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## Related Documentation

- IP Multicast Bandwidth Adjustment for QoS Overview
- Example: QoS Parameter Configuration for IP Multicast Bandwidth Adjustment
- controlled-interface-type
- encapsulation vlan
- interface gigabitEthernet
- node
- qos-parameter-define
- qos-profile
- queue
- scheduler-profile
- shared-shaping-rate
- traffic-class
- vlan id

# 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.

## Related Documentation

- IP Multicast Bandwidth Adjustment for QoS Overview
- Example: QoS Parameter Configuration for IP Multicast Bandwidth Adjustment
- controlled-interface-type
- encapsulation vlan
- interface gigabitEthernet
- node
- qos-parameter-define
- qos-profile
- queue
- scheduler-profile
- shared-shaping-rate
- traffic-class
- vlan id

#### Published: 2010-12-20

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