Re: OT: ip sla packet loss w/o responder ?

Andrew,
yes, this is public (Internet) BE traffic. So yes, no visibility at ISP
side.
Small note, OER does not have its own probes AFAIK. If active, it uses
ip sla, but the passive monitoring is the interesting one for me.
It deduces packet loss from watching tcp sequence numbers!
(Good luck with WAAS traffic though :)
My desire is to tap into this info somehow, is possible.

And as I said, the problem is with inbound, so shapping makes no sense
to me. No way to get to the far side (the cloud).

Thanks,
-Carlos

ALL From_NJ @ 30/10/2009 23:02 -0300 dixit:
> Hey Carlos,
>
> Do I understand that you are loosing packets in the cloud? Can we assume
> you do not have any visibility?
>
> If your traffic traverses a private network, then the provider should have
> some reporting to help you see where the packet loss is. If you are going
> over a best-effort public network then good luck ...
>
> So your idea of adding probes via IP SLA might give you some insight as to
> where traffic problems are occurring. Will this help you to know?
>
> OER is supposed to address this by having it's own probes as you mention.
>
> For outbound traffic between sites, does it make sense to configure some
> shaping and slow that traffic down some? If the far side is getting over
> run, then this is not good either.
>
> Sorry if this response is not all that helpful, however, do please respond
> back with some additional info and thoughts. Kindest regards,
>
> Andrew
>
>
>
>
>
> On Fri, Oct 30, 2009 at 9:40 AM, Carlos G Mendioroz <tron_at_huapi.ba.ar>wrote:
>
>> JR,
>> I'm trying to monitor packet loss in a real network.
>> The whole picture is a medium site with asimetrical connectivity
>> to a couple of providers via 4 links, one of them 8:1 bigger
>> than the next (26M/4M).
>>
>> It is congested INBOUND and we are experiencing outbound issues in
>> services, I suspect related to inbound packet loss. So I want to track
>> loss to be able to put some facts in my theory.
>>
>> I've been pointed to OER, which in fact does track packet loss w/o
>> peer cooperation (as needed AFAIK by ip sla). The problem is that
>> I have not been able to find a way to extract that knowledge from it :(
>> Border routers talk to controllers using a propietary protocol (DRIP),
>> and no MIB is published to expose the data AFAIK.
>>
>> -Carlos
>>
>> JR Garcia @ 28/10/2009 14:32 -0300 dixit:
>>> you could run a program like ping plotter or something similar on your
>>> network.
>>> put a pc on your router and do a ping plot to the other side. it will
>> graph
>>> out latency, drops, ect.
>>> not as robust as ip sla, but it works if all your looking for is packet
>> loss
>>> measurement.
>>>
>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>
>>
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>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net