neutron/releasenotes/notes/dhcp_ext_for_ovs_agent-ee895747687c7b58.yaml
LIU Yulong 56e8498a4d Add agent extension 'dhcp' for ovs agent
Add a new ovs agent extension to support distributed DHCP for
VMs in compute nodes directly. For large scale deployment, this
can be used to reduce the number of neutron agents. Large scale
cloud can benefit from it.

From the perspective of virtual machine, this will reduce the
probability of DHCP request failure. The VMs will get a higher
level availability for DHCP R/R, no single point of failure
permanently. If one host goes down, VMs in other hosts will not
be influnced by it.

For the perspective of network performance, after using this
extension, the DHCP broadcasting packages will be limited
to the host locally.

Partially-Implements: bp/distributed-dhcp-for-ml2-ovs
Closes-Bug: #1900934
Change-Id: Id8a4c501daad7c2185e6d69441182666ef987e61
2021-06-24 08:38:38 +08:00

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YAML

---
features:
- |
Added a new OVS agent extension ``dhcp`` to support distributed
DHCP for VMs in compute nodes directly. To enable this just
set ``extensions=dhcp`` to OVS agent config file under ``[agent]``
section. We also add a new config section ``[dhcp]`` which
has options ``enable_ipv6 = True/False`` for indicating whether
enable the DHCPv6 for VM ports.