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Example: Simple Shared Shaping for Ethernet

In a typical triple-play network configuration over Ethernet, individual subscribers are represented on the B-RAS by VLANs and DSLAMs by SVLANs. In this example, the provider shapes the subscriber aggregate of voice, video, and data to a single rate.

In this example, S-VLAN 0 has traffic in three traffic-class groups: the default group, the TC1 traffic class in the G1 group, and the TC2 traffic class in the G2 traffic-class group.

Figure 21: Hierarchical Simple Shared Shaping over Ethernet

Image g013271.gif

In Figure 21, the S-VLANs labeled 1, 2, and 3 indicate the possible constituents for S-VLAN 0. The active constituents for the simple shared shaper are the three nodes for S-VLAN 0 in the three traffic-class groups.

Note: This example uses QoS parameters to configure shared shaping.

  1. Configure the traffic classes and traffic-class groups.
    (config)#traffic-class tc1
    (config)#exit
    (config)#traffic-class tc2
    (config)#exit
    (config)#traffic-class-group g1
    (config-traffic-class-group)#traffic-class tc1
    (config-traffic-class-group)#exit
    (config)#traffic-class-group g2 extended
    (config-traffic-class-group)#traffic-class tc2
    (config-traffic-class-group)#exit
  2. Configure the parameter definitions.
    (config)#qos-parameter-define vlan-g1-max-rate
    (qos-parameter-define)#controlled-interface-type vlan
    (qos-parameter-define)#instance-interface-type vlan
    (qos-parameter-define)#exit
    (config)#qos-parameter-define svlan-g1-max-rate
    (qos-parameter-define)#controlled-interface-type svlan
    (qos-parameter-define)#instance-interface-type svlan
    (qos-parameter-define)#instance-interface-type ethernet
    (qos-parameter-define)#exit
    (config)#qos-parameter-define vlan-max-rate
    (qos-parameter-define)#controlled-interface-type vlan
    (qos-parameter-define)#instance-interface-type vlan
    (qos-parameter-define)#instance-interface-type svlan
    (qos-parameter-define)#exit
    (config)#qos-parameter-define svlan-max-rate
    (qos-parameter-define)#controlled-interface-type svlan
    (qos-parameter-define)#instance-interface-type svlan
    (qos-parameter-define)#instance-interface-type ethernet
    (qos-parameter-define)#exit
  3. Configure the shared shaper by referencing parameter definitions in the shaping-rate command.
    (config)#scheduler-profile vlan-be
    (config-scheduler-profile)#shared-shaping-rate vlan-max-rate simple
    (config-scheduler-profile)#exit
    (config)#scheduler-profile svlan-be
    (config-scheduler-profile)# shared-shaping-rate svlan-max-rate simple
    (config-scheduler-profile)#exit
    (config)#scheduler-profile svlan-g1
    (config-scheduler-profile)#shaping-rate svlan-g1-max-rate
    (config-scheduler-profile)#exit
    (config)#scheduler-profile vlan-g1
    (config-scheduler-profile)#shaping-rate vlan-g1-max-rate
    (config-scheduler-profile)#exit
    (config)#scheduler-profile svlan-g2
    (config-scheduler-profile)#shaping-rate svlan-max-rate % 50
    (config-scheduler-profile)#exit
  4. Configure the QoS profile.
    (config)#qos-profile svlan-4.1
    (config-qos-profile)#vlan queue traffic-class best-effort
    (config-qos-profile)#vlan node scheduler-profile vlan-be
    (config-qos-profile)#svlan node scheduler-profile svlan-be
    (config-qos-profile)#vlan queue traffic-class tc1
    (config-qos-profile)#svlan node scheduler-profile svlan-g1 group g1
    (config-qos-profile)#svlan queue traffic-class tc2
    (config-qos-profile)#svlan node scheduler-profile svlan-g2 group g2
    (config-qos-profile)#ethernet group g2 scheduler-profile default
  5. Attach the QoS profile to the S-VLANs on Fast Ethernet interface 11/0.
    (config)#interface fastEthernet 11/0
    (config-if)#svlan 0 qos-parameter svlan-max-rate 4000000
    (config-if)#svlan 0 qos-profile svlan-4.1
    (config-if)#encapsulation vlan
    (config-if)#exit
    (config)#interface fastEthernet 11/0.1
    (config-if)#svlan id 0 1
    (config-if)#ip address 1.2.1.1 255.255.255.0
    (config-if)#exit
    (config)#interface fastEthernet 11/0.2
    (config-if)#svlan id 0 2
    (config-if)#ip address 1.3.1.1 255.255.255.0
    (config-if)#exit

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