On Fri, Jul 15, 2016 at 03:55:23PM +0530, Kapil Adhikesavalu wrote:
> Hello,
>
> Need some help in configuring flow table eviction group.
> I tried to configure the eviction group, but i am seeing some warn/errors
> and didn't come across any sample commands in web.
>
> 1. Can you please share some sample commands for passing NXM_OF_IN_PORT[]
> as an argument to flow_table, overflow_policy, "groups"
Something like this:
ovs-vsctl \
-- --id=@ft create Flow_Table flow_limit=100 \
overflow_policy=evict groups='"NXM_OF_IN_PORT[]"' \
-- set Bridge br0 flow_tables:0=@ft
> 2. As overflow_policy=evict, by default removes the flow which is going to
> expire at the earliest.
> i want to configure the group in such a way, the group with the highest
> number of common VLAN entries should evict first, i suppose i need to use
> NXM_OF_VLAN_TCI
Yes.
> 3. Is it possible to do flow table eviction based on the output port
> instead of NXM_OF_IN_PORT ? there is no NXM_OF_OUT_PORT, so is that NO ?
That's "no".
> The reason i am asking this is, I use "Learn" action to dynamically
> create MAC learn flows; so there will be more entries with common output
> port, than source VLAN or MAC, so doing eviction based on output port is
> preferred ?
>
> This is what i tried in ovs-2.5.0, i am getting following warning.
> ovs-vsctl add-br kapil
> ovs-vsctl -- --id=@ft create Flow_Table flow_limit=5
> overflow_policy=evict group=NXM_OF_IN_PORT -- set Bridge kapil
> flow_tables=0=@ft
>
> Warning in OVS log: 2016-07-15T09:42:35.704Z|00381|bridge|WARN|bridge
> kapil table 0: error parsing 'groups' (NXM_OF_IN_PORT: missing [ looking
> for field name)
>
> root@ubuntu:~# ovs-vsctl list flow_table
> _uuid : f2d9a3b4-ee77-4bf9-b364-6f78ab9560d7
> external_ids : {}
> flow_limit : 5
> groups : [NXM_OF_IN_PORT]
> name : []
> overflow_policy : evict
> prefixes : []
>
> Thanks
> Kapil.
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