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Persistent13
Asked: 2016-09-22 13:59:09 +0800 CST

Hyper-V VM - Cannot Access Internet with DHCP but Can With Static

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EDIT: I dropped the default gateway from the DHCP server during a configuration change.

I have a 2016 TP5 VM on a 2016 TP5 Hyper-V host connected to a internal virtual switch, the VM acquires a IPv4 address via DHCP and can resolve and ping internal addresses and hostnames however any attempt to ping an external resource I get the error "PING: transmit failed. General failure." and by extension cannot reach any outside resource but I can access internal ones.

If I set the network interface with the exact same settings that are acquired by DHCP I have no issues, this is the only VM I am currently having the issue on.

I have tried removing and then adding the vNIC and rebooting the VM with no change to the issue.

What is going on?

ip hyper-v virtual-machines windows-server-2016

1 Answers

  1. There is not so much moving parts here: type of your network adapter, connectivity type assigned for VM and IP configuration are the main parts.

    • Are you sure static IP config is valid and complete (default gateway etc.)?
    • Are you sure there is no duplicate IPs in your network?
    • Are you sure that your VM adapater has default gateway specified?
    • Have you tried explicitly ping using IPv4 or IPv6?
    • Does ping 127.0.0.1 / ::1 works fine?

    See very similar question: https://superuser.com/questions/662105/no-internet-access-when-using-static-ip There root cause was missing default gateway.

    If I were you I would try to read VM's NIC and then try the same static IP config (providing it is valid one) - may well fix your issue too.

    Beyond that it could be something more obscure with more difficult fix. Example: https://thommck.wordpress.com/2010/11/04/fixing-a-failed-hyper-v-guest-network-adapter/

    General troubleshooting approach to "PING: Transmit failed. General Failure - Reasons and Solution" error: http://www.corenetworkz.com/2011/08/ping-transmit-failed-general-failure.html

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