[ovs-discuss] some Queries on OVS 1.2.2

[Ben Pfaff]

On Wed, Dec 14, 2011 at 12:31:43PM +0530, Sheili Mittal wrote:
> On Wed, Dec 14, 2011 at 11:57:36AM +0530, Sheili Mittal wrote:
> > 1) I haven't found commands to configure HTB and HFSC queuing
> > Disciplines Ethernet Source Address, is this supported in OVS and with
> > what scope?
> 
> I don't understand why a queuing discipline would be associated with an
> Ethernet source address.  Can you explain?
> 
> [Sheili] It is a mistake , sorry. here I want to know how I will
> configure HTB and HFSC on OVS, and what set-up you used to test this as
> black-box testing. 

ovs-vswitchd.conf.db(5) explains how to configure HTB and HFSC on OVS.

You can use OpenFlow to assign packets to queues, if that's what your
question about source address is getting at.  ovs-ofctl(8) has some
information on how that can work.

I don't know what QA does for testing here.

> > 2) Per VM Policing:- I am confused with this feature, as we are
> covering
> > QOS ratelimiting and "HTB and HFSC" then could you please tell what is
> > per VM Policing?
> 
> [Sheili] my doubt was , same we are doing in QOS Ratelimiting also with
> setting rate and burst, then what is the difference between per VM
> policing and QOS ratelimiting?

Policing happens on ingress.  QoS ratelimiting happens on egress.

> > 3) I haven't found ECN (Explicit congestion notification) code much,
> > what topology we should take to test this?
> 
> What do you want to do with ECN?
> 
> [Sheili] I want to do black-box testing of this . Topology here means
> is the set-up used for.

It's very hard to recommend what to do if you don't explain your goal.

> > 5) I haven't found much on H/W offloading, is this supported or
> > meaningful for OVS 1.2.2
> 
> What do you want to offload to hardware?  OVS supports most of the
> hardware offloads that Linux itself does.
> 
> [Sheili] my concern was , If we are doing black-box testing of OVS 1.2.2
> then is there meaning to test the hardware offloading also?

If you enable hardware offloads during your tests, then necessarily the
testing of OVS will test the hardware offloads.

> > 6) Are all 4 support in OVS 1.2.2, what topology you used to test
> this?
> > Tunneling:-
> > 	GRE
> > 	GRE Over IPSec
> > 	CAPWAP
> > 	IPSec
> 
> Yes, all of these are supported.  Please see ovs-vswitchd.conf.db(5) for
> details.
> 
> GRE over IPsec is only supported in specific configurations.
> 
> I don't know what you mean by topology in this case.
> 
> [Sheili] topology means the set-up used for. I saw set-up for
> QOS,VLAN,sflow on openvswitch site in "documentation" tab, so are we
> having set-up for other feature also?

Please see ovs-vswitchd.conf.db(5) for setup information.