The correct statement is that the egress port scheduler can have up to 17 children spread across 8 levels. This specifies the hierarchical structure and capacity of the egress port scheduler, which is a defining characteristic of its operation. The other options discuss configurations that are not accurate regarding the capabilities or functional organization of the egress port scheduler as described.

To implement Hierarchical-QoS (Multi-tiered scheduling), the following steps must be undertaken: First, a scheduler-policy must be configured as it defines how scheduling will be handled across different tiers. Second, the network queue policy must be configured to make use of the scheduler-policy, ensuring that queues are properly managed according to the policy. Finally, the scheduler-policy must be referenced in the SAP-ingress and SAP-egress policies to ensure they can make use of the hierarchical schedulers. These actions properly integrate Hierarchical-QoS configurations within the system.

Building a QoS-enabled network involves certain policies and procedures to ensure quality of service for traffic across the network. First, packets entering a node will be treated according to the local hop's configured policy to ensure that the local network conditions and policies are adhered to (C). Second, native IP packets entering a network port will not be marked at the first network egress by default (E), since marking typically happens at ingress points or might be deferred to specific points within the network as per the overall QoS strategy.

When the ToS-marking-state is set to trusted, packets arriving on the network interface are generally considered to be appropriately marked and do not typically require remarking. However, this behavior can change when the network's egress policy enables remarking. In such a configuration, native IP packets are usually not remarked because they are already trusted, so option A is correct. For packets associated with specific services, such as VPRN or ES services, they may be subject to different policies. Packets associated with a VPRN service on an upstream node will be trusted and not remarked, making option C correct. Meanwhile, packets associated with an ES service on an upstream node will be remarked if remarking is specifically enabled for these services, which makes option D correct.

On the Alcatel-Lucent 7750 SR, there are 8 queues per forwarding class (FC) available for multipoint traffic within a Virtual Private LAN Service (VPLS) on service ingress. This configuration supports effective traffic management and prioritization.