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[shihanzhang <shihanzhang@xxxxxxxxxx>]

Public bug reported:

In my environment, I delete the dhcp port by mistack, then I found the vm in primary subnet can not get IP, the reason is that when a dhcp port is deleted, neutron will create the dhcp port automaticly, but the VIF TAP will not be deleted, you will see one IP in two VIF TAP
 
root@shz-dev:~# ip netns exec qdhcp-ab049276-3b7c-41a2-b62c-3f587a02b0a6 ifconfig
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:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:576 (576.0 B)  TX bytes:576 (576.0 B)

tap4694b3c4-a6 Link encap:Ethernet  HWaddr fa:16:3e:41:f6:fc  
          inet addr:50.50.50.2  Bcast:50.50.50.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe41:f6fc/64 Scope:Link
          UP BROADCAST RUNNING PROMISC  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:796 (796.0 B)

tapa546a666-31 Link encap:Ethernet  HWaddr fa:16:3e:98:dd:a7  
          inet addr:50.50.50.2  Bcast:50.50.50.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe98:dda7/64 Scope:Link
          UP BROADCAST RUNNING PROMISC  MTU:1500  Metric:1
          RX packets:0 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:0 (0.0 B)  TX bytes:496 (496.0 B)

Even if the problem is caused by error operation, I think the dhcp port
should not allow be deleted, the port on router can not be deleted.

** Affects: neutron
     Importance: Undecided
     Assignee: shihanzhang (shihanzhang)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => shihanzhang (shihanzhang)

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https://bugs.launchpad.net/bugs/1279683

Title:
  The problem generated by deleting dhcp'port by mistack

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  In my environment, I delete the dhcp port by mistack, then I found the vm in primary subnet can not get IP, the reason is that when a dhcp port is deleted, neutron will create the dhcp port automaticly, but the VIF TAP will not be deleted, you will see one IP in two VIF TAP
   
  root@shz-dev:~# ip netns exec qdhcp-ab049276-3b7c-41a2-b62c-3f587a02b0a6 ifconfig
  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:1 errors:0 dropped:0 overruns:0 frame:0
            TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 
            RX bytes:576 (576.0 B)  TX bytes:576 (576.0 B)

  tap4694b3c4-a6 Link encap:Ethernet  HWaddr fa:16:3e:41:f6:fc  
            inet addr:50.50.50.2  Bcast:50.50.50.255  Mask:255.255.255.0
            inet6 addr: fe80::f816:3eff:fe41:f6fc/64 Scope:Link
            UP BROADCAST RUNNING PROMISC  MTU:1500  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 
            RX bytes:0 (0.0 B)  TX bytes:796 (796.0 B)

  tapa546a666-31 Link encap:Ethernet  HWaddr fa:16:3e:98:dd:a7  
            inet addr:50.50.50.2  Bcast:50.50.50.255  Mask:255.255.255.0
            inet6 addr: fe80::f816:3eff:fe98:dda7/64 Scope:Link
            UP BROADCAST RUNNING PROMISC  MTU:1500  Metric:1
            RX packets:0 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:0 (0.0 B)  TX bytes:496 (496.0 B)

  Even if the problem is caused by error operation, I think the dhcp
  port should not allow be deleted, the port on router can not be
  deleted.

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