[ovs-discuss] Maximum Number of Access Control List Entries

[Justin Pettit]

> On Mar 21, 2019, at 3:56 AM, Michael Dilmore <m.dilmore12 at gmail.com> wrote:
> 
> Hi guys, 
> 
> Does anyone know if there is a hard limit on the number of ACL entries OpenFlow can manage at once? 
> 
> I'm dealing with over 100 and this is likely to grow in future. I'm wondering whether this might cause issues as my security policies become more complex. 

The only limit is the memory on your host.  I've worked on systems that have hundreds of thousands of flows, and OVS was fine.  The rule of thumb we use is 1-2kb of memory per flow.

--Justin