openstack/openstack-manuals
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Merge "[networking] Remove the content of Newton perspective"

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Jenkins 2017-05-04 17:50:11 +00:00 committed by Gerrit Code Review
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doc/networking-guide/source/config-routed-networks.rst
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@ -6,7 +6,7 @@ Routed provider networks
.. note::
Experimental feature. Use of this feature requires the OpenStack client
Use of this feature requires the OpenStack client
version 3.3 or newer.
Before routed provider networks, the Networking service could not present a
@ -47,29 +47,6 @@ contain configuration for routed provider networks, similar to conventional
provider networks. In the future, implementation of dynamic routing protocols
may ease configuration of routed networks.
Limitations
~~~~~~~~~~~
The Newton implementation contains the following limitations:
* The Compute scheduler lacks awareness of IP address resources on a routed
network. Thus, the scheduler could exhaust the IP addresses in one segment
before assigning IP addresses from another segment. The Ocata release of
the Compute scheduler should provide the capability of scheduling around
segments without available IP addresses. In Newton, the Compute scheduler
selects any compute node on the provider network. If the segment on that
compute node lacks available IP addresses, port binding fails and the
Compute scheduler chooses another compute node without regard to segments.
Rescheduling continues up to the maximum number of retries. Operators
should monitor IP usage and add subnets to segments prior to exhaustion
of IP addresses. For more information, see the
`blueprint <https://blueprints.launchpad.net/neutron/+spec/routed-networks>`__.
* A routed provider network cannot also function as a ``router:external``
networks which prevents compatibility with floating IPv4 addresses.
Additional routing, possibly using :ref:`config-bgp-dynamic-routing`,
could address this issue in the future.
Prerequisites
~~~~~~~~~~~~~