Nokia Quality of Service

After completing the course, students should be able to:

• List the business drivers for QoS
• Describe traffic classification, queuing, scheduling, and marking as they pertain to QoS including, rate limiting, resource allocation, and congestion management
• Configure various QoS-related policies on the Nokia 7750 SR to provide differentiated services confirming to SLAs
• List the criteria that can be used to classify and mark packets at service and network ingress/egress to support optimal use of networking resources
• State the purpose of the queuing and scheduling parameters PIR, CIR, MBS, CBS, High Priority only, queue type, queue mode and adaptation rule
• State the purpose of Weighted Random Early Detection (WRED) to increase average utilization of networking resources as they approach congestion
• State the need for a multi-tiered scheduling (HQoS) architecture on SAP ingress and egress

• Apply QoS concepts to the applicable service (virtual private wire service [VPWS], virtual private LAN service [VPLS], virtual private routed network [VPRN], or Internet enhanced service [IES])
• Describe the need for egress port scheduling and its operation in conjunction with an HQoS scheduler
• Explain how standalone policers enforce the configured rate, CIR, MBS, CBS, and HPO to color packets
• Explain how Class Fair Hierarchical Policing (CFHP) supports four layers of hierarchy, and dynamically enforces rates, using the priority, and weights assigned to child policers and arbiters
• Design, configure, apply, and predict the expected behavior of a CFHP policy
• Explain Ethernet queue groups and how they are typically used on access ingress, access egress, network ingress, and network egress