neutron/releasenotes/notes/add-networksegments-uniq-co...

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YAML

---
upgrade:
- |
A unique constraint for (network_id, network_type, physical_network) is
added to the networksegments table. This was done to prevent race
conditions on dynamic segment allocation. Operators having networks with
multiple segments (e.g. when using hierarchical portbinding) should check
that this constraint is not violated with the included upgrade-check.