[neutron]How to ease congestion at neutron server nodes?

Assaf Muller assaf at redhat.com
Fri Jan 18 22:22:42 UTC 2019

On Fri, Jan 18, 2019 at 1:21 PM shubjero <shubjero at gmail.com> wrote:
> Hi Simon and Sean,
> What amount of throughput are you able to get through your network nodes? At what point do you bottleneck north-south traffic and where is the bottleneck? Can you elaborate more on the multi-queue configuration?
> We have 3 controllers where the neutron server/api/L3 agents run and the active L3 agent for a particular neutron router's will drive the controllers CPU interrupts through the roof (400k) at which point it begins to cause instability (failovers) amongst all L3 agents on that controller node well before we come close to saturating the 40Gbps (4x10Gbps lacp bond) of available bandwidth to it.

I'd look in to either:
1) Splitting out the L3/DHCP/metadata/OVS agents from the controller
nodes to dedicated network nodes
2) Enabling DVR
3) Moving over to OVN with DVR

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