>
>
> "markm75" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
> > I run about 8 VM's on our 2003 x64 host server.. it was suggested to me,
> > that
> > the issues i have been having recently, where i have to reboot the whole
> > host
> > or repair individual guest nic connections, may be due to the fact i have
> > too
> > many guests on the single gigabit nic in the server (i havent had the
> > other
> > one enabled in the past)..
> >
> > I also saw another thread in here, someone mentioned that in fact, having
> > dual nics on a server doesnt really do much good in itself.. except for
> > maybe
> > dedicating one to the host and one to the vm's? (IE: clear all check
> > boxes
> > on the nic that i want to be visible to VM's?)..
> >
> > I initially was thinking it best to take 4 of the 8 and put them on the
> > other nic, but in their config settings, i only see one of the two host
> > nics.. and both host nicks have the virtual network option checked, but
> > again, from the sounds of the other thread, this may not help?
> >
> > What would i be best off doing here? Simply clearing all but the virtual
> > part on the one nic and having the other one for the host? (how do i make
> > the other nic show up as well, in the vm console?)
> >
> > Right now, i seem to be getting about 125mb/s on each VM.. the main host
> > has
> > the single gigabit card enabled .. its also not clear to me if bandwidth
> > is
> > supposed to be shared (unevenly) with the host or not? IE: 1 gigabit
> > bandwidth possible in a single VM if it calls for it like vmware?
> >
> > Thanks in advance on this..
> >
> >
> >
> >
>
> As Charlie said in the other thread, virtual networks connected to a
> physical NIC are not magic. They cannot run faster than the underlying
> physical network.
>
> Having two NICs, each connected to its own switch port on the physical
> switch, would theoretically give you better network performance in the vms.
> You really need to know what each vm is doing before you can attempt to load
> balance the I/O.
>
> There is no "best practice" which suits all situations. Eight vms on one
> NIC could be quite adequate in some situations while two vms on one NIC
> could be a bottleneck. If a vm does a lot of I/O it might need a dedicated
> physical NIC.
>
> If you are getting about 125 Mb/s in each vm you are doing very well
> (and the host can't be using much at all!) Have you measured what throughput
> you can get with just one vm running?
>
>
>

> I run about 8 VM's on our 2003 x64 host server.. it was suggested to me,
> that
> the issues i have been having recently, where i have to reboot the whole
> host
> or repair individual guest nic connections, may be due to the fact i have
> too
> many guests on the single gigabit nic in the server (i havent had the
> other
> one enabled in the past)..
>
> I also saw another thread in here, someone mentioned that in fact, having
> dual nics on a server doesnt really do much good in itself.. except for
> maybe
> dedicating one to the host and one to the vm's? (IE: clear all check
> boxes
> on the nic that i want to be visible to VM's?)..
>
> I initially was thinking it best to take 4 of the 8 and put them on the
> other nic, but in their config settings, i only see one of the two host
> nics.. and both host nicks have the virtual network option checked, but
> again, from the sounds of the other thread, this may not help?
>
> What would i be best off doing here? Simply clearing all but the virtual
> part on the one nic and having the other one for the host? (how do i make
> the other nic show up as well, in the vm console?)
>
> Right now, i seem to be getting about 125mb/s on each VM.. the main host
> has
> the single gigabit card enabled .. its also not clear to me if bandwidth
> is
> supposed to be shared (unevenly) with the host or not? IE: 1 gigabit
> bandwidth possible in a single VM if it calls for it like vmware?
>
> Thanks in advance on this..
>
>
>
>