GNS3 – Windows 10 (Host Cannot Communicate with IOS Router) RRS feed

  • Question

  • *Note* I've already asked this on the vendor forums (Cisco and GNS3) with no solution.

    Here is one that’s been bugging me for ages, I’ve got a 2691 IOS router running in the latest version of GNS3 (1.4.6 as of today) and the latest version of W10 Pro. The router is bound to a cloud which is then connected to an interface on the host with full access to the LAN the host is on. Here is my problem, so I can ping all devices including the GW and receiving a response back from the IOS router except the host W10 machine that is running dynamips, and as well the host cannot ping the IOS router.

    So here is what I’ve done:

    Disable Windows Firewall.

    Disabled A/V.

    Posted on GNS3 Jungle with no reply for weeks (obviously something to do with W10 then).

    Used a loopback adapter instead but no change (can’t even ping anything on the LAN then even with the loopback configured with the LAN IP specifics).

    Re-installed GNS3.

    Disabled TCP/UDP checksum offloading.

    Ran a PCAP on the device, I’ve noticed that if I ping the IOS device then no reply is received and only requests are sent and if I then try ping from the IOS device I can see both request/reply but no notice on the IOS router. So the issue is it’s being dropped once sending from the host.

    Saturday, June 4, 2016 4:37 PM


  • Answer described here:


    • Marked as answer by Ben Lavender Friday, June 17, 2016 3:50 PM
    Friday, June 17, 2016 3:50 PM

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