North American Network Operators Group
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Re: RTT from NY to New Delhi?

  • From: Chris L. Morrow
  • Date: Wed May 16 10:29:57 2007 

On Wed, 16 May 2007, Eric Gauthier wrote:

>
> Heya,
>
> > What should I expect?
> >
> > I am seeing ~350 from a vendor provided mpls cloud to a site in
> >
> > Sukhrali Chowk, Gurgaon, Haryana, India
>
> We just did a video conference between Boston and New Delhi, via NYC, and
> we were seeing around 250ms.  However, VSNL was QoS'ing our traffic across
> their backbone, so I'd expect normal traffic to take a bit longer.  When
> we originally investigated this, we were expecting to see around 300ms to
> 350ms.

hrm, qos doesn't necessarily mean longer RTT, it means preference in
(tight/busy/hot) paths, right? So... if VNSL's network along your path is
oc-48 with only 1mbps of traffic on it and you are taking only 1mbps more
... probably there isn't any change, yes? If it's a 1mbps path and you are
taking 1mbps then... other folks get starved out and potentially get
longer RTT.

(just trying to clarify the QOS boogie-man)