Re: [libvirt] KVM doesn't send an arp announce after live migrating a domain

> So it looks like the default config uses the kernel default? If libvirt > uses an existing bridge I agree it shouldn't hack it, but if it creates > its own can't it use a sensible default? That is the NAT virtual network. That one *does* default to a forward delay of 0, but since it is NAT, it is fairly useless for migration in anycase. If you do 'virsh net-dumpxml default' you should see that delay='0' was added The OP was using bridging rather than NAT though, so this XML example doesn't apply. My comments about libvirt not overriding kenrel policy for forward delay were WRT full bridging mode, not the NAT mode[1]