Subscriber Services: CoS for BNG on pseudowire service interface over active-active RLT interface

Junos OS introduced CoS support for a BNG on subscriber-interface on pseudowire over an active-active redundant logical tunnel (RLT) interface for subscriber applications such as DHCP and PPPoE. This CoS property is achieved by providing the scheduling nodes for the logical tunnel links. For dynamic interfaces, interface sets, static underlying interfaces, and dynamic underlying interfaces over RLT, CoS allocates scheduling nodes for each link in the RLT, which has multiple logical tunnel links in active-active mode. In case of targeted interfaces and targeted interface sets, which have primary and backup links, CoS allocates scheduling nodes on the primary and backup links to optimize the use of scheduling nodes. Traffic for the subscriber targeted interfaces will be distributed to all the primary LT links when CoS is applied at the subscriber level. When you enable targeting in a node, you must enable targeting for all the child nodes for CoS to function properly. Also, you must configure the network-services enhanced-ip at the [edit chassis] hierarchy level because this feature works only in enhanced IP mode.