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[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1835484

Title:
  Restart dhcp-agent cause IPv6 vm can't renew IP address, will lost
  minutes or hours

Status in neutron:
  Expired

Bug description:
  In this patch https://bugs.launchpad.net/neutron/+bug/1722126 when
  restart neutron-dhcp-agent, all ipv6 lease line will be removed.

  problem step:
  . set dhcp_lease_duration=200 in neutron.conf and restart neutron-dhcp-agent
  . create ipv6 subnet
  . boot a vm in this subnet, login and get an ipv6 address
  . in /var/lib/neutron/dhcp/xxx-xxx-xxx/leases, you will find 
     "1562308744 1045083158 100:200::1a ***"
  . restart neutron-dhcp-agent, /var/lib/neutron/dhcp/xxx-xxx-xxx/leases file will be cleaned
  . wait 200 seconds, the vm will lost ipv6 address

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