CCNP Exam Prep Tips and Must Knows about Maintenance Methodologies


Things You’ll Need to Know about Maintenance Methodologies

Network Maintenance Methodology

  • Examples
  • IT Infrastructure Library (ITIL)
  • Telecommunications Management Network (TMN)
  • Cisco Lifecyle Services (PPDIOO)


  • Fault Management
  • Configuration Management
  • Accounting Management
  • Performance Management
  • Security Management

Common Maintenance Tasks

  • Adds, moves, and changes
  • Installation and configuration of new devices
  • Replacement of failed equipment
  • Configuration and creation of software backups
  • Network failure diagnosis and resolution
  • Software upgrades and patches
  • Network monitoring
  • Performance measurement and capacity planning
  • Writing and updating documentation

Benefits of Scheduled Maintenance

  • Reduces network downtime
  • Ensures that long-term maintenance tasks will not be neglected or forgotten
  • Results in predictable lead times for change requests
  • Allows disruptive maintenance tasks to be scheduled during assigned maintenance windows, reducing downtime during production hours

Change Control Procedures

  • Balance
    • Urgency
    • Necessity
    • Business benefits
  • Against
    • Risk
    • Impact
    • Resources

Important Factors in Network Maintenance Process

  • Up-to-date documentation
  • Teamwork and communication
  • Consistency
  • Disaster recovery
  • Network performance monitoring and measurement

Network Maintenance Tools, Applications, and Resources

  • Utilize Backup Servers for Router and Switch Configurations
  • Archive Configurations
    • Can be created locally on the device or on the network
  • Implement NTP
    • Used to synchronize the clocks of all network devices
  • Implement Logging Services
    • Routers and switches can log to various location
  • Online Resources
    • Cisco Dynamic Configuration Tool
    • Cisco Feature Navigator
    • SNMP Object Navigator
    • Cisco Power Calculator
  • Network Monitoring System
    • Continuously checks the availability and status of your network devices

Applying Troubleshooting Methodologies

Fundamental elements of diagnosing the nature and cause of a problem

  • Information gathering
  • Analysis
  • Elimination of problem
  • Proposing hypothesis
  • Testing

Common Troubleshooting Approaches

  • Top Down
  • Bottom Up
  • Divide and Conquer
  • Follow the Path
  • Spot the Difference
  • Move the Problem

Planning and Implementing Troubleshooting Procedures

  • Define the problem
  • Gather relevant information
  • Analyze the facts
  • Eliminate the possible causes
  • Propose a hypothesis
  • Test the hypothesis
  • Solve the problem

Integrating Troubleshooting into the Network Maintenance Process

  • Create a baseline
  • Communication during the planning and implementing troubleshooting procedures
  • Ask: Has anything changed recently?

Maintenance and Troubleshooting Tools

  • Define the problem
    • Network monitoring and even reporting
    • Logging system messages to Syslog
    • Event notification using SNMP
    • Event notification using Cisco IOS Embedded Event Manager (EEM)
  • Gather information
    • Incident-related information gathering
    • SPAN and RSPAN for traffic capturing
  • Analyze
    • Baseline creation and traffic accounting
    • Statistics gathering using SNMP
    • Traffic accounting using NetFlow
  • Test the hypothesis
    • Configuration rollback
    • Configuration replace and configuration rollback

Make sure you are familiar with:

  • Network maintenance methodology
  • Common maintenance tasks
  • Benefits of scheduled maintenance
  • Factors in network maintenance process
  • Configuration backup
  • Implementing NTP
  • Logging services
  • Fundamental elements of diagnosing the nature and cause of a problem
  • Common troubleshooting approaches
  • Planning and implementing troubleshooting procedures
  • Integrating troubleshooting into the network maintenance process
  • Maintenance and troubleshooting tools

Be able to:

  • Troubleshoot EIGRP
  • Troubleshoot eBGP
  • Troubleshoot routing redistribution solution
  • Troubleshoot a DHCP client and server solution
  • Troubleshoot NAT
  • Troubleshoot first hop redundancy protocols
  • Troubleshoot IPv6 routing
  • Troubleshoot IPv6 and IPv4 interoperability
  • Troubleshoot switch-to-switch connectivity for the VLAN-based solution
  • Troubleshoot loop prevention for the VLAN-based solution
  • Troubleshoot Access Ports for the VLAN-based solution
  • Troubleshoot private VLANs
  • Troubleshoot port security
  • Troubleshoot general switch security
  • Troubleshoot VACLs and PACLs
  • Troubleshoot switch virtual interfaces (SVIs)
  • Troubleshoot switch supervisor redundancy
  • Troubleshoot switch support of advanced services (i.e., wireless, VoIP, and video)
  • Troubleshoot a VoIP support solution
  • Troubleshoot a video support solution
  • Troubleshoot Layer 3 security
  • Troubleshoot issues related to ACLs used to secure access to Cisco routers
  • Troubleshoot configuration issues related to accessing the AAA server for authentication purposes
  • Troubleshoot security issues related to IOS services (i.e., finger, NTP, HTTP, FTP, RCP, etc.)

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