On 07/01/2015 04:11 AM, Gal Sagie wrote:
> Hello Everyone,
> 
> As you might know, allowed address pairs in neutron is an extension to
> allow port
> to have more then a pair of MAC-IP addresses assigned to it.
> This is useful for cases of where few VM's need to share virtual MAC/IP,
> like
> for VRRP, Load balancing, NFV use cases and so on...
> (Aaron who implemented it as far as i know can maybe elaborate)
> 
> Its not urgent but i believe that we can support this in Neutron OVN (at
> least for L2)
> By adding all the MAC addresses configured to a certain logical port.

You cant set the same MAC address on more than one logical port.  The
behavior is undefined.  Packets will go to 1 of them, but it's undefined
which one.

It's fine to set the same MAC address in port_security for multiple
logical ports like we do now, but I'm not sure it's useful yet.

What's the expected behavior?  Is it that a set of ports is allowed a
MAC address, but we should do MAC learning to figure out which one is
actively using it?

> However, when L3 is going to be introduced, we cant just also add all
> the IP addresses, because security wise this means that a certain IP
> must be assigned to a certain MAC address (please correct me if i am
> wrong here)
> 
> Just wanted to put this here, so when L3 design is finalized these
> connections
> are also taken care of in OVN for port security.
> 
> Please share any comments/thoughts.
> 
> Thanks
> Gal.
> 


-- 
Russell Bryant
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