RTT from NY to New Delhi?
constantinegi at corp.earthlink.net
Wed May 16 15:33:15 UTC 2007
Seems pretty damned reasonable to me considering the shortest
distance between these two locations is a little less than 14,000
kilometers. Given the speed of light through glass, a convoluted
fiber path, quite a few O/E - E/O conversions (EDFAs will only get
you so far), and several switches, a 350ms RTT is decent.
Removing the gear and assuming an impossibly direct fiber path, would
still give an RTT of about 140ms.
Gian Anthony Constantine
On May 16, 2007, at 10:59 AM, Marshall Eubanks wrote:
> On May 16, 2007, at 10:35 AM, Tim Franklin wrote:
>> On Wed, May 16, 2007 2:20 pm, Joe Maimon wrote:
>>> What should I expect?
>>> I am seeing ~350 from a vendor provided mpls cloud to a site in
>>> Sukhrali Chowk, Gurgaon, Haryana, India
>> Seems not-unreasonable. I remember getting about 150ms or 250ms from
>> London to Gurgaon depending on whether we were on the straight-across
>> cable or the round-the-bottom cable. (Sorry, both my geography
>> and my
>> cable-names are hazy).
> The best recent data I have is from Bangalore to Tyco Road in
> Virginia through VSNL and Cogent.
> Here is a sample (this goes through San Jose) :
> Mon Mar 5 05:26:21 EST 2007
> from Bangalore through the VSNL network
> --- 188.8.131.52 ping statistics ---
> 10 packets transmitted, 10 packets received, 0% packet loss
> round-trip min/avg/max/stddev = 285.495/319.649/395.330/38.576 ms
> 370 ms seems a little high but not unreasonable.
> Marshall Eubanks
>> Going east from NY, you'd add 70 or 80ms to that - and a quick look
>> suggests routes going west instead. (Test from home to .IN NS
>> goes London
>> -> NY -> West Coast -> Singtel -> India, for ~370ms)
>> It's starting to head a bit towards walkie-talkie mode for VoIP,
>> but not
>> too bad other than that...
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