CCNA 3.14: Troubleshoot basic Layer 3 end-to-end connectivity issues


Layer 3 issues include problems at the network layer with routed protocols as well as routing protocols


Study Notes:

  • Layer 3 network layer issues
  • Physical and Data link layers are working properly
  • Network connectivity issues
  • Possibly cannot ping
  • Incorrect IP or subnet mask settings
  • No gateway configured
  • Misconfigurations
  • Connectivity issues
  • Neighbor issues
  • Topology database incorrect or incomplete
  • Routing table incorrect or incomplete
  • Commands use to troubleshoot layer 3 connectivity issues include ping, traceroute and show



PacketTracer Lab: CCNA-3.14-Troubleshoot-basic-Layer-3-end-to-end-connectivity-issues.pkt

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  1. Craig Dupont
    Craig Dupont
    November 10, 2018 at 2:46 am

    Hello Joe, I’m not able to download the pkt Packet Tracer Lab. I keep getting error message :404: Sorry, file not found. Please contact Support for assistance.

    • Joe Barger (CCNP/CCDP)
      Joe Barger (CCNP/CCDP) • Post Author •
      November 12, 2018 at 12:51 am

      Craig, thanks for pointing it out. The lab should be accessible now.

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