[93731] in North American Network Operators' Group
Re: Best networks with international presence..
daemon@ATHENA.MIT.EDU (Joe Abley)
Mon Dec 18 14:50:56 2006
In-Reply-To: <4586CA18.4040904@uoregon.edu>
Cc: Drew Weaver <drew.weaver@thenap.com>, nanog@merit.edu
From: Joe Abley <jabley@ca.afilias.info>
Date: Mon, 18 Dec 2006 14:49:44 -0500
To: Joel Jaeggli <joelja@uoregon.edu>
Errors-To: owner-nanog@merit.edu
On 18-Dec-2006, at 12:04, Joel Jaeggli wrote:
> Drew Weaver wrote:
>> I am looking for opinions of what US carriers have the best
>> connectivity with the international players such as teleglobe, etc.
>> Mainly, we are trying to determine if there is any way for us to get
>> less latency from teleglobe's customers to our network (we
>> currently see
>> something like 1100 ms in teleglobe's london POP in traceroutes
>> from our
>> customers to our network).
>
> You sure the cpu on the teleglobe router in the path isn't just
> pegged?
> If the rtt for the whole path is 400ms but one hop in the middles
> shows
> 1100ms you're probably measuring the performance of the scheduler
> in the
> OS the router is running not rtt to and from that router, packets
> going
> through it rather than to it likely take a different path through
> the box.
>
> Of course if the customer's rtt is 1100+ ms then sure there's probably
> serious congestion on one of those links.
Or the return path from that router is asymmetric, and involves a few
congested hops into space and back. Teleglobe has customers in many
parts of the world where such things are not so unusual.
Joe
