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By Tekno Budi
June 27th, 2016
Diagnosis is the process of identifying
the nature and cause of a problem.
Gathering information
Analyzing information
...
1. The top-down approach
2. The bottom-up approach
3. The divide-and-conquer
approach
4. The follow-the-path approach
5. T...
• The goal of the top-down
approach is to find the highest
OSI layer that is still working.
• You need to have access to t...
• The physical layer as the starting
point and work layer by layer up
toward the application layer
• In large networks,
tr...
• To start from the network layer with
tests ping and trace
• If ping is successful, then start a
bottom-up approach from ...
• First discovers the actual
traffic path all the way from
source to destination
• To eliminate the links and
devices that...
• Spotting-the-differences approach by
comparing configurations, software
versions, hardware, or other device
properties b...
• Physically swap components and
observe whether the problem stays in
place, moves with the component, or
disappears entir...
 Troubleshooting Methods for Cisco IP
Networks, By Amir Ranjbar.
http://www.ciscopress.com/articles/article.as
p?p=227307...
Troubleshooting Methods for IP Networks
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Troubleshooting Methods for IP Networks

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Troubleshooting process and approaches for IP Networks

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Troubleshooting Methods for IP Networks

  1. 1. By Tekno Budi June 27th, 2016
  2. 2. Diagnosis is the process of identifying the nature and cause of a problem. Gathering information Analyzing information Eliminating possible causes Formulating a hypothesis Testing the hypothesis Solving the problem
  3. 3. 1. The top-down approach 2. The bottom-up approach 3. The divide-and-conquer approach 4. The follow-the-path approach 5. The spot-the-differences approach 6. The move-the-problem approach
  4. 4. • The goal of the top-down approach is to find the highest OSI layer that is still working. • You need to have access to the client’s application layer software to initiate the troubleshooting process
  5. 5. • The physical layer as the starting point and work layer by layer up toward the application layer • In large networks, troubleshooting can be a time- consuming process
  6. 6. • To start from the network layer with tests ping and trace • If ping is successful, then start a bottom-up approach from the network layer. • If ping is not successful, then start a top-down approach from the network layer.
  7. 7. • First discovers the actual traffic path all the way from source to destination • To eliminate the links and devices that are irrelevant
  8. 8. • Spotting-the-differences approach by comparing configurations, software versions, hardware, or other device properties between working and nonworking situations • To resolve the problem by changing the nonoperational elements to be consistent with the working ones
  9. 9. • Physically swap components and observe whether the problem stays in place, moves with the component, or disappears entirely • To isolate the problem and scope it to a single element, and focus further troubleshooting on that element
  10. 10.  Troubleshooting Methods for Cisco IP Networks, By Amir Ranjbar. http://www.ciscopress.com/articles/article.as p?p=2273070&seqNum=2  https://www.cisco.com/en/US/docs/internet working/troubleshooting/guide/tr1907.pdf

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