the GGSN in one second. This provides a way to implement flow control for transmission of GTP error messages.

If you do not issue the command, error indication throttling is not enabled. To restore the default value (error indication throttling is disabled) use the no form of the command.

Examples

The following example shows a throttle value of 150:

gprs gtp error-indication throttle window-size 150

gprs gtp map signalling tos

To specify an IP ToS mapping for GPRS tunneling protocol (GTP) signaling packets, use the gprs gtp map signalling tos global configuration command. To restore the default value for the command (5) use the no form of the command.

gprs gtp map signalling tos tos_value

no gprs gtp map signalling tos tos_value

Syntax Description

tos_value

Value between 0 and 7 that specifies the IP ToS mapping. The default value is 5.

Defaults

ToS value 5

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp map signalling tos command to specify the IP ToS mapping for GTP signaling packets transmitted by the GGSN. The higher the value, the higher the class of service provided to the packets.

Examples

The following example specifies a IP ToS mapping value of 3:

gprs gtp map signalling tos 3

Related Commands

Command	Description
gprs canonical-qos map tos	Specifies a QoS mapping from the canonical QoS classes to an IP ToS category.
gprs charging container volume-threshold	Specifies the maximum number of bytes that the GGSN maintains in a user's charging container before closing the charging container and updating the CDR.
gprs charging map data tos	Specifies an IP ToS mapping for GPRS charging data packets.
gprs charging packet-queue-size	Specifies the maximum number of unacknowledged charging data transfer requests that the GGSN maintains in its queue.
gprs charging transfer interval	Specifies the number of seconds that the GGSN waits before it transfers charging data to the charging gateway.

gprs gtp n3-buffer-size

To specify the size of the receive buffer that the GGSN uses to receive GTP signaling messages and packets sent through the tunneling protocol, use the gprs gtp n3-buffer-size global configuration command. To restore the default value for the N3 buffer, use the no form of the command.

gprs gtp n3-buffer-size bytes

no gprs gtp n3-buffer-size

Syntax Description

bytes

Value between 2048 and 65535 that specifies the size of the N3 buffer, in bytes. The default is 8192 bytes.

Defaults

8192 bytes

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp n3-buffer-size command to specify the size of the GTP N3 buffer on the GGSN. The N3 buffer is a receive buffer that the GGSN uses to receive GTP signaling messages and packets sent through the tunneling protocol. The recommended value for the N3 buffer size is 8192 (the default size).

Examples

The following example specifies a buffer size of 2084 bytes:

gprs gtp n3-buffer-size 2048

Related Commands

Command	Description
gprs gtp n3-requests	Specifies the maximum number of times that the GGSN attempts to send a signaling request.

gprs gtp n3-requests

To specify the maximum number of times that the GGSN attempts to send a signaling request, use the gprs gtp n3-requests global configuration command. To restore the default value (5 request attempts), use the no form of the command.

gprs gtp n3-requests requests

no gprs gtp n3-requests requests

Syntax Description

requests

A number between 1 and 65535 that specifies the number of times a request is attempted. The default is 5 requests.

Defaults

5 requests

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp n3-requests command to specify the number of times that the GGSN attempts to send a signaling request. The recommended value is 5 requests (the default).

Examples

The following example shows the GGSN attempting to send a signaling request 3 times:

gprs gtp n3-requests 3

Related Commands

Command	Description
gprs gtp n3-buffer-size	Specifies the size of the receive buffer that the GGSN uses to receive GTP signaling messages and packets sent through the tunneling protocol.

gprs gtp path-echo-interval

To specify the number of seconds that the GGSN waits before sending an echo-request message to check for GTP path failure, use the gprs gtp path-echo-interval global configuration command. To restore the default value for the path echo interval (60 seconds), use the no form of the command.

gprs gtp path-echo-interval interval

no gprs gtp path-echo-interval interval

Syntax Description

interval

Number of seconds that the GGSN waits before sending an echo-request message. Specify a value between 60 and 65535 seconds. The value 0 disables the echo-request feature. The default is 60 seconds.

Defaults

60 seconds

Command Modes

Global configuration mode

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp path-echo-interval command to specify the interval that the GGSN waits before sending an echo-request message to check for GTP path failure.

---

Note A value of 0 seconds disables the echo-request feature.

---

Examples

The following example shows the GGSN waiting 90 seconds before sending an echo-request message:

gprs gtp path echo-interval 90

gprs gtp t3-response

To specify the maximum time that the GGSN waits to respond to a signaling request message, use the gprs gtp t3-response global configuration command. To restore the default value for the response interval (1 second), use the no form of the command.

gprs gtp t3-response response_interval

no gprs gtp t3-response response_interval

Syntax Description

response_interval

A value between 1 and 65535 that specifies the length of the T3 response interval, in seconds. The default is 1 second.

Defaults

1 second

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp t3-response command to specify the maximum time that the GGSN waits to respond to a signaling request message.

Examples

The following example shows a T3 interval response interval of 524 seconds:

gprs gtp t3-response 524

Related Commands

Command	Description
gprs gtp t3-tunnel	Specifies the length of time that the GGSN waits, after receiving a GTP context request message from the SGSN, before forwarding a protocol data unit (PDU) to the requesting SGSN.

gprs gtp t3-tunnel

To specify the length of time that the GGSN waits, after receiving a GTP context request message from the SGSN and before forwarding a protocol data unit (PDU) to the requesting SGSN, use the gprs gtp t3-tunnel global configuration command. To restore the default value for the command (20 seconds), use the no form of the command.

gprs gtp t3-tunnel seconds

no gprs gtp t3-tunnel seconds

Syntax Description

seconds

A value between 1 and 65535 that specifies the interval the GGSN waits before forwarding a PDU to a requesting SGSN. The default is 20 seconds.

Defaults

20 seconds

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs gtp t3-tunnel command to specify the interval for which a GGSN waits to forward a PDU to a requesting SGSN. The recommended value is 20 seconds.

Examples

The following example shows GGSN waiting 60 seconds before forwarding a PDU to a requesting SGSN:

gprs gtp t3-tunnel 60

Related Commands

Command	Description
gprs gtp t3-response	Specifies the maximum time that the GGSN waits to respond to a signaling request message.

gprs idle-pdp-context purge-timer

To specify the time that the GGSN waits before purging idle mobile sessions, use the gprs idle-pdp-context purge-timer global configuration command. To restore the default value for the command (72 hours), use the no form of the command.

gprs idle-pdp-context purge-timer hours

no gprs idle-pdp-context purge-timer hours

Syntax Description

hours

Value between 0 and 255 that specifies the number of hours that the GGSN waits before purging idle sessions. The value 0 disables the purge timer. The default is 72 hours.

Defaults

72 hours

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

To specify the time that the GGSN waits before purging idle mobile sessions, use the gprs idle-pdp-context purge-timer command. To disable this feature, specify a purge-timer value of 0.

Examples

The following example specifies that the GGSN wait for 60 hours before purging idle sessions:

gprs idle-pdp-context purge-timer 60

gprs maximum-pdp-context-allowed

To specify the maximum number of PDP contexts (mobile sessions) that can be activated on the GGSN, use the gprs maximum-pdp-context-allowed global configuration command. To restore the default value for the command (1000 PDP contexts), use the no form of the command.

gprs maximum-pdp-context-allowed pdp_contexts

no gprs maximum-pdp-context-allowed pdp_contexts

Syntax Description

pdp_contexts

Integer between 1 and 4296967295 that specifies the number of active PDP contexts allowed. The default is 1000 PDP contexts.

Defaults

1000 PDP contexts

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the gprs maximum-pdp-context-allowed command to specify the maximum number of PDP contexts allowed on the GGSN. When the maximum allowable number of PDP contexts is reached, the GGSN refuses new PDP contexts (mobile sessions) until sessions are available.

---

Note The practical upper limit for the maximum number of PDP contexts depends on the router platform that you are using and the amount of memory available on the router.

---

Examples

In the following example 10000 PDP contexts are allowed on the GGSN:

gprs maximum-pdp-context-allowed 10000

Related Commands

Command	Description
gprs idle-pdp-context purge-timer	Specifies the time that the GGSN waits before purging idle mobile sessions.

gprs qos default-response requested

To configure the GGSN to set its default QoS values in the response message exactly as requested in the create PDP context request message, use the gprs qos default-response requested global configuration command. To return the GGSN to its QoS default of best-effort, use the no form of this command.

gprs qos default-response requested

no gprs qos default-response requested

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled. The GGSN sets its QoS default to the best-effort class.

Command Modes

Global configuration

Command History

Release	Modification
12.2(2)	This command was introduced.

Usage Guidelines

The gprs qos default-response requested command is only useful when canonical QoS is not configured on the GGSN. Canonical QoS is enabled using the gprs qos map canonical-qos command.

When canonical QoS is not enabled, and the gprs qos default-response requested command has not been configured on the GGSN, the GGSN always sets its QoS values to best-effort in the response message.

Examples

The following example enables the GGSN to set its QoS values in the response message according to the QoS values requested in the create PDP context request message:

gprs qos default-response requested

Related Commands

Command	Description
gprs qos map canonical-qos	Enables mapping of GPRS QoS categories to a canonical QoS method that includes best-effort, normal, and premium QoS classes.

gprs qos map canonical-qos

To enable mapping of GPRS QoS categories to a canonical QoS method that includes best-effort, normal, and premium QoS classes, use the gprs qos map canonical-qos global configuration command. To disable this mapping, use the no form of the command.

gprs qos map canonical-qos

no gprs qos map canonical-qos

Syntax Description

This command has no arguments or keywords.

Defaults

Canonical QoS mapping is disabled.

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the qprs qos map canonical-qos command to map GPRS QoS into the following canonical categories: best effort, normal, and premium.

Examples

The following example shows canonical QoS mapping enabled:

qos map canonical-qos

Related Commands

Command	Description
gprs canonical-qos gsn-resource-factor	Specifies a value that is used by the GGSN to calculate the QoS level provided to mobile users.
gprs canonical-qos map tos	Specifies a QoS mapping from the canonical QoS classes to an IP ToS category.
gprs canonical-qos premium mean-throughput deviation	Specifies a mean throughput deviation factor that the GGSN uses to calculate the allowable data throughput for QoS.

gprs radius msisdn first-byte

To specify that the first byte of the Mobile Stations International PSTN/ISDN (MSISDN) information element (IE) is included in a Remote Access Dial-In User Service (RADIUS) request, use the gprs radius msisdn first-byte global configuration command. To remove the first byte from the MSISDN IE in a RADIUS request, use the no form of the command.

gprs radius msisdn first-byte

no gprs radius msisdn first-byte

Syntax Description

This command has no arguments or keywords.

Defaults

The first byte is not included.

Command Modes

Global configuration

Command History

Release	Modification
12.2(1)	This command was introduced.

Usage Guidelines

Use the gprs radius msisdn first-byte command when configuring RADIUS security on the GGSN.

The first octet of an MSISDN IE using E.164 addressing is 91 in hexadecimal, that is 10010001. In this 91 code, the 1 is the extension bit, 001 is the international number, and 0001 indicates E.164 numbering.

Examples

The following example specifies that the first byte of the MSISDN IE is included in a RADIUS request:

gprs radius msisdn first-byte

Related Commands

Command	Description
gprs default radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses to authenticate mobile users for access to PDNs.
radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses at a particular access point to authenticate mobile users for access to a PDN.

ip-access-group

To specify access permissions between an MS and a PDN through the GGSN at a particular access point, use the ip-access-group access-point configuration command. To disable the input access list, use the no form of the command.

ip-access-group access_list_number {in | out}

no ip-access-group access_list_number {in | out}

Syntax Description

access_list_number	Number of an access list that has been set up using the access-list command.
in	The specified access list controls access from the PDN to the mobile station.
out	The specified access list controls access from the mobile station to the PDN.

Defaults

No access list is enforced.

Command Modes

Access-point configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the ip-access-group command to specify an access list that indicates whether users are given or denied permission to access the mobile station from the PDN through the GGSN using a specified access point.

Examples

The following example grants access-list 101 inbound access to the mobile station from the PDN through the GGSN:

access-list 101 permit ip 2.0.0.0 0.255.255.255 any

interface virtual-template 1

 ip address 100.10.10.1 255.255.255.0

 no ip directed-broadcast

 encapsulation gtp

 gprs access-point-list abc

!

gprs access-point-list abc

 access-point 1

  access-point-name gprs.somewhere.com

  dhcp-server 99.100.0.3

  ip-access-group 101 in

  exit

!

ip-address-pool

To specify a dynamic address allocation method using IP address pools for the current access point, use the ip-address-pool access-point configuration command. To restore the default value (to use the globally defined address-allocation method, which is set using the gprs default ip-address-pool command), use the no form of the command.

ip-address-pool {dhcp-proxy-client | radius-client | disable}

no ip-address-pool {dhcp-proxy-client | radius-client | disable}

Syntax Description

dhcp-proxy-client	The access-point IP address pool is allocated using a DHCP server.
radius-client	The access-point IP address pool is allocated using a RADIUS server.
disable	Disables dynamic address allocation for this access point.

Defaults

The global setting specified with the gprs default ip-address-pool command is used. The default value for the global configuration command is that IP address pools are disabled.

Command Modes

Access-point configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

You can specify an IP allocation method for an access point in two ways:

•Enter access-point configuration mode and use the ip address-pool command to specify an IP address allocation method for the current access point.

•Specify a global value for the IP address pool by issuing the gprs default ip-address-pool command. In that case, you do not need to specify an address-pool method for the specific access point.

If you specify dhcp-proxy-client as the method for allocating IP addresses, then you must configure a DHCP server for IP address allocation. You can do this at the global configuration level using the gprs default-dhcp server command, or at the access point level using the dhcp-server command.

If you specify radius-client as the method for allocating IP addresses, then you must configure a RADIUS server for IP address allocation. You can do this at the global configuration level using the gprs default radius-server command, or at the access point level using the radius-server command.

Examples

The following example sets up DHCP as the IP address pool allocation method for access-point 1 and specifies that the other access points use the global default, which is specified as RADIUS.

gprs default ip-address-pool radius-client

interface virtual-template 1

 ip address 100.10.10.1 255.255.255.0

 no ip directed-broadcast

 encapsulation gtp

 gprs access-point-list abc

!

gprs access-point-list abc

 access-point 1

  access-point-name gprs.everywhere.com

  ip address-pool dhcp-proxy-client

  dhcp-server 99.100.0.3     

  exit

!

 access-point 2

  access-point-name xyz.com

  access-mode non-transparent

  radius-server 99.100.0.2       

  exit

!

 access-point 3

  access-point-name www.acme.com

  access-mode non-transparent

  radius-server  99.100.0.2     

  exit

Related Commands

Command	Description
dhcp-server	Specifies a primary (and backup) DHCP server to allocate IP addresses to MS users entering a particular PDN access point.
gprs default dhcp-server	Specifies a default DHCP server from which the GGSN obtains IP address leases for mobile users.
gprs default ip-address-pool	Specifies a dynamic address allocation method using IP address pools for the GGSN.
gprs default radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses to authenticate mobile users for access to PDNs.
radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses at a particular access point to authenticate mobile users for access to a PDN.

msisdn suppression

To specify that the GGSN overrides the mobile station integrated services digital network (MSISDN) number with a pre-configured value in its authentication requests to a RADIUS server, use the msisdn suppression access point configuration command. To enable the GGSN to send the MSISDN number in authentication requests to a RADIUS server, use the no form of the command.

msisdn suppression [value]

no msisdn suppression [value]

Syntax Description

value

(Optional) String (up to 20 characters long) that the GGSN sends in place of the MSISDN number in authentication requests to a RADIUS server. Valid characters for the string are any of those accepted by the MSISDN encoding specifications, including the integers 0-9, and characters a, b, c, * and #. The default value is that no string is sent.

Defaults

The MSISDN number is suppressed, and no ID string is sent to the RADIUS server in place of the MSISDN number.

Command Modes

Access point configuration

Command History

Release	Modification
12.2(2)	This command was introduced.

Usage Guidelines

Certain countries have privacy laws which prohibit service providers from identifying the MSISDN number of mobile stations in authentication requests. Use the msisdn suppression command to specify a value that the GGSN sends in place of the MSISDN number in its authentication requests to a RADIUS server. If no value is configured, then no number is sent to the RADIUS server.

To use the msisdn suppression command, you must configure a RADIUS server either globally or at the access point and specify non-transparent access mode.

Examples

The following example will override the MSISDN ID sent in the create request and will not send any ID to the RADIUS server:

gprs access-point-list abc

   access-point 1

     radius-server 192.168.1.1

     access-mode non-transparent

     msisdn suppression

Related Commands

Command	Description
access-mode	Specifies whether the GGSN requests user authentication at the access point to a PDN.
radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses at a particular access point to authenticate mobile users for access to a PDN.

protocol-type

To specify the protocol type for the current access point, use the protocol-type access-point configuration command.

protocol-type ip

no protocol-type ip

Syntax Description

ip	Specifies that the access point will use the IP protocol

Defaults

IP

Command Modes

Access-point configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

The only protocol type supported is IP. This is enabled by default.

Since the X.25 protocol is not being implemented in the GSM standards, this command is no longer relevant.

Examples

The following example shows IP protocol is chosen:

protocol-type ip

radius-server

To specify a primary (and backup) RADIUS server that the GGSN uses at a particular access point to authenticate mobile users for access to a PDN, use the radius-server access-point configuration command. To delete the RADIUS server identification, use the no form of the command.

radius-server {ip-address | name} [{ip-address | name}]

no radius-server {ip-address | name} [{ip-address | name}]

Syntax Description

ip-address	IP address of a RADIUS server. The first IP address is the name of the primary RADIUS server. The second (optional) ip-address argument specifies the IP address of a backup RADIUS server.
name	Host name of a RADIUS server. The second (optional) name argument specifies the host name of a backup RADIUS server.

Defaults

No default behavior or values.

Command Modes

Access-point configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

You can specify a RADIUS server that the GGSN uses at a particular access point to authenticate mobile users for access to a PDN in two ways:

•Enter access-point configuration mode and use the radius-server command to specify a RADIUS server for the current access point.

•Specify a global value for the RADIUS server using the gprs default radius-server command. In this case, you do not need to specify a RADIUS server for the specific access point.

The optional second set of arguments specifies the name, or IP address, of a backup RADIUS server to use if the primary RADIUS server is unavailable. If you do not specify a backup RADIUS server, then there is not a backup available if the primary server fails.

You must specify a RADIUS server either at the global configuration level or at the access-point configuration level if you have specified radius-client as the method for maintaining an IP address pool using the gprs default ip-address-pool command, or at the access-point level using the ip-address-pool command. The RADIUS server is used for authentication of mobile station users; if the GGSN is used as a RADIUS client, it is used to authenticate users.

Examples

The following example specifies a RADIUS server for access-point 3:

 access-point 3

  access-point-name www.acme.com

  ip-address-pool radius-client

  access-mode non-transparent

  radius-server  99.100.0.2 99.100.0.3     

  exit

Related Commands

Command	Description
gprs default ip-address-pool	Specifies a dynamic address allocation method using IP address pools for the GGSN.
gprs default radius-server	Specifies a primary (and backup) RADIUS server that the GGSN uses to authenticate mobile users for access to PDNs.
ip-address-pool	Specifies a dynamic address allocation method for the current access point.

service gprs

To specify the type of GPRS support node that is enabled on the router, use the service gprs command. To disable GPRS support node functionality, use the no form of the command.

service gprs {sgsn-datacom | ggsn}

no service gprs {sgsn-datacom | ggsn}

Syntax Description

sgsn-datacom	Specifies that the router will function as a Serving GPRS Support Node (SGSN) datacom unit.
ggsn	Specifies that the router will function as a Gateway GPRS Support Node (GGSN).

Defaults

SGSN

Command Modes

Global configuration

Command History

Release	Modification
12.1(1)GA	This command was introduced.
12.1(3)T	This command was integrated in Cisco IOS Release 12.1(3)T.

Usage Guidelines

Use the service gprs command to specify the type of GPRS support node that will be maintained on the router.

Examples

The following example configures the GPRS support node as a GGSN:

service gprs ggsn