Many information technology (IT) professionals would agree that the highest level of skill an IT professional can display is in the area of troubleshooting. When things go wrong on a network, the entire organization is looking to you to fix it and fix it quickly.
Provide a discussion of 3–5 paragraphs in your own words of what techniques you find as being most useful for troubleshooting virtual local area networks (VLANs) and trunking problems. In your posting, be sure to discuss commands that you would use on this kind of interface. Please post an answer to the following questions. Also, support your answers with academic or real IT examples to accentuate your point. Also, you must provide at least 2 feedback posts to one of your classmates.
What represents an effective troubleshooting routine for switches?
What elements of switch operation need to be checked to implement troubleshooting?
What tools can assist with switch troubleshooting?
Reference
Cisco. (n.d.). Cisco IOS technologies. Retrieved from http://www.cisco.com/c/en/us/products/ios-nx-os-software/ios-technologies/index.html
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Computer Science: Troubleshooting
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Techniques that are most useful for Troubleshooting Virtual Local Area Networks (VLANs) and Trunking Problems
VLANs are a grouping of ports that employ switches with logic inside to ensure that traffic from a group of ports is not send to other group of ports. On the other hand, trunking is a mechanism that allows multiple virtual area networks (VLANs) to function independently across several switches (Cisco, 2017). The most common VLANs include incorrect internet protocol (IP) addresses and missing VLANs, while the most common trunking problems are native VLAN mismatch, trunk mode mismatch and allowed VLANs on trunks.
Every VLAN should correspond to a unique IP subnet (Cisco Academy, 2017). When two devices in the same VLAN have different IP subnet, they cannot communicate. This is a common problem with the VLANs and can be solved through correct configuration and changing the subnet address to the correct one. Sometimes no connection is established even with correct IP addresses. This may signal missing VLANs. In such a case, the show vlancommand can be used to check whether the port belongs to an expected VLAN. If a port is found to be assigned to wrong VLAN, the command switchport access vlan can be used to assign the correct VLAN. The common trunk problems include links incorrectly behaving as trunk
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