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Maintenance models and maintenance methods:

Network maintenance mode

1. Fault-driven network maintenance

2. Structured network maintenance

Network maintenance methods:

1. ITIL:ITIL (IT Infrastructure Library IT Infrastructure Library): the IT services management framework defines a set of IT management best practices that can provide high-quality services to meet business objectives.

2. FCAPS: the FCAPS defined by ISO divides network management tasks into the following categories

1. Fault management

2. Configuration failure

3. Bookkeeping management

4. Performance management

5. Safety management

3. TMN:ITU-T integrates and redefines TMN (Telecommunications Management Network, telecom management network) based on FCAPS. TMN is a conceptual telecom network management framework. It is required to establish a management network for multipoint interconnection with the telecommunications network to complete manual or automatic maintenance tasks.

4. Cisco Lifecycle Services (Lifecycle Services): the Cisco Lifecycle Service maintenance model clearly defines the various stages of the Cisco technology lifecycle in the network. Network maintenance is generally regarded as the operation and optimization phase of the whole life cycle.

If an enterprise chooses the FCAPS model, it is necessary to complete the following five main management tasks

1. Management

2. Configuration management

3. Bookkeeping management

4. Performance management

5. Safety management

Maintenance process and maintenance process:

1. Identify basic network maintenance tasks

2. Acknowledge and describe the benefits of planned maintenance

3. Evaluate the key determinants that affect the change management process to create a process that meets the needs of the enterprise

4. Describe the basic elements and functions of network documents.

5. Make an effective disaster recovery plan

6. Describe the importance of network monitoring and performance measurement as an integral part of active network maintenance strategy.

Identify network maintenance tasks:

1. Provide add, move and change operations

2. Install and configure new equipment

3. Replace faulty equipment

4. Backup device configuration and software

5. Detect and troubleshoot link and equipment failures

6. Software upgrade or patch

7. Network monitoring

8. Performance measurement and capacity planning

9. Prepare and update network documents

Network maintenance planning:

1. Make a maintenance plan

2. Develop the change control process.

3. Establish the process of network documentation.

4. Establish an effective communication mechanism

5. Define modules / processes / conventions

6. Make a disaster recovery plan

Logging service

(0) Emergency (Emergencies)

(1) Alert (Alerts)

(2) critical (Critical)

(3) error (Errors)

(4) alarm (Warnings)

(5) notice (Notifications)

(6) report (Informational)

(7) debugging (Debugging)

Test network performance

1. Capacity planning

2. Diagnosing performance faults

3. SLA compliance measurement

Cisco Ststems provides a lot of WEB-based network maintenance tools

1. Dynamic configuration tool (Dynamic Configuration Tool): this tool can help you create a hardware configuration and verify the compatibility of the hardware with the selected software. In addition, it will provide a complete BOM (Bill Of Materials, Bill of Materials) listing all the necessary part numbers.

2. Cisco feature Navigation (Cisco Feature Navigator): this tool can quickly find the Cisco IOS software version of the features you want to run on the network.

3. SNMP object Navigation (SNMP Object Navigator): this tool translates SNMP OID into object names. In addition, you can download SNMP MIB (Management Information Base) files and verify the MIB supported by specific Cisco software versions.

4. Cisco Power Calculator (Cisco Power Calculator) +

Main steps of troubleshooting:

1. Collect information

2. Analyze the information

3. Eliminate the potential causes of the failure.

4. Verify inference

Troubleshooting methods:

1. Top-down

2. From the bottom up

3. Divide and rule

4. Track the traffic path

5. Comparative configuration

6. Component replacement

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