nanog mailing list archives
Re: RTT from NY to New Delhi?
From: Gian Constantine <constantinegi () corp earthlink net>
Date: Wed, 16 May 2007 11:33:15 -0400
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, IndiaSeems not-unreasonable. I remember getting about 150ms or 250ms from London to Gurgaon depending on whether we were on the straight-acrosscable or the round-the-bottom cable. (Sorry, both my geography and mycable-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 --- 63.105.122.1 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. Regards Marshall EubanksGoing east from NY, you'd add 70 or 80ms to that - and a quick looksuggests 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 nottoo bad other than that... Regards, Tim.
Current thread:
- RTT from NY to New Delhi? Joe Maimon (May 16)
- Re: RTT from NY to New Delhi? Justin M. Streiner (May 16)
- Re: RTT from NY to New Delhi? Mike Hammett (May 16)
- Re: RTT from NY to New Delhi? Joe Maimon (May 16)
- Re: RTT from NY to New Delhi? Eric Gauthier (May 16)
- Re: RTT from NY to New Delhi? Chris L. Morrow (May 16)
- Re: RTT from NY to New Delhi? Justin M. Streiner (May 16)
- Re: RTT from NY to New Delhi? Robert Baxter (May 16)
- Re: RTT from NY to New Delhi? Tim Franklin (May 16)
- Re: RTT from NY to New Delhi? Marshall Eubanks (May 16)
- Re: RTT from NY to New Delhi? Gian Constantine (May 16)
- Re: RTT from NY to New Delhi? Stephen Sprunk (May 16)
- Re: RTT from NY to New Delhi? Marshall Eubanks (May 16)
- Re: RTT from NY to New Delhi? John Payne (May 16)
- Re: RTT from NY to New Delhi? Steven M. Bellovin (May 16)
- Re: RTT from NY to New Delhi? Joe Maimon (May 16)
- Re: RTT from NY to New Delhi? Justin M. Streiner (May 16)