tripleo-heat-templates/releasenotes/notes/set-tenant-net-mtu-as-neutron-global-physnet-mtu-5e3515a97e8e0367.yaml
Harald Jensås bbfce240fc Use mtu of Tenant network to control neutron global_physnet_mtu
Change: I11e38f82eb9040f77412fe8ad200fcc48031e2f8 introduced mtu
property for composable networks. This change set the MTU of the
Tenant network as the global_physnet_mtu for neutron, unless the
NeutronGlobalPhysnetMtu is overridden. The default MTU used if
no MTU is defined for the Tenant network is 1500. (The same
default was previously used for the NeutronGlobalPhysnetMtu
parameter.)

Change-Id: I5e60d52ad571e1cdb3b82cd1d9947e33fa682bf8
2018-12-22 17:06:45 +01:00

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YAML

---
features:
- |
The MTU defined for the ``Tenant`` network in network_data is now used to
set neutron's ``global_physnet_mtu`` unless the ``NeutronGlobalPhysnetMtu``
parameter is used to override the default. (Neutron uses the
``global_physnet_mtu`` value to calculate MTU for all virtual network
components. For flat and VLAN networks, neutron uses this value without
modification. For overlay networks such as VXLAN, neutron automatically
subtracts the overlay protocol overhead from this value.)