Hi Jesse, IMHO, MacVTap support in OVS will give a performance boost for the VM traffic.
Regards, Balaji.P > -----Original Message----- > From: dev [mailto:dev-boun...@openvswitch.org] On Behalf Of Jesse Gross > Sent: Friday, May 02, 2014 11:33 PM > To: Suresh Kumar Reddy Reddygari > Cc: dev@openvswitch.org > Subject: Re: [ovs-dev] MacVTap support in OVS > > On Fri, May 2, 2014 at 3:04 AM, Suresh Kumar Reddy Reddygari > <suresh.re...@emulex.com> wrote: > > > > > >> -----Original Message----- > >> From: Jesse Gross [mailto:je...@nicira.com] > >> Sent: Thursday, May 01, 2014 10:07 PM > >> To: Suresh Kumar Reddy Reddygari > >> Cc: dev@openvswitch.org > >> Subject: Re: [ovs-dev] MacVTap support in OVS > >> > >> On Thu, May 1, 2014 at 2:00 AM, Suresh Kumar Reddy Reddygari > >> <suresh.re...@emulex.com> wrote: > >> > Hi, > >> > > >> > Is MacVTap support there in OVS. If not, is there any plan to > support it. > >> > >> No. > >> > >> What are you trying to do? > > > > Hi Jesse, > > > > As you know, Hypervisors like Xen/Citrix/KVM typically host one or > > more virtual machines (VMs) and provide network connectivity to the VMs > by connecting to the uplink Ethernet interface via a bridge module such > as Linux Bridge or Open vSwitch (OVS.) The Hypervisors (citrix) > configure the uplink interface in MAC and VLAN promiscuous mode. But the > MacVTap driver does not configure the up-link Ethernet interface in > promiscuous mode. Instead, it programs the up-link Ethernet interface > with the MAC addresses and VLANs used by the virtual NICs in the VMs. > > Please correct me if I am wrong. > > > > There are some advantages by using MacVTap. Hence I am looking for > MacVTap support in OVS. > > > > Why are we not supporting MacVTap in OVS ? Are there any disadvantages > ? > > macvtap is a parallel mechanism for connecting VMs. It does not make > sense to "support" it in OVS. > > It is theoretically possible to have OVS configure MAC and VLAN filters > in the NIC. However, in most cases the upstream switch will flood > relatively few unknown packets so the advantages are minimal. > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
