Metro-Ethernet Service and Troubleshooting Training Course


This 4 day coursework is intended for Telecom management and technology professionals who
have to maintain MetroEthernet services across the globe. The course introduces all the
prevailing standards, Troubleshooting guides, vendor options and evolving technologies in
Metro Ethernet domain.

Course Outline

Module-1 : What is Metro Ethernet?-Introduction

  • Architecture
  • Carrier Ethernet Terminology
  • The UNI, NNI, MEN, Ethernet Virtual Connections (EVCs)
    • EVCs and Services
    • E-Line Services
  • Ethernet Private Line, Ethernet Virtual Private Line
    • E-LAN Services
  • Multipoint Services
    • E-Tree Services
    • Service Attributes
  • Service Parameters, Bandwidth Profiles, Traffic Management
    • Circuit Emulation Services
    • Carrier Ethernet Architecture for Cable
    • Carrier Ethernet Class of Service
    • Service Examples

Module-2 : Architecture

  • EVC: Ethernet Virtual Connection
  • UNI: User Network Interface. The physical demarcation point between the responsibility of the Service Provider and the responsibility of the Subscriber
  • UNI-C: UNI customer-side processes
  • UNI-N UNI network-side processes
  • ENNI: External Network to Network Interface; the physical demarcation point between the responsibility of the two Service Providers
  • ENNI-N: ENNI Processes

Module-3: 3 layers- details

  • APP, ETH and TRAN – Application service, Ethenet Service and Transportation Service

Module-4 : Getting Familiar with Terminology

  • The User Network Interface (UNI)
  • Ethernet Virtual Connection (EVC)
    • Service container
    • Connects two or more subscriber sites (UNI’s)
    • An association of two or more UNIs
    • Prevents data transfer between sites that are not part of the same EVC
    • Three types of EVCs
  • Point-to- Point
  • Multipoint-to- Multipoint
  • Rooted Multipoint
    • Can be bundled or multiplexed on the same UNI
    • Defined in MEF 10.2 technical specification

Module -5 : Terminology- 2

  • UNI Type I
    • A UNI compliant with MEF 13
    • Manually Configurable
  • UNI Type II
    • Supports E-Tree
    • Support service OAM, link protection
    • Automatically Configurable via E-LMI
    • Manageable via OAM
  • Network to Network Interface (NNI)
    • Network to Network Interface between distinct MEN operated by one or more carriers
    • An active project of the MEF
  • Metro Ethernet Network (MEN)
    • An Ethernet transport network connecting user end-points (Expanded to Access and Global networks in addition to the original Metro Network meaning)

Module-6 & 7 ( 4 hours) : Service Type

  • E-Line Service Type for
    • Virtual Private Lines (EVPL)
    • Ethernet Private Lines (EPL)
    • Ethernet Internet Access
  • E-LAN Service Type for
    • Multipoint L2 VPNs
    • Transparent LAN Service
    • Multicast networks
  • E-Tree Service Type for
    • Rooted multi-point L2 VPNs
    • Broadcast networks
    • Telemetry networks
  • E- Access Service Type* for
    • Wholesale Access Services
    • Access EPL
    • Access EVPL

Module-8 : Service Attributes :

  • EVC Service Attributes (Defined in MEF 10.2)
    • Fundamentals of enabling the value of Carrier Ethernet:
      • Virtual Connections
      • Bandwidth profiles
      • Class of Service Identification
    • Service Performance
      • Frame Delay (Latency)
      • Inter Frame Delay Variation
      • Frame Loss Ratio
      • Availability
        • UNI Service Attributes
    • Details regarding the UNI including:
      • Physical interface capabilities
      • Service multiplexing capability
      • C-VLAN bundling capability

Module-9 : Bandwidth Profiles per EVC & per Class of Service : 6 Parameters

  • CIR (Committed Information Rate)
    • CIR defines assured bandwidth
    • Assured via bandwidth reservation, traffic engineering
  • EIR (Excess Information Rate)
    • EIR bandwidth is considered ‘excess’
    • EIR improves the network’s Goodput
    • Traffic dropped at congestion points in the network
  • CBS/EBS (Committed/Excess Burst Size in bytes)
    • Higher burst size results in improved performance

Color Mode (“Color Aware” or “Color Blind”)

  • Green – Forwarded frames – CIR conforming traffic
  • Yellow – Discard Eligible frames – Over CIR , within EIR
  • Red – Discarded frames – Exceeds EIR

Module-10 : Network and security administration :

  • Security issues in ETTx
  • ARP, ARP Spoofing
  • Spoofing prevention
  • ARP inspection
  • Dynamic Inspection
  • Port ACL
  • Policy based security controller

Module 11 : System maintenance activities : swapping modules, retrieveing and backup databases

  • EOAM
  • ITU-T 1731
  • Database management
  • Backup management
  • Data retrieval
  • Module management

Module- 12: preventive maintenance and corrective maintenance

  • Install and support Mobile Switching Centers (MSC) and Cellular Back- Haul (CBH) networks for 1200+ active cellular towers.
  • Understand and perform RFC-2544 and ITU-T Y.1564 circuit testing using network specific test equipment (.e.g. HST3000, T-BERD, FTB-860).
  • Troubleshoot and resolve network problems while complying with outlined service level agreements (SLA’s). Work synonymously with business class customers, customer’s IT staff, and enterprise NOC’s and XOC’s to quickly isolate and resolve any metro-E/CBH network issues.
  • Schedule and perform preventive maintenance during overnight maintenance windows to avoid or minimize impact to customer’s traffic and/or any other commercial or residential product that may be affected as a result of necessary maintenance.
  • Understand and work with multiple technologies within complex networks to minimize the downtime that could affect customers and maximize reliability. Perform general optical fiber maintenance utilizing fiber optic test equipment including: optical scope, CWDM Optical Time Domain Reflectometer (OTDR), and Optical Spectrum Analyzer (OSA).

Module-13 : RAMON ( Remote Network Monitoring ) Alarm and event management

Statistics (RMON group 1)— Ethernet statistics (including Fast Ethernet and Gigabit Ethernet
statistics, depending on the switch type and supported interfaces) on an interface.

  • History (RMON group 2—Collects a history group of statistics on Ethernet ports (including Fast Ethernet and Gigabit Ethernet statistics, depending on the switch type and supported interfaces) for a specified polling interval.
  • Alarm (RMON group 3)— management information base (MIB) object for a specified interval, alarm at a specified value (rising threshold), and resets the alarm at another value (falling threshold). Alarms with events; the alarm triggers an event, which can generate a log entry or an SNMP trap.
  • Event (RMON group 9)—Specifies the action to take when an event is triggered by an alarm. The action can be to generate a log entry or an SNMP trap.
  • CLI & SNMP

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