ubuntu@compute2:~/devstack$ sudo ovs-vsctl show e3784497-dc8f-432d-9a2c-923148962c73 Bridge br-int fail_mode: secure Port "tap1b23acf8-e3" tag: 1 Interface "tap1b23acf8-e3" type: internal Port "int-br-em3" Interface "int-br-em3" type: patch options: {peer="phy-br-em3"} Port "qvodaececbe-e4" tag: 1 Interface "qvodaececbe-e4" Port "qvo6cb66782-f6" tag: 1 Interface "qvo6cb66782-f6" Port br-int Interface br-int type: internal Bridge "br-em3" Port "phy-br-em3" Interface "phy-br-em3" type: patch options: {peer="int-br-em3"} Port "br-em3" Interface "br-em3" type: internal Port "em3" Interface "em3" Bridge br-tun Port br-tun Interface br-tun type: internal Port patch-int Interface patch-int type: patch options: {peer=patch-tun} ovs_version: "2.0.2" ubuntu@compute2:~/devstack$ brctl show bridge name bridge id STP enabled interfaces qbr6cb66782-f6 8000.e2ebec324ad3 no qvb6cb66782-f6 tap6cb66782-f6 qbrdaececbe-e4 8000.7e131d039e25 no qvbdaececbe-e4 tapdaececbe-e4 virbr0 8000.000000000000 yes ubuntu@compute2:~/devstack$ sudo tcpdump -vvvenli qbr6cb66782-f6 port 67 tcpdump: WARNING: qbr6cb66782-f6: no IPv4 address assigned tcpdump: listening on qbr6cb66782-f6, link-type EN10MB (Ethernet), capture size 65535 bytes 13:14:38.467874 fa:16:3e:f5:21:6f > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 323: (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 309) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from fa:16:3e:f5:21:6f, length 281, xid 0x76ab9c20, Flags [none] (0x0000) Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Discover Client-ID Option 61, length 7: ether fa:16:3e:f5:21:6f MSZ Option 57, length 2: 576 Parameter-Request Option 55, length 8: Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname Domain-Name, BR, NTP, Classless-Static-Route Vendor-Class Option 60, length 12: "udhcp 1.20.1" END Option 255, length 0 13:14:38.468671 fa:16:3e:20:4f:82 > fa:16:3e:f5:21:6f, ethertype IPv4 (0x0800), length 370: (tos 0xc0, ttl 64, id 19949, offset 0, flags [none], proto UDP (17), length 356) 172.16.242.5.67 > 172.16.242.51.68: [udp sum ok] BOOTP/DHCP, Reply, length 328, xid 0x76ab9c20, Flags [none] (0x0000) Your-IP 172.16.242.51 Server-IP 172.16.242.5 Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 172.16.242.5 Lease-Time Option 51, length 4: 86400 RN Option 58, length 4: 43200 RB Option 59, length 4: 75600 Subnet-Mask Option 1, length 4: 255.255.255.0 BR Option 28, length 4: 172.16.242.255 Domain-Name Option 15, length 14: "openstacklocal" Hostname Option 12, length 18: "host-172-16-242-51" Default-Gateway Option 3, length 4: 172.16.242.1 Domain-Name-Server Option 6, length 4: 172.16.1.5 END Option 255, length 0 13:14:38.469980 fa:16:3e:f5:21:6f > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 335: (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 321) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from fa:16:3e:f5:21:6f, length 293, xid 0x76ab9c20, Flags [none] (0x0000) Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request Client-ID Option 61, length 7: ether fa:16:3e:f5:21:6f Requested-IP Option 50, length 4: 172.16.242.51 Server-ID Option 54, length 4: 172.16.242.5 MSZ Option 57, length 2: 576 Parameter-Request Option 55, length 8: Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname Domain-Name, BR, NTP, Classless-Static-Route Vendor-Class Option 60, length 12: "udhcp 1.20.1" END Option 255, length 0 13:14:38.470381 fa:16:3e:20:4f:82 > fa:16:3e:f5:21:6f, ethertype IPv4 (0x0800), length 370: (tos 0xc0, ttl 64, id 19950, offset 0, flags [none], proto UDP (17), length 356) 172.16.242.5.67 > 172.16.242.51.68: [bad udp cksum 0x3dbc -> 0xccf7!] BOOTP/DHCP, Reply, length 328, xid 0x76ab9c20, Flags [none] (0x0000) Your-IP 172.16.242.51 Server-IP 172.16.242.5 Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: ACK Server-ID Option 54, length 4: 172.16.242.5 Lease-Time Option 51, length 4: 86400 RN Option 58, length 4: 43200 RB Option 59, length 4: 75600 Subnet-Mask Option 1, length 4: 255.255.255.0 BR Option 28, length 4: 172.16.242.255 Domain-Name Option 15, length 14: "openstacklocal" Hostname Option 12, length 18: "host-172-16-242-51" Default-Gateway Option 3, length 4: 172.16.242.1 Domain-Name-Server Option 6, length 4: 172.16.1.5 END Option 255, length 0 13:15:38.533273 fa:16:3e:f5:21:6f > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 335: (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 321) 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from fa:16:3e:f5:21:6f, length 293, xid 0x76ab9c20, secs 60, Flags [none] (0x0000) Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Request Client-ID Option 61, length 7: ether fa:16:3e:f5:21:6f Requested-IP Option 50, length 4: 172.16.242.51 Server-ID Option 54, length 4: 172.16.242.5 MSZ Option 57, length 2: 576 Parameter-Request Option 55, length 8: Subnet-Mask, Default-Gateway, Domain-Name-Server, Hostname Domain-Name, BR, NTP, Classless-Static-Route Vendor-Class Option 60, length 12: "udhcp 1.20.1" END Option 255, length 0 13:15:38.534341 fa:16:3e:20:4f:82 > fa:16:3e:f5:21:6f, ethertype IPv4 (0x0800), length 370: (tos 0xc0, ttl 64, id 19951, offset 0, flags [none], proto UDP (17), length 356) 172.16.242.5.67 > 172.16.242.51.68: [udp sum ok] BOOTP/DHCP, Reply, length 328, xid 0x76ab9c20, secs 60, Flags [none] (0x0000) Your-IP 172.16.242.51 Server-IP 172.16.242.5 Client-Ethernet-Address fa:16:3e:f5:21:6f Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: ACK Server-ID Option 54, length 4: 172.16.242.5 Lease-Time Option 51, length 4: 86400 RN Option 58, length 4: 43200 RB Option 59, length 4: 75600 Subnet-Mask Option 1, length 4: 255.255.255.0 BR Option 28, length 4: 172.16.242.255 Domain-Name Option 15, length 14: "openstacklocal" Hostname Option 12, length 18: "host-172-16-242-51" Default-Gateway Option 3, length 4: 172.16.242.1 Domain-Name-Server Option 6, length 4: 172.16.1.5 END Option 255, length 0 ^C 6 packets captured 6 packets received by filter 0 packets dropped by kernel