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[Launchpad Bug Tracker <1605343@xxxxxxxxxxxxxxxxxx>]

[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/1605343

Title:
  [rfe] update CIDR for subnet

Status in neutron:
  Expired

Bug description:
  Use case to solve: as an operator I want to expand or shrink Public
  network without re-allocating all Floating IPs.

  Currently, updating subnet CIDR is blocked by validation from API
  side. By the way, PD code is already updating CIDRs so far.

  Generic approach is:

    1. Accept CIDR and optionally allocation pools and gateway_ip.
    2. If new allocation pool is not provided, and old pool is not fit into
       CIDR, then fail. Same for GW.
    3. Re-allocate IP if they're out of new allocation pool.

  Here is a proposed patch https://review.openstack.org/#/c/345594/

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