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    Supported Attributes in Access-Request Messages

    The following tables indicate how the MobileNext Broadband Gateway processes RADIUS attributes and 3GPP VSAs in RADIUS Access-Request messages. An Access-Request message is sent by the broadband gateway to the RADIUS server to convey username, password, and other information to be used for authenticating a user.

    RADIUS IETF Attributes Supported in Access-Request Messages

    Table 1 lists the RADIUS attributes supported by the broadband gateway in Access-Request messages.

    Table 1: RADIUS IETF Attributes Supported in Access-Request Messages

    Attribute Number

    Attribute Name

    Description

    Content

    1

    User-Name

    The username is provided to the broadband gateway by the user in the Protocol Configuration Options (PCO) received during the IP-CAN session establishment procedure.

    If the PPP PDP type is used, it is provided to the broadband gateway by the user during the PPP authentication phase.

    If no username is available, then the option specified for the user-name parameter in the anonymous-user statement of the APN configuration is used instead.

    String

    2

    User-Password

    If Password Authentication Protocol (PAP) is used, the user password is provided to the broadband gateway by the user in the PCO received during the IP-CAN session establishment procedure.

    If the PPP PDP type is used, it is provided to the broadband gateway by the user during the PPP authentication phase.

    If no user password is available, then the password specified for the password parameter in the anonymous-user statement of the APN configuration is used instead.

    String

    3

    CHAP-Password

    If Challenge Handshake Authentication Protocol (CHAP) is used, the password provided by the user (extracted from the PCO field of the Create PDP Context Request message) or PPP authentication phase (if the PPP PDP type is used).

    String (can have two contiguous, with 0x00 in between)

    4

    NAS-IP-Address

    IPv4 address of the broadband gateway for communication with the RADIUS server.

    IPv4 address

    6

    Service-Type

    Type of service the user has requested or the type of service to be provided.

    2 (Framed)

    7

    Framed-Protocol

    Type of protocol for the user.

    7 (GPRS PDP context)

    8

    Framed-IP-Address

    IPv4 address allocated for this user

    IPv4 address

    9

    Framed-IP-Netmask

    Network mask allocated for this user’s IP address.

    IPv4 netmask

    30

    Called-Station-Id

    Identifier for the target network (APN).

    APN (UTF-8 encoded characters)

    31

    Calling-Station-ID

    Identifier for the mobile station (MS), configurable on a per-APN basis.

    MSISDN in international format, UTF-8 encoded decimal characters

    32

    NAS-Identifier

    Identifier of the NAS originating the request, may be configured as a user-specified prefix and the ID of the services PIC handling NAS functions for the session.

    String

    44

    Acct-Session-ID

    User Session identifier, unique for every bearer under the session.

    Broadband gateway Gn IP address (IPv4 or IPv6) and Charging-ID, concatenated in a UTF-8-encoded hexadecimal value

    60

    CHAP-Challenge

    The CHAP Challenge is provided to the broadband gateway by the user in the PCO received during the IP-CAN session establishment procedure.

    If the PPP PDP type is used, it is provided to the broadband gateway by the user during the PPP authentication phase.

    String

    61

    NAS-Port-Type

    Type of physical port the broadband gateway is using to authenticate the user, may be configured on the broadband gateway as virtual or wireless

    Integer value indicating the port type (wireless or virtual) as specified in RFC 2865

    97

    Framed-IPv6-Prefix

    IPv6 prefix that is configured for the user, can be used as a hint by the NAS to the RADIUS server that it would prefer this prefix.

    Value indicating the prefix, as specified in RFC 3162

    3GPP VSAs Supported in Access-Request Messages

    Table 2 lists the 3GPP vendor-specific attributes (VSAs) supported by the broadband gateway in Access-Request messages.

    Table 2: 3GPP VSAs Supported in Access-Request Messages

    Attribute Number

    Attribute Name

    Description

    Content

    26/10415/1 (3GPP type 1)

    3GPP-IMSI

    IMSI for this user.

    UTF-8 encoded string

    26/10415/2

    3GPP-Charging-Id

    Charging ID for this PDP context/EPS bearer.

    Integer

    26/10415/3

    3GPP-PDP Type

    For a GGSN, this indicates the type of PDP context; for example, IP or PPP.

    For a P-GW, this indicates the PDN type: IPv4, IPv6, or IPv4v6.

    Integer

    26/10415/4

    3GPP-CG-Address

    Charging gateway IP address.

    IPv4 address, or 0.0.0.0 if no charging gateway is configured on the broadband gateway.

    26/10415/5

    3GPP-GPRS-Negotiated-QoS-Profile

    QoS profile applied by the broadband gateway for the PDP context/EPS bearer.

    UTF-8 encoded string

    26/10415/6

    3GPP-SGSN-Address

    For a GGSN, this represents the SGSN IPv4 address that is used by the GTP control plane for the handling of control messages.

    For a P-GW, this represents the IPv4 address of the S-GW, trusted non-3GPP IP access or ePDG that is used on S5/S8, S2a or S2b for the handling of control messages.

    This attribute may be used to identify the PLMN to which the user is attached.

    IPv4 address

    26/10415/7

    3GPP-GGSN-Address

    For a GGSN, this represents the GGSN IPv4 address that is used by the GTP control plane for the context establishment.

    For a P-GW, this represents the P-GW IPv4 address that is used on the S5/S8, S2a, S2b or S2c control plane for the IP-CAN session establishment.

    The address is the same as the GGSN/P-GW IPv4 address used in the CDRs generated by the broadband gateway.

    IPv4 address

    26/10415/8

    3GPP-IMSI-MCC-MNC

    The MCC and MNC extracted from the user’s IMSI (first 5 or 6 digits, as applicable from the presented IMSI).

    String

    26/10415/9

    3GPP-GGSN- MCC-MNC

    The MCC and MNC of the network to which the broadband gateway belongs.

    String

    26/10415/10

    3GPP-NSAPI

    Identifier for a particular PDP context for the associated PDN and MSISDN/IMSI, from creation to deletion.

    For a P-GW, this identifies the EPS bearer ID if it is known to the P-GW.

    String

    26/10415/12

    3GPP- Selection-Mode

    Selection mode for this PDP context/EPS bearer, received in the Create PDP Context/Session Request message.

    String

    26/10415/13

    3GPP-Charging-Characteristics

    For a GGSN, this contains the charging characteristics for this PDP context, received in the Create PDP Context Request message (only available in R99 and later releases).

    For a P-GW, this contains the charging characteristics for the IP-CAN bearer.

    String

    26/10415/18

    3GPP-SGSN-MCC-MNC

    The MCC and MNC extracted from the RAI from the Create PDP Context Request and Update PDP Context Request messages.

    String

    26/10415/20

    3GPP-IMEISV

    International Mobile Station Equipment Identity and Software Version Number (IMEISV).

    String (UTF-8 encoded characters)

    26/10415/21

    3GPP-RAT-Type

    The Radio Access Technology type that is currently serving the user equipment.

    Octet string

    26/10415/22

    3GPP-User-Location-Info

    Information about where the user equipment is currently located (for example, SAI or CGI).

    Octet string

    26/10415/23

    3GPP-MS-TimeZone

    The offset between UTC and local time in steps of 15 minutes of where the MS currently resides.

    Octet string

    26/10415/26

    3GPP-Negotiated-DSCP

    DSCP used to mark the IP packets of this PDP context on the Gi interface, or EPS bearer context on the SGi interface.

    Octet string

    26/10415/27

    3GPP-Allocate-IP-Type

    Indicates whether the Access-Request message is sent for user authentication only, or for allocation of IPv4 or IPv6 addresses, or both.

    Octet string

    Published: 2011-11-23