** Changed in: neutron
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/1461133
Title:
[RFE] Supporting multiple L3 backends
Status in neutron:
Fix Released
Bug description:
There are a variety of hardware and software options available to
handle layer 3 (routing) in Neutron environments with various
tradeoffs. Currently a single Neutron instance can be configured to
support only one routing mechanism at a time and this leads to a need
to build multiple OpenStack zones based on different requirements.
<snip>
This RFE is analogous to the ML2 framework. I would like to see a standard
vendor neutral framework/API for creating/maintaining L3 routing constructs
with a standard way for vendors/developers to build mechanism drivers to effect
the desired routing on a variety of hardware and software platforms.
In terms of broader scope (perhaps not initial implementation) there are a
number of L3 related developments taking place that could benefit from the
logical (aka "type") constructs from the implementation (aka "mechanism")
constructs. e.g. BGP VPNs, IPSec/SSL VPNs, Service Chaining, QoS.
<snip>
The vision here is that the OpenStack community would standardize on
what virtual routers can do, then individual companies/people with an
interest in specific L3 implementations would build mechanism drivers
to do those things. An essential criteria is that it should be
possible to mix mechanisms within a single OpenStack zone rather than
building separate building entirely separate Nova/Neutron/computenode
environments based on a single L3 mechanism.
Some examples of ways to handle L3 currently: L3 agent on x86, SDN
software Contrail, Nuage, NSX, OVN, Plumgrid, and others, in hardware
on a variety of vendors' switch/router platforms Arista, Cisco,
others.
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