> CSCF Serving-CSCF Configuration Mode Commands
> The Serving-CSCF Configuration Mode is used to set various commands supporting the role of the CSCF service as a Serving CSCF.
> Important: The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
> 3gpp
> Enables/disables functionality related to 3GPP Release 8 support. This command is disabled by default.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ default | no ] 3gpp Rel8
> default | no
> Disables 3GPP Release 8 support.
> Usage
> Use this command to configure the S-CSCF to support 3GPP Release 8 functionality.
> alias-indication
> Enables/disables alias indication functionality, a collaborative information exchange between the S-CSCF and HSS. This command is disabled by default.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> [ default | no ] alias-indication
> default | no
> Disables alias indication functionality between the S-CSCF and HSS.
> Usage
> Use this command to display alias information from the HSS.
> If both the HSS and the S-CSCF support this feature, Alias Group IDs will be displayed in the output of the show subscribers cscf-only full command.
> Important: 3GPP Release 8 support must be enabled.
> allow
> Enables the function to allow IMS interworking with RFC3261 SIP User Agents.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ no ] allow rfc3261-ua-interworking
> no
> Disables the interworking capability.
> Usage
> Use this command to enable the S-CSCF to allow IMS interworking with RFC3261 SIP User Agents.
> authentication
> Configures the authentication method used by the S-CSCF service.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> authentication { aka-v1 value | allow-noauth [ invite | re-register| register ] | allow-noipauth [ invite | re-register| register ] | allow-unsecure | aor-auth | md5 value }
> no authentication { aka-v1 | allow-noauth [ invite | re-register| register ] | allow-noipauth [ invite | re-register| register ] | allow-unsecure | aor-auth | md5 }
> aka-v1 value
> Specifies that AKA-v1 algorithm is used as the authentication type when accessing the CSCF service. value specifies a preference - the lower the value, the higher the preference. value must be an integer from 1 to 1000.
> Important: In order to change a priority level, you must remove the original value and configure a new one.
> allow-noauth [ invite | re-register| register ]
> Specifies that access to the S-CSCF service is allowed if authentication fails.
> invite: Specifies that access to the S-CSCF service is allowed if authentication fails on INVITE requests only.
> re-register: Specifies that access to the S-CSCF service is allowed if authentication fails on RE-REGISTER requests when the request is integrity-protected only.
> registration: Specifies that access to the S-CSCF service is allowed if authentication fails on REGISTER requests only.
> allow-noipauth [ invite | re-register| register ]
> Specifies that access to the S-CSCF service is allowed if early IMS-based IP authentication fails.
> invite: Specifies that access to the S-CSCF service is allowed if early IMS-based IP authentication fails on INVITE requests only.
> re-register: Specifies that access to the S-CSCF service is allowed if authentication fails on RE-REGISTER requests when the request is integrity-protected only.
> registration: Specifies that access to the S-CSCF service is allowed if early IMS-based IP authentication fails on REGISTER requests only.
> allow-unsecure
> Specifies that un-secure access is allowed to the S-CSCF service.
> aor-auth
> Specifies that authentication is based on the AoR when accessing the S-CSCF service.
> md5 value
> Specifies that the MD5 algorithm is used as the authentication type for accessing the S-CSCF service. value specifies a preference - the lower the value, the higher the preference. value must be an integer from 1 to 1000.
> Important: In order to change a priority level, you must remove the original value and configure a new one.
> no authentication { aka-v1 | allow-noauth [ invite | re-register| register ] | allow-noipauth [ invite | re-register| register ] | allow-unsecure | aor-auth | md5 }
> Disables the specified authentication method for the S-CSCF service.
> Usage
> Use this command to configure the authentication method used by the S-CSCF service.
> Important: The S-CSCF supports multiple authorization schemes, but this requires disabling all authorization configured in the S-CSCF service so that it will send “Unknown” in the Sip-Authorization-Scheme AVP. This allows the HSS to dictate authorization. The following commands disable all authorization configured in the S-CSCF service to allow HSS to control authorization:
> authentication allow-noipauth
> allow rfc3261-ua-interworking
> no authentication aka-v1
> no authentication md5
> Example
> The following command configures the authentication method used by the S-CSCF service to MD5 with a preference of 3:
> authentication md5 3
> diversion-info
> Enabling this command prompts the service to add a diversion header (draft-levy-sip-diversion-08) when the call is diverted to a different endpoint due to a call feature. By default, diversion-info is disabled.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> [ default | no ] diversion-info
> default | no
> The service will not add a diversion header.
> Usage
> Use this command to enable the service to add a diversion header to call setup packets when calls are diverted due to the application of call features.
> end
> Exits the current mode and returns to the Exec Mode.
> Product
> All
> Privilege
> Administrator
> Syntax
> end
> Usage
> Change the mode back to the Exec mode.
> exit
> Exits the current mode and returns to the previous mode.
> Product
> All
> Privilege
> Administrator
> Syntax
> exit
> Usage
> Return to the previous mode.
> ims-restoration
> Enables/disables IMS restoration procedures. This feature is disabled by default.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> [ default | no ] ims-restoration
> default | no
> Disables IMS restoration procedures on the S-CSCF service.
> Usage
> Use this command to enable IMS REGISTER and INVITE restoration procedures defined in 3GPP TS 23.820.
> interrogating-cscf-role
> Enables the function to also perform as an Interrogating-CSCF.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ no ] interrogating-cscf-role
> no
> Disables the Interrogating-CSCF role in this function.
> Usage
> Use this command to enable the S-CSCF to also perform as an Interrogating-CSCF.
> local-call-features
> Enables/disables local call features. This command is disabled by default.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ default | no ] local-call-features
> default | no
> Disables local call features for this S-CSCF.
> Usage
> Use this command to enable local call features.
> network-id
> Configures the Network Identifier.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> network-id id
> [ no ] network-id
> id
> The Network Identifier of the entity.
> id must be from 1 to 79 alpha and/or numeric characters in length.
> no network-id
> Removes the configured Network Identifier of the entity.
> Usage
> The Network Identifier is used to compare with the P-Visited-Network-ID header received from P-CSCF to decide home or roaming subscriber at S-CSCF service.
> Example
> Sets the Network Identifier to pcscf01.company.com:
> network-id pcscf01.company.com
> policy
> Configures the policy for Served User Routing in this S-CSCF service.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ default | no ] policy allow p-served-user-routing
> allow p-served-user-routing
> Enables Served User Routing functionality for this S-CSCF.
> default | no
> Disables Served User Routing functionality for this S-CSCF.
> Usage
> Use this command to enable/disable the policy for Served User Routing.
> Example
> The following command enables Served User Routing on this service:
> policy allow p-served-user-routing
> The following command disables Served User Routing on this service:
> no policy allow p-served-user-routing
> registration
> Configures a registration lifetime for all subscribers to the service.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> registration lifetime { default sec | max sec | min sec }
> default registration lifetime
> { max sec | min sec | default sec }
> max sec: Specifies the maximum amount of time that a registration can exist on the system. sec must be an integer from 60 to 2147483646. Default is 86400. max sec must be > or = to min sec.
> min sec: Specifies the minimum amount of time that a registration can exist on the system. sec must be an integer from 60 to max sec -1. Default is 60. min sec must be < or = to max sec.
> default sec: Specifies the default amount of time that a registration can exist on the system. sec must be an integer from 60 to max sec -1. Default is 3761. default sec must be < or = to max sec and > or = to min sec.
> default registration lifetime
> Returns the command to the default settings.
> Usage
> Use this command to control the amount of time registrations are allowed to exist on this service.
> The system responds to registrations in the following manner:
> Using default values:

> • | If a registration with an expiration value lower than the service’s minimum (60) is received, the service will respond with a 423 Interval Too Small message.

> • | If a registration with an expiration value higher than the service’s maximum (2147483646) is received, the service will automatically reduce the expiration value to the default value.

> • | If a registration is received missing the “Expires” value, or the value is malformed, the service will automatically respond with 3761 in the 200OK message.

> Example
> The following command configures the maximum registration lifetime to 43200 (12 hours):
> registration lifetime max 43200
> reliable-prov-resp
> Enables/disables the reliability of provisional responses feature.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> reliable-prov-resp { mandatory | optional }
> no reliable-prov-resp
> mandatory | optional
> mandatory: Both inbound and outbound will request reliability.
> optional (default): Reliability is imposed by inbound side. Only if inbound call requests reliability will outbound also request reliability.
> no
> Disables the reliability of provisional responses feature.
> Usage
> Use this command to enable/disable the reliability of provisional responses feature.
> Example
> The following command sets the reliability of provisional responses feature to mandatory:
> reliable-prov-resp mandatory
> sifc
> Enables Shared Initial Filter Criteria (SiFC) functionality. This command is disabled by default.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> [ default | no ] sifc
> default | no
> Disables shared iFC functionality for this S-CSCF.
> Usage
> Use this command to configure the S-CSCF to share iFC functionality.
> If both the HSS and the S-CSCF support this feature, subsets of iFC may be shared by several service profiles. The HSS downloads the unique identifiers of the shared iFC sets to the S-CSCF. The S-CSCF uses a locally administered database to map the downloaded identifiers onto the shared iFC sets.
> If the S-CSCF does not support this feature, the HSS will not download identifiers of shared iFC sets.
> sip-header
> Enable SIP P-User-Database (PUD) header insertion for the S-CSCF service.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ no ] sip-header insert p-user-database
> p-user-database
> Inserts PUD header in SIP (REGISTER) message and Invite from I-CSCF to S-CSCF.
> no
> Disables SIP PUD header insertion for the S-CSCF service.
> Usage
> Enabling this command allows PUD header insertion in SIP (REGISTER) message and Invite from I-CSCF to S-CSCF.
> sip-request
> Configures SIP Request-related configuration in this S-CSCF service.
> Product
> SCM (S-CSCF, SIP Proxy)
> Privilege
> Administrator
> Syntax
> sip-request re-route { max-attempts attempts | response-code code }
> default sip-request re-route max-attempts
> no sip-request re-route response-code code
> re-route
> Specify SIP Request re-route related configuration.
> max-attempts attempts
> Specifies the maximum number of re-route attempts that a S-CSCF should allow for a given call before passing the negative response upstream.
> attempts must be an integer from 1 to 10.
> Default: 2
> response-code code
> Specifies the list of Response codes that will be considered as re-routable responses to a call attempt.
> code must be a three-digit integer from 400 to 699.
> Important: You may configure a maximum of five response code values per S-CSCF service.
> default sip-request re-route max-attempts
> Specifies a maximum number of two re-route attempts that a S-CSCF should allow for a given call before passing the negative response upstream.
> no sip-request re-route response-code code
> Disables the specified Response code.
> Usage
> Use this command to configure:

> • | list of Response codes that will be considered as re-routable responses to a call attempt.

> • | the maximum number of re-route attempts that a S-CSCF should allow for a given call before passing the negative response upstream.

> Example
> The following command configures the maximum number of re-route attempts to 5:
> sip-request re-route max-attempts 5
> tas
> Configures the S-CSCF to perform Telephony Application Server (TAS) functions.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> [ default | no ] tas
> default | no
> Disables the TAS feature for this S-CSCF.
> Usage
> Use this command to configure the S-CSCF to perform TAS functions.
> tas-service
> Identifies the name of the service configured on the system performing Telephony Application Server (TAS) functions.
> Product
> SCM (S-CSCF)
> Privilege
> Administrator
> Syntax
> tas-service name
> no tas-service
> name
> Specifies the name of the service configured on the system performing TAS functions. name must be from 1 to 63 alpha and/or numeric characters and be an existing service.
> no
> Removes the TAS name from the S-CSCF configuration.
> Usage
> Use this command to identify the name of the service configured on the system performing TAS functions
> Example
> The following command identifies the TAS service name as scscf3:
> tas-service scscf3

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