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[Rodolfo Alonso <1884105@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This bug could be divided in two:
1) IPv6 tags feature [1] introduces, if supported by the dnsmasq version, a new element in the "host" file, the tag:
fa:16:3e:6b:c1:97,tag:dhcpv6,host-fe32-dead-beef--5.localdomain,[fe32:dead:beef::5]

That will shift all other parameters and should be considered when
parsing this file.

2) The IPv6 registers (lines in "host" file) can have more than one IP
address. Each one should be registered as a new item in the set returned
in [2]

[1]https://review.opendev.org/#/q/I833840e7daed2efa7efaece27cfd1ba28e0feb90
[2]https://github.com/openstack/neutron/blob/7d8f400791707e5db7839dcdf3ef4dbbd1dd39bc/neutron/agent/linux/dhcp.py#L876-L894


NOTE: the fix for this bug should be cherry-picked up to Train.

** Affects: neutron
     Importance: Undecided
     Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez)

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https://bugs.launchpad.net/bugs/1884105

Title:
  [DHCP] IPv6 "addr6_list" change the "host" file format

Status in neutron:
  New

Bug description:
  This bug could be divided in two:
  1) IPv6 tags feature [1] introduces, if supported by the dnsmasq version, a new element in the "host" file, the tag:
  fa:16:3e:6b:c1:97,tag:dhcpv6,host-fe32-dead-beef--5.localdomain,[fe32:dead:beef::5]

  That will shift all other parameters and should be considered when
  parsing this file.

  2) The IPv6 registers (lines in "host" file) can have more than one IP
  address. Each one should be registered as a new item in the set
  returned in [2]

  [1]https://review.opendev.org/#/q/I833840e7daed2efa7efaece27cfd1ba28e0feb90
  [2]https://github.com/openstack/neutron/blob/7d8f400791707e5db7839dcdf3ef4dbbd1dd39bc/neutron/agent/linux/dhcp.py#L876-L894

  
  NOTE: the fix for this bug should be cherry-picked up to Train.

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