[ovs-discuss] openvswitch with vlans and libvirt issues

Sat Jul 5 21:02:41 UTC 2014

my untagged management network is 10.128.7.0/24

vlan2 should be 10.128.2.0/24

Version info is

root at vmnode2:~# ovs-vsctl -V
ovs-vsctl (Open vSwitch) 2.0.1
Compiled Feb 23 2014 14:42:32

root at vmnode2:~# virsh --version
1.2.2

I created the following network  

<network>
  <name>vlans</name>
  <forward mode='bridge'/>
  <bridge name='br0'/>
  <virtualport type='openvswitch'/>
  <portgroup name='vlan-01' default='yes'>
  </portgroup>
  <portgroup name='vlan-02'>
    <vlan>
      <tag id='2'/>
    </vlan>
  </portgroup>
  <portgroup name='vlan-03'>
    <vlan>
      <tag id='3'/>
    </vlan>
  </portgroup>
  <portgroup name='vlan-all'>
    <vlan trunk='yes'>
      <tag id='2'/>
      <tag id='3'/>
    </vlan>
  </portgroup>
</network>

I have given my guest the following network

    <interface type='network'>
      <mac address='52:54:00:db:ba:70'/>
      <source network='vlans'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='6a00da12-ff0d-42da-a12a-b00066f242c1' profileid='vlan-02'/>
      </virtualport>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>

When launch a guest VM on that vlan subnet nothing works. On the host is as follows

root at vmnode2:~# ifconfig
bond0     Link encap:Ethernet  HWaddr 00:25:90:ed:dc:f0
          inet6 addr: fe80::225:90ff:feed:dcf0/64 Scope:Link
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:210361 errors:0 dropped:6 overruns:0 frame:0
          TX packets:74236 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:14193164 (14.1 MB)  TX bytes:67399247 (67.3 MB)

br0       Link encap:Ethernet  HWaddr 00:25:90:ed:dc:f0
          inet addr:10.128.7.121  Bcast:10.128.7.255  Mask:255.255.255.0
          inet6 addr: fe80::225:90ff:feed:dcf0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:188443 errors:0 dropped:0 overruns:0 frame:0
          TX packets:38146 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:10057289 (10.0 MB)  TX bytes:65097839 (65.0 MB)

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:65536  Metric:1
          RX packets:71271 errors:0 dropped:0 overruns:0 frame:0
          TX packets:71271 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:66330359 (66.3 MB)  TX bytes:66330359 (66.3 MB)

p1p1      Link encap:Ethernet  HWaddr 00:25:90:ed:dc:f0
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:150410 errors:0 dropped:0 overruns:0 frame:0
          TX packets:58252 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:9801784 (9.8 MB)  TX bytes:65992941 (65.9 MB)

p1p2      Link encap:Ethernet  HWaddr 00:25:90:ed:dc:f0
          UP BROADCAST RUNNING SLAVE MULTICAST  MTU:1500  Metric:1
          RX packets:59951 errors:0 dropped:6 overruns:0 frame:0
          TX packets:15984 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4391380 (4.3 MB)  TX bytes:1406306 (1.4 MB)

vnet0     Link encap:Ethernet  HWaddr fe:54:00:db:ba:70
          inet6 addr: fe80::fc54:ff:fedb:ba70/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:118 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:5580 (5.5 KB)  TX bytes:648 (648.0 B)

root at vmnode2:~# ovs-vsctl show
a40f3e13-2a84-4602-a79b-1ca7cc6d05d8
    Bridge "br0"
        Port "br0"
            Interface "br0"
                type: internal
        Port "vnet0"
            Interface "vnet0"
        Port "bond0"
            Interface "bond0"
    ovs_version: “2.0.1”

I get traffic on vnet0 but it doesn’t seem to be connected to br0

root at vmnode2:~# tcpdump -i vnet0 src host 10.128.2.210
tcpdump: WARNING: vnet0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vnet0, link-type EN10MB (Ethernet), capture size 65535 bytes
14:01:56.210023 ARP, Request who-has 10.128.2.1 tell 10.128.2.210, length 28
14:01:57.210012 ARP, Request who-has 10.128.2.1 tell 10.128.2.210, length 28
14:01:58.229238 ARP, Request who-has 10.128.2.1 tell 10.128.2.210, length 28
14:01:59.226044 ARP, Request who-has 10.128.2.1 tell 10.128.2.210, length 28
14:02:00.226048 ARP, Request who-has 10.128.2.1 tell 10.128.2.210, length 28

root at vmnode2:~# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.002590eddcf0 yes bond0

Mike Zupan

Senior Linux Engineer | Recurly

mike at recurly.com

P 917-645-2315

recurly.com (http://recurly.com/)

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