Paul Congdon (UC Davis)
2009-Jun-12 09:53 UTC
[Bridge] RFC: Simple Private VLAN impl. (Paul Congdon)
> > In the virtualization case, I think it's actually easier: do it via > MAC addresses instead of interfaces. In this case, since you're > creating the virtual environments, you'll know the MAC address that > gets generated for each VE. > > 1) Set your policy to deny. > 2) Permit all frames destined to/from the promiscuous MACs. > 3) Permit all broadcast frames to the promiscuous MACs. > > That takes care of the "isolated" use case. If you need to support > the "community" case: > 4) Add pairwise bidirectional rules to permit communications between > each MAC in a community. > > Why is this easier? Since you know the MACs of the VEs, you have a > trivial way of identifying the rules associated with a VE. This way, > you know what rules to spin up and remove during the turnup or > disabling of a VE. Moreover, since all of the rules permit specific > traffic, the order doesn't even matter. >Ross certainly has a point. I believe there is perhaps yet another better way to handle this scenario. It is called VEPA = Virtual Ethernet Port Aggregation. It is definitely easier than PVLANs for VMs and there are no additional ebtables rules required. A patch should be coming for this later today or tomorrow. See: http://www.ieee802.org/1/files/public/docs2009/new-hudson-vepa_seminar-20090 514d.pdf for details. Paul