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#1 2020-01-18 08:51:37

Route180Plus
Member
Registered: 2020-01-18
Posts: 1

Libvirt MacVTap networking now broken unless allmulticast manually set

MacVTap networking, which previously just a few weeks ago worked fine, suddenly longer does unless I manually set allmulticast on the macvtap interface with:

ip link set macvtap0 allmulticast on

This (or setting it to promiscuous) is the only way I've been able to make it work, allmulticast is not normally set on a libvirt macvtap interface (manually or automatically), so I'm not sure why it's now suddenly required.

This was also tested on a fresh arch install with default configuration and nothing but libvirt + virt-manager + qemu installed, with the same results.

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