Question

A service provider offers a business-grade Ethernet service to a customer whose CE connects at 1 Gbps physically, but the customer purchased only a 300 Mbps subscription tier. Within that 300 Mbps, voice traffic must receive strict low-latency treatment while remaining data classes share the leftover bandwidth proportionally. On the PE egress interface toward the customer, which QoS mechanism correctly enforces this design?

Accepted Answer

A hierarchical QoS policy where a parent policy shapes to 300 Mbps and a child policy provides priority for voice and bandwidth allocation for data classes

Answer

A single flat policy-map applying priority to voice and bandwidth to data classes, attached directly to the physical interface

Answer

A parent policing policy dropping all traffic above 300 Mbps with a child policy marking voice with EF

Answer

A per-class shaper on each traffic class summing to 300 Mbps, applied directly to the physical interface