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[Launchpad Bug Tracker <1721157@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init - 17.1-17-g45d361cb-
0ubuntu1

---------------
cloud-init (17.1-17-g45d361cb-0ubuntu1) artful; urgency=medium

  * New upstream snapshot.
    - net: Handle bridge stp values of 0 and convert to boolean type
      [Chad Smith]
    - tools: Give specific --abbrev=8 to "git describe"
    - network: bridge_stp value not always correct [Ryan Harper] (LP: #1721157)
    - tests: re-enable tox with nocloud-kvm support [Joshua Powers]

 -- Ryan Harper <ryan.harper@xxxxxxxxxxxxx>  Thu, 05 Oct 2017 16:15:34
-0500

** Changed in: cloud-init (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1721157

Title:
  netplan render drops bridge_stp setting

Status in cloud-init:
  Fix Committed
Status in cloud-init package in Ubuntu:
  Fix Released

Bug description:
  cloud-init tip fails to render a netplan bridge configuration with a
  stp value.

  % cat network_configs/bridge-simple.yaml 
  showtrace: true
  network:
      version: 1
      config:
          # Physical interfaces.
          - type: physical
            name: eth0
            mac_address: "52:54:00:12:34:00"
            subnets:
                - type: dhcp4
          - type: physical
            name: eth1
            mac_address: "52:54:00:12:34:02"
          # Bridge
          - type: bridge
            name: br0
            bridge_interfaces:
              - eth1
            params:
                bridge_fd: 150
                bridge_stp: 'off'

  
  Currently renders a netplan config of:

  network:
      version: 2
      ethernets:
          eth0:
              dhcp4: true
              match:
                  macaddress: '52:54:00:12:34:00'
              set-name: eth0
          eth1:
              match:
                  macaddress: '52:54:00:12:34:02'
              set-name: eth1
      bridges:
          br0:
              interfaces:
              - eth1
              parameters:
                  forward-delay: 150

  
  netplan in artful with bridge stp support enables STP by default (unless disabled)
  This prevents setting some values of forward-delay.  In any case, we should translate
  the bridge_stp value to the netplan boolean.

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