> Gs Service Configuration Mode Commands
> The Gs Service configuration mode configures the parameters used to setup and maintain a Gs interface for a connection between the SGSN and an MSC/VLR.
> Upon accessing this mode, your prompt should look similar to the following:
> [<context_name>]<hostname>(config-gs-service)#
> Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
> associate-sccp-network
> This command associates a previously defined Signaling Connection Control Part (SCCP) network instance with the Gs service. This association is required to access Visitor Location Register(s) (VLRs).
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> associate-sccp-network sccp_net_id
> no associate-sccp-network
> no
> Removes the associated SCCP network configuration instance from this Gs service configuration.
> sccp_net_id
> Identifies the SCCP network configuration instance to associate with this Gs interface to enable connection with VLR(s).
> sccp_network_num: Must be an integer from 1 through 12.
> Usage
> Use this command to associate the SCCP network configuration instance with the Gs interface in this service.
> Important: A single SCCP network configuration instance can not be shared with multiple Gs services.
> Important: To enable a Gs service, the user needs to configure ssn with the bssap+ command.
> Example
> Following command associates SCCP network 2 with this Gs service.
> associate-sccp-network 2
> bssap+
> This command defines the Base Station System Application Part Plus configuration parameters for the Gs service to enable the SGSN to access a Visitor Location Register(s) (VLRs).
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> bssap+ ssn ss_num
> no bssap+ ssn ss_num
> no
> Removes the configured BSSAP+ subsystem number from this Gs service.
> ssn ss_num
> Specifies the subsystem number to configure in this Gs interface to use BSSAP+.
> ss_num must be an integer from 1 through 255.
> Usage
> Use this command to configure the BSSAP+ subsystem with Gs interface in this service to communicate with VLR(s).
> Important: A single SCCP network configuration instance can not be shared with multiple Gs services.
> Important: To start a Gs service, the user needs to configure the command parameter.
> Example
> Following command configures subsystem 101 with BSSAP+ in this Gs service.
> bssap+ ssn 101
> end
> Exits the current configuration mode and returns to the Exec mode.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> end
> Usage
> Return to the Exec mode.
> exit
> Exits the current configuration mode and returns to the previous configuration mode.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> exit
> Usage
> Return to the previous configuration mode.
> max-retransmission
> This command configures the retransmission values for different procedure counters in Gs service as described in TS 29.018.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> max-retransmissions { n8 | n9 | n10 | n12 } retrans_num
> default max-retransmissions { n8 | n9 | n10 | n12 }
> no
> Removes the configured Gs procedures from this Gs service.
> { n8 | n9 | n10 | n12 }
> Specifies the various Gs service procedures that are available to be used to communicate with VLR(s).

> • | n8: Defines the maximum number of retries for explicit IMSI detach from a non-GPRS service. Default is 2.

> • | n9: Defines the maximum number of retries for explicit IMSI detach from a non-GPRS service. Default is 2.

> • | n10: Defines the maximum number of retries for implicit IMSI detach from the GPRS service. Default is 2.

> • | n12: Defines the maximum number of retries for BSSAP+ to send Reset Indication messages. Default is 2.

> retrans_num
> Default: 2
> Specifies the number of re-transmission of message for specified procedures.
> retrans_num: Must be an integer from 0 through 10.
> Usage
> Use this command to configure the retransmission values for specific procedure counters in Gs service. counters are based on TS 29.018.
> This command can be entered for each procedure counter separately.
> Example
> Following command configure retransmission value as 3 for counter for procedure to send BSSAP+ Reset Indication messages in this Gs service.
> max-retransmissions n12 3
> non-pool-area
> This command creates a non-pool area for a set of subscriber location area code (LAC) values that can be used with a specific VLR for the Gs service.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> non-pool-area non_pool_name { use-vlr vlr_name lac lac_num } +
> no non-pool-area non_pool_name [ lac lac_num
> no
> Removes the configured non-pool area from this Gs service.
> non_pool_name
> Specifies the name of the non-pool area to configure with this command.
> non_pool_name must be an alpha and/or numeric string of 1 to 63 characters.
> use-vlr vlr_name
> Specifies the name of the VLR to be associated with this non-pool area.
> vlr_name is the name of VLR and must be an alpha and/or numeric string of 1 to 63 characters.
> lac lac_num
> Specifies the subscribers’ location area code to be attached with this non-pool area and specific VLR. This LAC of subscriber is obtained from the radio area indicator (RAI).
> Including this keyword with the no form of the command enables the operator to remove a specific LAC from the non-pool area configuration.
> lac_num is the LAC value and must be an integer value from 1 through 65535.
> +
> More than one lac_num, separated by a space, can be entered within a single command.
> Usage
> This command can be repeated as necessary to define a total of 32 configured LACs for the combined non-pool-area and pool-area configurations per Gs service.
> Example
> Following command configure a non-pool area starpool1 to use VLR named starvlr1 for LAC 101 in a Gs service.
> non-pool-area starpool1 use-vlr starvlr1 lac 101
> pool-area
> This command creates a pool area configuration instance. This command also enters the Pool Area configuration mode to define the set of VLRs to use for a pool area for a set of subscriber location area code (LAC) values in the Gs service.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> pool-area pool_name [ -noconfirm ]
> no pool-area non_pool_name
> no
> Removes the configured pool area from this Gs service.
> pool_name
> Specifies the name of the pool area to configure with this command for VLR pooling and association of a LAC.
> pool_name: Must be an alpha and/or numeric string of 1 to 63 characters.
> -noconfirm
> Indicates that the command is to execute without any additional prompt and confirmation from the user.
> Usage
> Use this command to create/enter the pool area configuration mode. This mode is used configure the set of VLRs to be used for a set of subscriber LAC.
> This command can be used multiple times, subject to a limit of 128 LAC values (the total number of non-pool-area and pool-area configurations) per Gs service.
> Example
> The following command configures a pool area named starpool1 in a Gs service without any confirmation prompt.
> pool-area starpool1 -noconfirm
> sgsn-number
> Define the SGSN’s E164 number to associate an SGSN with this Gs Service.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> sgsn-number E.164_number
> E.164_number
> Defines the SGSN’s ‘telephone’ number, the ISDN number for per ITU-T E.164 numbering plan. The number must be a numerical string of 1 to 15 digits.
> Usage
> For releases 8.1 or higher, use this command to define the SGSN’s E.164 ISDN number. This value should match the sgsn-number defined for SGSN Service or GPRS Service.
> Important: Note: the Gs Service will not start unless the SGSN’s E.164 number is configured.
> Example
> sgsn-number 12345678901234
> timeout
> This command configures various timers defining the wait before retransmitting a specific message for Gs service procedures.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> timeout { t6-1-timer t6_1_dur | t8-timer t8_dur | t9-timer t9_dur | t10-timer t10_dur | t12-1-timer minute t12_1_dur | t12-2-timer t12_2_dur}
> [ default ] timeout { t6-1-timer | t8-timer | t9-timer | t10-timer | t12-1-timer | t12-2-timer }
> default
> Sets the timer value to wait in seconds/minutes to default values. Default values for timers are:

> • | t6-1-timer: 10 seconds

> • | t8-timer: 4 seconds

> • | t9-timer: 4 seconds

> • | t10-timer: 4

> • | t12-1-timer: 54 mins (+ 8 seconds)

> • | t12-2-timer: 4 seconds

> t6-1-timer t6_1_dur
> Default: 10
> Specifies the retransmission timer value to guard the location update.
> t6_1_dur is the waiting duration in seconds before retransmitting the specific message and must be an integer from 10 through 90.
> t8-timer t8_dur
> Default: 4
> Specifies the retransmission timer value to guard the explicit IMSI detach from the GPRS service procedure.
> t8_dur is the waiting duration in seconds before retransmitting the specific message and must be an integer from 1 through 30.
> t9-timer t9_dur
> Default: 4
> Specifies the retransmission timer value to guard the explicit IMSI detach from the non-GPRS service procedure.
> t9_dur is the waiting duration in seconds before retransmitting the specific message and must be an integer from 1 through 30.
> t10-timer t10_dur
> Default: 4
> Specifies the retransmission timer value to guard the implicit IMSI detach from the GPRS service procedure.
> t10_dur is the waiting duration in seconds before retransmitting the specific message and must be an integer from 1 through 30.
> t12-1-timer minute t12_1_dur
> Default: 54 minutes (plus 8 seconds for transmission delay)
> Specifies the retransmission timer value to control the resetting of SGSN-Reset variable procedure.
> t12_1_dur is the waiting duration in minutes before retransmitting reset message for the SGSN Reset variable and must be an integer from 0 through 384.
> t12-2-timer t12_2_dur
> Default: 4
> Specifies the retransmission timer value to guard the SGSN reset procedure.
> t12_2_dur is the waiting duration in seconds before retransmitting the specific message and must be an integer from 1 through 120.
> Usage
> Use this command to configure the time, for different procedure timers, to wait before retransmitting a procedure message.
> This command can be repeated for each timer to configure multiple timers.
> Example
> Following command sets the timeout duration of 4 seconds for t8 timer to wait before retransmitting the procedure message to explicitly do the IMSI detach from GPRS service:
> default timeout t8-timer
> vlr
> This command defines a VLR configuration for use with this Gs service.
> Product
> SGSN
> Privilege
> Security Administrator, Administrator
> Syntax
> vlr vlr_name isdn-number E164_num [ bssap+ ssn ssn ] [ point-code pt_code ]
> no vlr vlr_name
> no
> Removes the configured VLR from the Gs service.
> vlr_name
> Specifies the name of the VLR to configure in this Gs mode with ISDN number.
> vlr_name must be an alpha and/or numeric string of 1 to 63 characters.
> isdn-number E164_num
> Specifies the VLR number to configure with this command.
> E164_num: The ISDN number for the target VLR. Value must be defined according to the E.164 numbering plan and must be a numeric string of 1 to 15 digits.
> bssap+ ssn ssn
> Specifies the subsystem number to configure with this VLR to use BSSAP+.
> ssn: Must be an integer from 1 through 255. Default value is 252.
> point-code pt_code
> Specifies SS7 address of VLR in point code value to this configured VLR name.
> pt_code: Must be in SS7 point code dotted-decimal ###.###.### format or decimal ######## format.
> Usage
> Use this command to define VLR configuration instances to be associated with the Gs service.
> A maximum of 32 VLRs can be configured per Gs service.
> Example
> Following command configures the VLR named starvlr1 with an ISDN number 12344567, a subsystem number of 252, and a point code value of 123.345.567:
> vlr starvlr1 isdn-number 12344567 point-code 123.345.567

Cisco Systems Inc.
Tel: 408-526-4000
Fax: 408-527-0883