Only to increase the details? With tcpdump on ovirt node it seems that DHCP is pass by interfaces [root@srv-virt8 ~]# tcpdump -i any -pvn port 67 and port 68 tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes 16:16:52.605855 ethertype IPv4, IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 172.20.0.254.bootps > 172.20.0.228.bootpc: BOOTP/DHCP, Reply, length 300, xid 0x2f8f346e, Flags [none] Your-IP 172.20.0.228 Client-Ethernet-Address 56:6f:a5:6a:00:06 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 172.20.0.254 Lease-Time Option 51, length 4: 7200 Subnet-Mask Option 1, length 4: 255.255.255.0 Default-Gateway Option 3, length 4: 172.20.0.254 Domain-Name Option 15, length 19: "mydomain.com" Domain-Name-Server Option 6, length 4: 172.20.0.254 16:16:52.605855 ethertype IPv4, IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 172.20.0.254.bootps > 172.20.0.228.bootpc: BOOTP/DHCP, Reply, length 300, xid 0x2f8f346e, Flags [none] Your-IP 172.20.0.228 Client-Ethernet-Address 56:6f:a5:6a:00:06 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 172.20.0.254 Lease-Time Option 51, length 4: 7200 Subnet-Mask Option 1, length 4: 255.255.255.0 Default-Gateway Option 3, length 4: 172.20.0.254 Domain-Name Option 15, length 19: "mydomain.com" Domain-Name-Server Option 6, length 4: 172.20.0.254 16:16:52.605855 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) 172.20.0.254.bootps > 172.20.0.228.bootpc: BOOTP/DHCP, Reply, length 300, xid 0x2f8f346e, Flags [none] Your-IP 172.20.0.228 Client-Ethernet-Address 56:6f:a5:6a:00:06 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 172.20.0.254 Lease-Time Option 51, length 4: 7200 Subnet-Mask Option 1, length 4: 255.255.255.0 Default-Gateway Option 3, length 4: 172.20.0.254 Domain-Name Option 15, length 19: "mydomain.com" Domain-Name-Server Option 6, length 4: 172.20.0.254