Fedora 27: Virtualized in Hyper-V, the network adapter is not appearing to the OS.

asked 2017-12-14 14:13:02 -0500

ppringle gravatar image

I have a Fedora 27 Workstation installation in a Hyper-V hypervisor. The VM has a Network Adapter added.

This network adapter is not showing up in the system, even though it was before (yesterday). I have no idea why this has happened. No changes have happened to the VM itself except that I've restarted the host and installed typical Windows Updates.

Example output:

# nmcli c
ToLAN-bridge <uuid>  bridge  ToLAN-bridge
ToLAN-ether <uuid>  802-3-ethernet  --
httpd-LAN-veth <uuid>  802-3-ethernet  --
mysqld-LAN-veth <uuid>  802-3-ethernet  --

# nmcli d
ToLAN-bridge  bridge  connected  ToLAN-bridge
lo             loopback         unmanaged        --

# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ToLAN-bridge: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether <MAC Address>  ff:ff:ff:ff:ff:ff
    inet brd scope global ToLAN-bridge
       valid_lft forever preferred_lft forever

I've tried removing and re-adding the Network Adapter in Hyper-V.

I'm not sure how to troubleshoot a network adapter not showing up like this. I can't find anything in the message buffer of the kernel about this (dmesg).

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So, dropping back to Kernel version 4.13.16 from 4.13.3 fixes this issue. How very odd.

ppringle gravatar imageppringle ( 2017-12-18 09:24:52 -0500 )edit