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[Vasyl Saienko <vsaienko@xxxxxxxxxxxx>]

** Also affects: neutron
   Importance: Undecided
       Status: New

** Changed in: ironic
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1684038

Title:
  ironic CI regression: dnsmasq doesn't respond to dhcp request

Status in Ironic:
  New
Status in neutron:
  New

Bug description:
  All jobs that uses flat network_interface are failed because bootstrap
  can't get IP address from DHCP server.

  An example of failed job is:
  http://logs.openstack.org/38/447538/6/check/gate-tempest-dsvm-ironic-ipa-wholedisk-bios-agent_ipmitool-tinyipa-ubuntu-xenial-nv/f57afee/logs/

  In the syslog we can see that DHCP doesn't respond to requests:

  http://logs.openstack.org/38/447538/6/check/gate-tempest-dsvm-ironic-
  ipa-wholedisk-bios-agent_ipmitool-tinyipa-ubuntu-xenial-
  nv/f57afee/logs/syslog.txt.gz#_Apr_18_12_30_00

  
  Apr 18 12:30:00ubuntu-xenial-internap-mtl01-8463102 dnsmasq-dhcp[3453]: DHCPDISCOVER(tap6a904c1b-03) 52:54:00:f3:12:ee no address available
  Apr 18 12:30:00ubuntu-xenial-internap-mtl01-8463102 ntpd[1715]: Listen normally on 15 vnet0 [fe80::fc54:ff:fef3:12ee%19]:123
  Apr 18 12:30:00ubuntu-xenial-internap-mtl01-8463102 ntpd[1715]: new interface(s) found: waking up resolver
  Apr 18 12:30:01ubuntu-xenial-internap-mtl01-8463102 dnsmasq-dhcp[3453]: DHCPDISCOVER(tap6a904c1b-03) 52:54:00:f3:12:ee no address available
  Apr 18 12:30:03ubuntu-xenial-internap-mtl01-8463102 dnsmasq-dhcp[3453]: DHCPDISCOVER(tap6a904c1b-03) 52:54:00:f3:12:ee no address available
  Apr 18 12:30:07ubuntu-xenial-internap-mtl01-8463102 dnsmasq-dhcp[3453]: DHCPDISCOVER(tap6a904c1b-03) 52:54:00:f3:12:ee no address available

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