Open Stack

hi all:

I set up quantum without namespace support, now VMs can ping
gateway(100.0.0.1) but I can not capture any packet at gateway interface,
br-int or br-tun:

root at controller:/var/log/openvswitch# tcpdump -i qr-c5496165-c7 -nn
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on qr-c5496165-c7, link-type EN10MB (Ethernet), capture size
65535 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel

root at controller:/var/log/openvswitch# tcpdump -i br-int -nn
tcpdump: WARNING: br-int: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on br-int, link-type EN10MB (Ethernet), capture size 65535 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel

root at controller:/var/log/openvswitch# tcpdump -i br-tun -nn
tcpdump: WARNING: br-tun: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on br-tun, link-type EN10MB (Ethernet), capture size 65535 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel


When I ping the DHCP server, packets are captured at DHCP server interface,
but not at  br-int or br-tun:

root at controller:/var/log/openvswitch# tcpdump -i tap160480aa-84 -nn
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap160480aa-84, link-type EN10MB (Ethernet), capture size
65535 bytes
09:41:58.922771 IP 100.0.0.4 > 100.0.0.3: ICMP echo request, id 62726, seq
26, length 64
09:41:58.922885 IP 100.0.0.3 > 100.0.0.4: ICMP echo reply, id 62726, seq
26, length 64


It is strange, 1) why packet is captured at DHCP server interface, not at
gateway interface, 2) why  packet is not captured at br-int or br-tun(GRE
packets are captured at eth2)?

root at controller:/var/log/openvswitch# tcpdump -i eth2 proto gre -nn
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes
09:50:06.430375 IP 30.0.0.11 > 30.0.0.1: GREv0, key=0x2, length 110: IP
100.0.0.4 > 100.0.0.1: ICMP echo request, id 64774, seq 2, length 64
09:50:06.430452 IP 30.0.0.1 > 30.0.0.11: GREv0, key=0x2, length 110: IP
100.0.0.1 > 100.0.0.4: ICMP echo reply, id 64774, seq 2, length 64
09:50:07.430514 IP 30.0.0.11 > 30.0.0.1: GREv0, key=0x2, length 110: IP
100.0.0.4 > 100.0.0.1: ICMP echo request, id 64774, seq 3, length 64
09:50:07.430616 IP 30.0.0.1 > 30.0.0.11: GREv0, key=0x2, length 110: IP
100.0.0.1 > 100.0.0.4: ICMP echo reply, id 64774, seq 3, length 64








ca3b3f14-7564-4a88-b0f2-417ccc6d60bf
    Bridge br-tun
        Port "gre-2"
            Interface "gre-2"
                type: gre
                options: {in_key=flow, out_key=flow, remote_ip="30.0.0.11"}
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
        Port br-tun
            Interface br-tun
                type: internal
    Bridge "virbr0"
        Port "virbr0"
            Interface "virbr0"
                type: internal
    Bridge br-int
        Controller "tcp:30.0.0.1:6633"
        Port "qr-c5496165-c7"
            tag: 3
            Interface "qr-c5496165-c7"
                type: internal
        Port br-int
            Interface br-int
                type: internal
        Port "tapaebb6140-31"
            tag: 4095
            Interface "tapaebb6140-31"
                type: internal
        Port "tap5b5891ac-94"
            tag: 2
            Interface "tap5b5891ac-94"
                type: internal
        Port "tap160480aa-84"
            tag: 3
            Interface "tap160480aa-84"
                type: internal
        Port "qr-48c69382-4f"
            tag: 2
            Interface "qr-48c69382-4f"
                type: internal
        Port "tapf6040ba0-b5"
            tag: 4095
            Interface "tapf6040ba0-b5"
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port "tap09a002af-66"
            tag: 4095
            Interface "tap09a002af-66"
                type: internal
        Port "tapddc3ce63-2b"
            tag: 4095
            Interface "tapddc3ce63-2b"
                type: internal
        Port "tap0ded1c0f-df"
            tag: 1
            Interface "tap0ded1c0f-df"
                type: internal
        Port "qr-9b9a3229-19"
            tag: 4095
            Interface "qr-9b9a3229-19"
                type: internal
        Port "qr-8af2e01f-bb"
            tag: 4095
            Interface "qr-8af2e01f-bb"
                type: internal
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
        Port "qg-0eda5152-09"
            Interface "qg-0eda5152-09"
                type: internal
        Port "eth0"
            Interface "eth0"
    ovs_version: "1.4.0+build0"


root at controller:~# ifconfig
br-ex     Link encap:Ethernet  HWaddr e0:db:55:1f:99:b4
          inet addr:192.168.19.1  Bcast:192.168.19.255  Mask:255.255.255.0
          inet6 addr: fe80::e2db:55ff:fe1f:99b4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:329437 errors:0 dropped:0 overruns:0 frame:0
          TX packets:349843 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:50084384 (50.0 MB)  TX bytes:174803790 (174.8 MB)

br-int    Link encap:Ethernet  HWaddr e2:ed:9e:9b:69:42
          inet6 addr: fe80::e0ed:9eff:fe9b:6942/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1226 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:225034 (225.0 KB)  TX bytes:468 (468.0 B)

br-tun    Link encap:Ethernet  HWaddr 46:ca:bf:10:0e:45
          inet6 addr: fe80::44ca:bfff:fe10:e45/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:88 (88.0 B)  TX bytes:468 (468.0 B)

eth0      Link encap:Ethernet  HWaddr e0:db:55:1f:99:b4
          inet6 addr: fe80::e2db:55ff:fe1f:99b4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:366810 errors:0 dropped:0 overruns:0 frame:0
          TX packets:401198 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:53802410 (53.8 MB)  TX bytes:179619788 (179.6 MB)
          Interrupt:35

eth1      Link encap:Ethernet  HWaddr e0:db:55:1f:99:b5
          inet addr:169.254.169.254  Bcast:0.0.0.0  Mask:255.255.255.255
          inet6 addr: fe80::e2db:55ff:fe1f:99b5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:752581 errors:0 dropped:0 overruns:0 frame:0
          TX packets:715623 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:186338905 (186.3 MB)  TX bytes:254970197 (254.9 MB)
          Interrupt:38

eth2      Link encap:Ethernet  HWaddr e0:db:55:1f:99:b6
          inet addr:30.0.0.1  Bcast:30.0.0.255  Mask:255.255.255.0
          inet6 addr: fe80::e2db:55ff:fe1f:99b6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:86510 errors:0 dropped:0 overruns:0 frame:0
          TX packets:40477 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:8169880 (8.1 MB)  TX bytes:5679064 (5.6 MB)
          Interrupt:34

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:6563002 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6563002 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1316707664 (1.3 GB)  TX bytes:1316707664 (1.3 GB)

*qr-c5496165-c7 Link encap:Ethernet  HWaddr fa:16:3e:79:09:ca  *
*          inet addr:100.0.0.1  Bcast:100.0.0.255  Mask:255.255.255.0*
*          inet6 addr: fe80::f816:3eff:fe79:9ca/64 Scope:Link*
*          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1*
*          RX packets:3755 errors:0 dropped:3147 overruns:0 frame:0*
*          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0*
*          collisions:0 txqueuelen:0 *
*          RX bytes:344043 (344.0 KB)  TX bytes:468 (468.0 B)*

tap09a002af-66 Link encap:Ethernet  HWaddr fa:16:3e:9e:11:e0
          inet addr:192.168.19.129  Bcast:192.168.19.255
 Mask:255.255.255.128
          inet6 addr: fe80::f816:3eff:fe9e:11e0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3632 errors:0 dropped:3443 overruns:0 frame:0
          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:243129 (243.1 KB)  TX bytes:594 (594.0 B)

tap0ded1c0f-df Link encap:Ethernet  HWaddr fa:16:3e:0a:08:7a
          inet addr:192.168.19.130  Bcast:192.168.19.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe0a:87a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3346 errors:0 dropped:3149 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:225063 (225.0 KB)  TX bytes:468 (468.0 B)

*tap160480aa-84 Link encap:Ethernet  HWaddr fa:16:3e:54:77:83  *
*          inet addr:100.0.0.3  Bcast:100.0.0.255  Mask:255.255.255.0*
*          inet6 addr: fe80::f816:3eff:fe54:7783/64 Scope:Link*
*          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1*
*          RX packets:10572 errors:0 dropped:3453 overruns:0 frame:0*
*          TX packets:6105 errors:0 dropped:0 overruns:0 carrier:0*
*          collisions:0 txqueuelen:0 *
*          RX bytes:1125984 (1.1 MB)  TX bytes:697815 (697.8 KB)*
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