Configuring Multicast Qos Adjustment; Multicast Oif Mapping Case - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

JUNOSe 11.0.x Multicast Routing Configuration Guide
For additional information about configuring QoS adjustment, see "Configuring
Multicast QoS Adjustment" on page 158.
For additional information about configuring interface- and port-level admission
control, see "Blocking and Limiting Multicast Traffic" on page 168.
For additional information about creating route maps, see Configuring Routing Policy
in the JUNOSe IP Services Configuration Guide .

Configuring Multicast QoS Adjustment

When the router uses multicast OIF mapping, any multicast streams that a subscriber
receives bypass any configured QoS treatment for that subscriber interface. The
Multicast QoS adjust feature provides a way in which the router can account for this
multicast traffic.
NOTE: For additional information about how to configure OIF mapping, see
"Configuring Group Outgoing Interface Mapping" on page 53.
The following sections provide two possible configuration cases for using multicast
QoS adjustment.
NOTE: For additional information about QoS adjustment, see Parameter Definition
Attributes for QoS Administrators Overview .

Multicast OIF Mapping Case

Multicast OIF mapping enables the router to decrease the inefficiencies associated
with replicating streams of multicast traffic. Using OIF maps, MLD joins that the
router receives on a subscriber interface can be mapped to a special interface for
forwarding. This special interface can be on a different physical port or line module
from that of the join interface.
Using this mapping function, the router can send a single copy of each multicast
stream over the special interface and the access nodes are configured to perform
any final replication to the subscribers and merge unicast and multicast data flows
onto the subscriber interfaces as necessary. See Figure 15 on page 159.
158
Configuring Multicast QoS Adjustment