Technical Documentation

Configuring a Parameter Definition for IP Multicast Bandwidth Adjustment

Before you configure a parameter definition for IP multicast bandwidth:

  • Define a multicast bandwidth map and the QoS adjustment for a virtual router.

    See JUNOSe Multicast Routing Configuration Guide.

To associate a parameter instance with the IP multicast bandwidth adjustment application:

  1. Configure traffic classes.
    host1(config)#traffic-class voice
    host1(config-traffic-class)#exit
    host1(config)#traffic-class best-effort
    host1(config-traffic-class)#exit
  2. Create a parameter definition.
    1. Configure the QoS parameter name and the application.
      host1(config)#qos-parameter-define ipm application ip-multicast hierarchical
    2. Configure a controlled-interface type.
      host1(config-qos-parameter-define)#controlled-interface-type vlan
      host1(config-qos-parameter-define)#exit
  3. Create a parameter instance that globally defines the value of the IP multicast adjustment as 0.
    host1(config)#qos-parameter ipm 0
  4. Reference the parameter within a scheduler profile parameter expression.
    host1(config)#scheduler-profile vlan-subscriber
    host1(config-scheduler-profile)#shared-shaping-rate 1000000 - ipm burst 50 milliseconds auto
    host1(config-scheduler-profile)#exit
  5. Add the scheduler profile to a QoS profile.
    host1(config)#qos-profile vlan-subscriber
    host1(config-qos-profile)#vlan queue traffic-class best-effort
    host1(config-qos-profile)#vlan queue traffic-class voice scheduler-profile 192k
    host1(config-qos-profile)#vlan node scheduler-profile vlan-subscriber
    host1(config-qos-profile)#exit
  6. Attach the parameter definition to a logical interface.
    host1(config)#interface gigabitEthernet 7/0
    host1(config-if)#encapsulation vlan
    host1(config-if)#exit
    host1(config)#interface gigabitEthernet 7/0.1
    host1(config-if)#vlan id 200
    host1(config-if)#qos-profile vlan-subscriber
    host1(config-if)#ip address 1.1.1.1 255.255.255.0

After the QoS profile is attached to the interface, the IP multicast bandwidth adjustment application begins to adjust rates based on IGMP joins and leaves received on that interface.

Published: 2009-10-07