BNG support for cascading DSLAM deployments over bonded DSL channels

Passive Optical Network (PON) access technologies are supported with four levels of quality-of-service (QoS) scheduler hierarchy for residential subscribers in a BBE deployment. This feature extends the Access Node Control Protocol (ANCP) implementation to handle network configuration for residential customers that use PON as the broadband access technology for both CuTTB and FTTB. ANCP uses a statically controlled traffic-control profile on the interface-set for shaping at the subscriber level at the intermediate node to which the subscribers are connected. New DSL types are provided to support access line rate adjustment for the new access technologies. A new RADIUS VSA, inner-tag-protocol-id 26-211 is introduced to fetch the inner VLAN Tag Protocol Identifier value for L2BSA subscribers to enable maintaining one dynamic profile instead of two separate dynamic profiles. A new Junos OS dynamic profile variable $junos-inner-vlan-tag-protocol-id allows a VLAN map's inner-tag-protocol-id to be set by RADIUS or a predefined default value provided in the configuration.