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    CoS Traffic Shaping Predefined Variables for Dynamic Interface Sets

    To control bandwidth at a household level in a subscriber access network, you can apply RADIUS CoS traffic-shaping attributes to a dynamic interface set and its member subscriber sessions when the member sessions are authenticated. The dynamic interface set, which represents the household level in a subscriber access network, can be either a dynamic agent-circuit-identifier (ACI) interface set or a non-ACI–based dynamic interface set. The subscriber sessions belonging to the interface set can be dynamic VLAN, DHCP, or PPPoE subscriber interfaces.

    To apply RADIUS CoS traffic-shaping attributes to both the dynamic interface set and its member subscriber sessions, you must configure two traffic-control profiles in the dynamic profile for the subscriber interface: one traffic-control profile for the “parent” dynamic interface set, and a second traffic-control profile for the dynamic subscriber interfaces. RADIUS tag values for the Junos OS CoS traffic-shaping predefined variables used in these traffic-control-profiles must be in the 100s range, as described in Table 1.

    To accommodate this feature, the set of existing $junos-cos-parameter predefined dynamic variables for traffic shaping have been duplicated and assigned a tag value in the 100s range, as listed in Table 1. The tag value is the only difference between the existing predefined dynamic variables and the predefined dynamic variables that you must use with this feature.

    For example, the existing $junos-cos-shaping-rate predefined variable is assigned RADIUS vendor ID 4874, attribute number 108, and tag value 2. To apply RADIUS CoS traffic-shaping attributes to the dynamic interface set and its member subscriber sessions, you must instead use the $junos-cos-shaping-rate predefined variable that is assigned RADIUS vendor ID 4874, attribute number 108, and tag value 102.

    Table 1 describes the Junos OS predefined dynamic variables and RADIUS tag values that you can use in a dynamic profile to apply RADIUS CoS traffic-shaping attributes to the dynamic interface set and its member subscriber sessions. The table lists the predefined dynamic variables in ascending order by tag value.

    Note: All of the predefined variables listed in Table 1 use RADIUS vendor ID 4874 and RADIUS attribute value 108.

    Table 1: Junos OS CoS Traffic Shaping Predefined Variables for Dynamic Interface Sets

    Predefined Variable

    RADIUS Tag Value

    Description

    $junos-cos-scheduler-map

    101

    Scheduler-map name configured in a traffic-control profile in a dynamic profile.

    $junos-cos-shaping-rate

    102

    Shaping rate configured in a traffic-control profile in a dynamic profile. Represents the maximum bandwidth of a CoS scheduler node.

    $junos-cos-guaranteed-rate

    103

    Guaranteed rate configured in a traffic-control profile in a dynamic profile. Represents the minimum bandwidth of a CoS scheduler node.

    $junos-cos-delay-buffer-rate

    104

    Delay-buffer rate configured in a traffic-control profile in a dynamic profile.

    $junos-cos-excess-rate

    105

    Excess rate configured in a traffic-control profile in a dynamic profile; scheduler weighting when operating in the excess region between the guranteed rate and the shaping rate.

    Note: Do not configure the $junos-cos-excess-rate variable when either the $junos-cos-excess-rate-high variable or the $junos-cos-excess-rate-low variable is configured.

    $junos-cos-traffic-control-profile

    106

    Traffic-control profile configured in a dynamic profile for subscriber access.

    $junos-cos-shaping-mode

    107

    Overhead-accounting mode configured in a traffic-control profile in a dynamic profile to shape downstream ATM traffic based on either frames (frame-mode) or cells (cell-mode).

    $junos-cos-byte-adjust

    108

    Byte adjustment value for the cell or frame shaping mode configured in a traffic-control profile in a dynamic profile.

    Note: Do not configure the $junos-cos-byte-adjust variable when either the $junos-cos-byte-adjust-frame variable or the $junos-cos-byte-adjust-cell variable is configured.

    $junos-cos-adjust-minimum

    109

    Minimum adjusted shaping rate configured in a traffic-control profile for a dynamic subscriber interface. Specifying this variable in a traffic-control profile for a dynamic interface set has no effect.

    $junos-cos-excess-rate-high

    110

    Shaping rate configured for excess high-priority traffic in a traffic-control profile in a dynamic profile.

    Note: Do not configure the $junos-cos-excess-rate-high variable when the $junos-cos-excess-rate variable is configured.

    $junos-cos-excess-rate-low

    111

    Shaping rate configured for excess low-priority traffic in a traffic-control profile in a dynamic profile.

    Note: Do not configure the $junos-cos-excess-rate-low variable when the $junos-cos-excess-rate variable is configured.

    $junos-cos-shaping-rate-burst

    112

    Burst size for the shaping rate configured in a traffic-control profile in a dynamic profile.

    $junos-cos-guaranteed-rate-burst

    113

    Burst size for the guaranteed rate configured in a traffic-control profile in a dynamic profile.

    $junos-cos-byte-adjust-frame

    114

    Overhead bytes when downstream ATM traffic is in frame-mode.

    Note: Do not configure the $junos-cos-byte-adjust-frame variable when the $junos-cos-byte-adjust variable is configured.

    $junos-cos-byte-adjust-cell

    115

    Overhead bytes when downstream ATM traffic is in cell-mode.

    Note: Do not configure the $junos-cos-byte-adjust-cell variable when the $junos-cos-byte-adjust variable is configured.

    $junos-cos-shaping-rate-priority-high

    116

    Shaping rate configured for high-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-priority-high-burst

    117

    Shaping rate burst size configured for high-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-priority-medium

    118

    Shaping rate configured for medium-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-priority-medium-burst

    119

    Shaping rate burst size configured for medium-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-priority-low

    120

    Shaping rate configured for low-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-priority-low-burst

    121

    Shaping rate burst size configured for low-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-excess-high

    122

    Shaping rate configured for excess high-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-excess-high-burst

    123

    Shaping rate burst size configured for excess high-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-excess-low

    124

    Shaping rate configured for excess low-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

    $junos-cos-shaping-rate-excess-low-burst

    125

    Shaping rate burst size configured for excess low-priority traffic in a traffic-control profile for a dynamic interface set or dynamic ACI interface set at a household level. Specifying this variable in a traffic-control profile for a dynamic subscriber interface is prohibited.

     

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    Published: 2013-02-11

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