Troubleshoot Limited Connectivity


  • In Windows, a limited connectivity message specifically means that the host can establish a physical connection to the network but has not received a lease for an IP configuration from a DHCP server
    • host will be configured with an address in the automatic private IP addressing (APIPA) 169.254.x.y range
    • Linux host might also use APIPA, set the IP address to unknown (0.0.0.0), or just leave IP unconfigured
  • Steps
    • Establish the scope of the issue
      • If the issue affects multiple users, the problem is likely to be the DHCP server itself
        • DHCP leases take time to expire, so a problem with the DHCP server might take a few hours to manifest as different clients try to renew their leases over time
        • DHCP server could be offline
        • could have run out of available leases
        • forwarding between the server and clients could be improperly configured
    • Check the configuration of patch cords
      • Verify that the wall port is connected to an appropriate port on a switch via the patch panel
      • If the computer is not connected to an appropriate switch port,
        • it is unlikely to connect to the expected services, such as its default gateway, DHCP, and DNS
    • Check the VLAN configuration
      • If the switch port is not configured with the correct VLAN ID, it can have the same effect as connecting the host to the wrong switch port
  • Windows may also report that a network adapter has no Internet access
    • means that the adapter has obtained an IP configuration (or is configured statically) but cannot reach msftncsi.com to download a test file
      • indicates that there is an issue with either Internet access at the gateway router or name resolution
      • On a SOHO network, access the router management interface and verify the Internet connection via a status update page
        • if the link is down, contact your ISP
        • router may also have tools to test connectivity
        • Verify that it can connect to the servers configured for DNS