A network engineer is tasked with supporting traffic discrimination over MPLS traffic engineering tunnels. To allocate restricted bandwidth to a certain type of traffic with no QoS degradation…

Integrated Services (IntServ) is a resource reservation model (RSVP) which is typically not scalable for large-scale DiffServ traffic discrimination across an MPLS TE backbone.

The MPLS TE Diff-Serv full allocation model uses separate tunnels for each class, which can lead to inefficient bandwidth utilization due to static, unshared reservations, potentially not optimizing restricted bandwidth use.

The MPLS TE Diff-Serv Russian Doll model uses a single TE tunnel to carry multiple DiffServ classes, allowing for flexible bandwidth sharing while ensuring that higher-priority traffic classes receive their guaranteed bandwidth and experience no QoS degradation by nesting resource allocation.

IP Precedence is a basic IP QoS marking mechanism and does not provide the sophisticated bandwidth allocation and traffic engineering capabilities required for this scenario.

Class of Service (CoS) is a general QoS concept and not a specific technique for allocating restricted bandwidth and preventing QoS degradation within MPLS TE tunnels.