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No DCHPOFFERS received

Host networt was changed to use bond0 as vmbr0 interface. Now problems appears - guest cannot obtain IP address: 

dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 7
dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 14
dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 10
dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 10
dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 19
dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 1
dhclient[478]: No DHCPOFFERS received.

tcpdumping- on vmbr0 and guest tap interface shows that DHCP server replies with offer, but offer is not forwarded into guest. When guest is set to use static IP, everything works smoothly.