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    VSAs for Dynamic IP Interfaces Overview

    Table 1 describes the VSAs that apply to dynamic IP interfaces and are supported on a per-user basis from RADIUS. For details, see JunosE Link Layer Configuration Guide.

    Table 1: VSAs That Apply to Dynamic IP Interfaces

    VSA

    Description

    Type

    Length

    Subtype

    Subtype Length

    Value

    Ingress-Policy-Name

    Specifies the name of the input (ingress) policy

    26

    len

    10

    sublen

    string: input-policy-name

    Egress-Policy-Name

    Specifies the name of the output (egress) policy

    26

    len

    11

    sublen

    string: output-policy-name

    Ingress-Statistics

    Indicates whether statistics are collected on input

    26

    12

    12

    6

    integer: 0 – disable, 1 – enable

    Egress-Statistics

    Indicates whether statistics are collected on output

    26

    12

    13

    6

    integer: 0 – disable, 1 – enable

    QoS-Profile-Name

    Specifies the name of the QoS profile to attach to the interface

    26

    len

    26

    sublen

    string: qos-profile-name

    To use the VSAs shown in Table 1:

    • Specify the policy, or one or more QoS VSAs in the desired RADIUS user entries.
    • Create the ingress or egress policy, or the QoS profile. Policies minimally consist of one or more policy commands and may include classifier control lists and rate limit profiles. See the JunosE Policy Management Configuration Guide for more information about policies and policy routing. See the JunosE Quality of Service Configuration Guide for information about creating QoS profiles.

    When a dynamic interface is created according to a profile, the router checks with RADIUS to determine whether an input or output policy or a QoS profile must be applied to the interface. The VSA, if present, provides the name, enabling policy or QoS profile lookup. If found, the policy or QoS profile is applied to the dynamic interface.

    The router also determines whether the creation profile specifies any policies to be applied to the interface. Policies specified by the RADIUS VSA supersede any specified by the profile, as described in the following example:

    The RADIUS user entry includes an Ingress-Policy-Name VSA that specifies the policy input5. The profile specifies two policies, input7 and output1. In this case, the RADIUS-specified input policy (input5) and the profile-specified output policy (output1) are applied to the dynamic interface.

    For information about assigning policies via profiles, see the JunosE Policy Management Configuration Guide. Only attributes assigned by RADIUS appear in RADIUS Acct-Start messages. RADIUS attributes specified by a profile for dynamic interfaces do not appear in RADIUS Acct-Start messages because the profile is not active when the Acct-Start message is generated. These attributes appear in RADIUS Acct-Stop messages for a profile that is active when the session is terminated.

    The following section explains traffic shaping for PPP over ATM interfaces:

    Traffic Shaping for PPP over ATM Interfaces

    The router supports the configuration of traffic shaping parameters for PPP over ATM (PPPoA) via domain-based profiles and RADIUS. In connection with this feature, Table 2 describes VSAs that apply to dynamic IP interfaces and are supported on a per-user basis from RADIUS.

    Table 2: Traffic-Shaping VSAs That Apply to Dynamic IP Interfaces

    VSA

    Description

    Type

    Length

    Subtype

    Subtype Length

    Value

    Service-Category

    Specifies the type of service

    26

    12

    14

    6

    integer:
    1 – UBR
    2 – UBR PCR
    3 – NRT VBR
    4 – CBR
    5 – RT VBR

    PCR

    Specifies the value for the peak cell
    rate (PCR)

    26

    12

    15

    6

    integer

    SCR

    Specifies the value for the sustained cell rate (SCR)

    26

    12

    16

    6

    integer

    MBS

    Specifies the maximum burst size (MBS)

    26

    12

    17

    6

    integer

    To configure traffic-shaping parameters for PPPoA via domain maps, use the atm command in Domain Map Configuration mode.

     

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    Published: 2014-08-20