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Reviewed:  https://review.openstack.org/509836
Committed: https://git.openstack.org/cgit/openstack/neutron-lib/commit/?id=5deda57e17546cd14eb07f2bb1fae4b4ab4e8d67
Submitter: Jenkins
Branch:    master

commit 5deda57e17546cd14eb07f2bb1fae4b4ab4e8d67
Author: Boden R <bodenvmw@xxxxxxxxx>
Date:   Thu Oct 5 11:00:14 2017 -0600

    revert get_random_mac behavior from review 400408
    
    Commit If2539f94b5479f0d6afa64c973082cbe8c5309ac made get_random_mac
    more versatile. However, in the process it introduced incompatibilities
    with the current behavior of randomizing mac as outlined in the
    respective bug report.
    
    This patch reverts the logic of get_random_mac back to its original
    behavior for backwards compatibility as we suspect no one is relying
    on the new behavior from If2539f94b5479f0d6afa64c973082cbe8c5309ac.
    
    Change-Id: I047ff3e17c19fc80a47d3c73ee955103a71d2b30
    Closes-Bug: #1720046


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1720046

Title:
  vm boot failure because of wrong mac address

Status in neutron:
  Fix Released

Bug description:
  Hi,
     I used same base_mac configuration as previous release. It is "base_mac = 00:05:86:00:00:00".

  As the comments in /etc/neutron.conf, the mac address should be fixed in first 3 octets.
  # The base MAC address Neutron will use for VIFs. The first 3 octets will
  # remain unchanged. If the 4th octet is not 00, it will also be used. The
  # others will be randomly generated. (string value)

  But in my case, it generated below mac address(9d:05:86:ba:64:a5) and failed to boot vm.
  It complains "expected unicast mac address, found multicast '9d:05:86:ba:64:a5'"

  Below is nova-compute log:
  2017-09-28 10:16:13.553 18290 INFO os_vif [req-9047022d-dcb0-4a6d-bb17-d3cb1a530dd7 928cd394b6414f30ada45587ea5eb1a7 3577dbdee580484eac05b3e89d37b00f - default default] Successfully plugged vif VIFBridge(active=False,address=9d:05:86:ba:64:a5,bridge_name='brqb8c050bf-16',has_traffic_filtering=True,id=56595ff5-080b-481d-93ce-09ccdd943a42,network=Network(b8c050bf-16e3-4fb0-8376-96dd1974b4ea),plugin='linux_bridge',port_profile=<?>,preserve_on_delete=False,vif_name='tap56595ff5-08')
  2017-09-28 10:16:13.555 18290 ERROR nova.virt.libvirt.guest [req-9047022d-dcb0-4a6d-bb17-d3cb1a530dd7 928cd394b6414f30ada45587ea5eb1a7 3577dbdee580484eac05b3e89d37b00f - default default] Error defining a guest with XML: <domain type="kvm">
    <uuid>b4f36284-2537-455f-b0f3-5562ac7f7d83</uuid>
    <name>instance-0000000b</name>
    <memory>8388608</memory>
    <vcpu>2</vcpu>
    <metadata>
      <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0";>
        <nova:package version="16.0.0-1.el7"/>
        <nova:name>test-vm</nova:name>
        <nova:creationTime>2017-09-28 02:16:13</nova:creationTime>
        <nova:flavor name="2x8x60">
          <nova:memory>8192</nova:memory>
          <nova:disk>60</nova:disk>
          <nova:swap>0</nova:swap>
          <nova:ephemeral>0</nova:ephemeral>
          <nova:vcpus>2</nova:vcpus>
        </nova:flavor>
        <nova:owner>
          <nova:user uuid="928cd394b6414f30ada45587ea5eb1a7">xmchen</nova:user>
          <nova:project uuid="3577dbdee580484eac05b3e89d37b00f">xmchen</nova:project>
        </nova:owner>
        <nova:root type="image" uuid="9f3c23db-5d67-4aba-9dd2-aec5287f5f1c"/>
      </nova:instance>
    </metadata>
    <sysinfo type="smbios">
      <system>
        <entry name="manufacturer">RDO</entry>
        <entry name="product">OpenStack Compute</entry>
        <entry name="version">16.0.0-1.el7</entry>
        <entry name="serial">1e15f5b2-e204-43bd-8377-e4804db44e5d</entry>

        <entry name="uuid">b4f36284-2537-455f-b0f3-5562ac7f7d83</entry>
        <entry name="family">Virtual Machine</entry>
      </system>
    </sysinfo>
    <os>
      <type>hvm</type>
      <boot dev="hd"/>
      <smbios mode="sysinfo"/>
    </os>
    <features>
      <acpi/>
      <apic/>
    </features>
    <cputune>
      <shares>2048</shares>
    </cputune>
    <clock offset="utc">
      <timer name="pit" tickpolicy="delay"/>
      <timer name="rtc" tickpolicy="catchup"/>
      <timer name="hpet" present="no"/>
    </clock>
    <cpu mode="host-model" match="exact">
      <topology sockets="2" cores="1" threads="1"/>
    </cpu>
    <devices>
      <disk type="file" device="disk">
        <driver name="qemu" type="qcow2" cache="none"/>
        <source file="/var/lib/nova/instances/b4f36284-2537-455f-b0f3-5562ac7f7d83/disk"/>
        <target bus="virtio" dev="vda"/>
      </disk>
      <interface type="bridge">
        <mac address="9d:05:86:ba:64:a5"/>
        <model type="virtio"/>
        <source bridge="brqb8c050bf-16"/>
        <target dev="tap56595ff5-08"/>
      </interface>
      <serial type="file">
        <source path="/var/lib/nova/instances/b4f36284-2537-455f-b0f3-5562ac7f7d83/console.log"/>
      </serial>
      <serial type="pty"/>
      <input type="tablet" bus="usb"/>
      <graphics type="vnc" autoport="yes" keymap="en-us" listen="10.0.0.110"/>
      <video>
        <model type="cirrus"/>
      </video>
      <memballoon model="virtio">
        <stats period="10"/>
      </memballoon>
    </devices>
  </domain>
  : libvirtError: XML error: expected unicast mac address, found multicast '9d:05:86:ba:64:a5'
  2017-09-28 10:16:13.556 18290 ERROR nova.virt.libvirt.driver [req-9047022d-dcb0-4a6d-bb17-d3cb1a530dd7 928cd394b6414f30ada45587ea5eb1a7 3577dbdee580484eac05b3e89d37b00f - default default] [instance: b4f36284-2537-455f-b0f3-5562ac7f7d83] Failed to start libvirt guest: libvirtError: XML error: expected unicast mac address, found multicast '9d:05:86:ba:64:a5'

  Version:
  Pike on CentOS 7:
  openstack-neutron-11.0.0-1.el7.noarch
  openstack-neutron-common-11.0.0-1.el7.noarch
  openstack-neutron-linuxbridge-11.0.0-1.el7.noarch
  python-neutron-lib-1.9.1-1.el7.noarch
  python-neutron-11.0.0-1.el7.noarch
  openstack-neutron-ml2-11.0.0-1.el7.noarch

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