Re: [ovs-discuss] Multiple sFlow instances in Open vSwitch

[Syed Faraz Ali]

Thanks for the suggestion on sampling and polling interval.

And the mininet dashboard looks great, will definitely try in a couple of
days.

Thanks a lot.

On Tue, Sep 20, 2016 at 11:39 PM, Peter Phaal  wrote:

> It looks like you are using Mininet. You might find following real-time
> dashboard useful for visualizing the sFlow data:
>
> http://blog.sflow.com/2016/05/mininet-dashboard.html
>
> You were originally sampling at 1-in-1. This will impact performance and
> limit the size of network you can build and monitor with Mininet. Backing
> off to 1-in-10 greatly reduces the monitoring overhead. In production OVS
> deployments sampling rates of 1-in-1000 are more reasonable.
>
> A polling interval of 1 second tends to be inaccurate since the switch
> port counters are only updated every second. Backing off to a 10 second
> polling interval will give less noisy results and also reduce overhead.
>
>
>
> On Sep 20, 2016, at 12:23 PM, Syed Faraz Ali  wrote:
>
> Thanks a lot.
> Just tested and both sFlow collectors are receiving the traffic.
>
> On Tue, Sep 20, 2016 at 9:06 PM, Peter Phaal 
> wrote:
>
>>
>> > On Sep 20, 2016, at 11:18 AM, Ben Pfaff  wrote:
>> >
>> > On Tue, Sep 20, 2016 at 08:06:19PM +0200, Syed Faraz Ali wrote:
>> >> Is there a way to configure multiple sFlow instances running on the
>> OVS?
>> >> I configured an instance below:
>> >>
>> >> *ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=\"
>> 192.168.1.1:6343
>> >> \" header=128 sampling=1 polling=1 -- set
>> bridge
>> >> s1 sflow=@sflow*
>> >>
>> >> However, the instance gets overwritten if i configure another instance
>> >> (though with a different IP and port).
>> >>
>> >> Multiple sFlow instances are not supported by OVS?
>> >
>> > Each bridge can have one sFlow instance.
>>
>> You can send sFlow from the single instance to multiple destinations:
>>
>> sudo ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=[\"
>> 10.0.0.70:6343\",\”10.0.0.72:6343\"] header=128 sampling=10 polling=10
>> -- set bridge s1 sflow=@sflow
>>
>>
>
>
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Re: [ovs-discuss] Multiple sFlow instances in Open vSwitch

[Syed Faraz Ali]

Thanks a lot.
Just tested and both sFlow collectors are receiving the traffic.

On Tue, Sep 20, 2016 at 9:06 PM, Peter Phaal  wrote:

>
> > On Sep 20, 2016, at 11:18 AM, Ben Pfaff  wrote:
> >
> > On Tue, Sep 20, 2016 at 08:06:19PM +0200, Syed Faraz Ali wrote:
> >> Is there a way to configure multiple sFlow instances running on the OVS?
> >> I configured an instance below:
> >>
> >> *ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=\"
> 192.168.1.1:6343
> >> \" header=128 sampling=1 polling=1 -- set
> bridge
> >> s1 sflow=@sflow*
> >>
> >> However, the instance gets overwritten if i configure another instance
> >> (though with a different IP and port).
> >>
> >> Multiple sFlow instances are not supported by OVS?
> >
> > Each bridge can have one sFlow instance.
>
> You can send sFlow from the single instance to multiple destinations:
>
> sudo ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=[\"
> 10.0.0.70:6343\",\”10.0.0.72:6343\"] header=128 sampling=10 polling=10 --
> set bridge s1 sflow=@sflow
>
>
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Re: [ovs-discuss] Multiple sFlow instances in Open vSwitch

[Peter Phaal]

> On Sep 20, 2016, at 11:18 AM, Ben Pfaff  wrote:
> 
> On Tue, Sep 20, 2016 at 08:06:19PM +0200, Syed Faraz Ali wrote:
>> Is there a way to configure multiple sFlow instances running on the OVS?
>> I configured an instance below:
>> 
>> *ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=\"192.168.1.1:6343
>> \" header=128 sampling=1 polling=1 -- set bridge
>> s1 sflow=@sflow*
>> 
>> However, the instance gets overwritten if i configure another instance
>> (though with a different IP and port).
>> 
>> Multiple sFlow instances are not supported by OVS?
> 
> Each bridge can have one sFlow instance.

You can send sFlow from the single instance to multiple destinations:

sudo ovs-vsctl -- --id=@sflow create sflow agent=eth0 
target=[\"10.0.0.70:6343\",\”10.0.0.72:6343\"] header=128 sampling=10 
polling=10 -- set bridge s1 sflow=@sflow

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Re: [ovs-discuss] Multiple sFlow instances in Open vSwitch

[Ben Pfaff]

On Tue, Sep 20, 2016 at 08:06:19PM +0200, Syed Faraz Ali wrote:
> Is there a way to configure multiple sFlow instances running on the OVS?
> I configured an instance below:
> 
> *ovs-vsctl -- --id=@sflow create sflow agent=eth0 target=\"192.168.1.1:6343
> \" header=128 sampling=1 polling=1 -- set bridge
> s1 sflow=@sflow*
> 
> However, the instance gets overwritten if i configure another instance
> (though with a different IP and port).
> 
> Multiple sFlow instances are not supported by OVS?

Each bridge can have one sFlow instance.
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