Junos Class of Service (JCOS) – Outline

Detailed Course Outline

Class-of-Service Overview
  • Discuss the history and evolution of CoS
  • Define the characteristics of CoS and Differentiated Services
  • Identify the CoS fields in packet headers
  • Discuss the processing of CoS on Junos platforms
Packet Classification
  • Discuss classification overview
  • Identify forwarding classes and packet loss priority
  • Configure fixed classification
  • Configure multifield classification
  • Configure behavior aggregate classification

Lab 1: Configuring Packet Classification

Policing
  • Review policing
  • Configure a single-rate two-color-policer
  • Configure tricolor marking policers
  • Configure hierarchical policers
Interface and Firewall Applications
  • Configure an interface application
  • Configure a firewall application

Lab 2: Configuring Policers

Scheduling
  • Describe scheduling components
  • Describe transmission rate
  • Describe queue priority
  • Describe delay buffers
  • Describe drop profiles
  • Configure scheduling components

Lab 3: Configuring Schedulers

Hierarchical Scheduling
  • Describe the components of hierarchical scheduling
  • Configure hierarchical scheduling

Lab 4: Configuring Hierarchical Schedulers

Rewrite Rules
  • Identify the purpose of rewriting packet headers
  • Configure and apply default and custom rewrite rules

Lab 5: Configuring rewrite rules

CoS-Based Forwarding
  • Identify the purpose of CoS-based forwarding
  • Configure CoS-based forwarding

Lab 6: Configuring Class Based Forwarding

CoS VoIP Case Study
  • Review the case study
  • Configure the ingress node
  • Configure the transit and egress nodes
Congestion Control in Machine Learning Networks
  • Describe IP services for congestion avoidance
  • Configure a lossless IP fabric for RoCEv2 traffic
  • Validate congestion avoidance parameters