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TROUBLESHOOTING OVERVIEW
• A form of problem solving, often
applied to repair failed products or
processes on a system
• Logical, systematic search for the
source of a problem in order to
solve it, and make the product or
process operational again
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TROUBLESHOOTING STEPS
1- Identify the problem
2- Isolate the problem
3- Implement a correct action and fix it
End users are your best friend !
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TROUBLESHOOTING COMMANDS
• Ping
• Traceroute
• SSH
• Show Mac Address-Table
• Show IP Interface Brief
• Show IP Route
• Show Running-Config
• Debug Commands
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TROUBLESHOOTING TOOLS
• Software : Softwares that are used to
determine the problems in network
(NMS Tools, Protocol Analyzers
(i.e. Wireshark) )
• Hardware : Hardwares that are
used to determine the problems in
network ( Cable testers, multimeters
etc.
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STEP BY STEP IP CONNECTIVITY TSHOOT
1. Check Layer-1 for errors or up / down states
2. Check Duplex Mismatches
3. Check MAC addresses
4. Check IP addresses
5. Check ARP tables
6. Check ports
7. Check ACLs
8. Check DNS
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SPAN OVERVIEW
• Switched Port Analyzer
• Cisco IOS tool used for troubleshooting
• Feature of the Cisco Catalyst series
switches that extends the monitoring
capabilities of existing network
analyzers into a switched ethernet
environment
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SPAN OVERVIEW
• Mirrors the traffic at one switched
segment onto a predefined SPAN
port
• A network analyzer attached to the
SPAN port can monitor traffic from
any of the other Catalyst switch
ports
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SPAN TYPES
• Local SPAN : Mirrors traffic
between interfaces on the same
switch
• Remote SPAN : Allows to monitor
traffic from source ports distributed
over multiple switches
• Encapsulated Remote SPAN : Out
of our scope… • Remote SPAN (RSPAN)
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CONFIGURING LOCAL SPAN
• Configuration verified via "#show monitor" command
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IP SLA OVERVIEW
• Internet Protocol Service Level Agreement
• Cisco proprietary
• IOS feature that allows to collect
information (i.e. response time, latency,
jitter and packet loss) about network
performance in real time
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BONUS SLIDE ( PROMOTION OFFER! )
• To get our CCNA 200-125 Full Video Training with %90 discount
click the link below now !
CCNA 200-125 VIDEO TRAINING (GET WITH %90 DISCOUNT)
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