[172581] in North American Network Operators' Group
Re: Help with route latency between TATA and Comcast
daemon@ATHENA.MIT.EDU (joel jaeggli)
Tue Jun 24 14:29:48 2014
X-Original-To: nanog@nanog.org
Date: Tue, 24 Jun 2014 11:28:49 -0700
From: joel jaeggli <joelja@bogus.com>
To: Robert Webb <rwebb@ropeguru.com>, nanog@nanog.org
In-Reply-To: <web-163772@mail.ropeguru.com>
Errors-To: nanog-bounces@nanog.org
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On 6/24/14 10:49 AM, rwebb@ropeguru.com wrote:
> I am doing some testing between my Comcast Business connection and a
> Singapore server that I have just setup. I am seeing high latency to th=
e
> server but it appears it is the Comcast to TATA link and not the link
> between the U.S. and Singapore. At least that is what I can gather from=
> the reverse lookup in the traceroute.
given that the latency to hop 9 is basically the same as hop14 you're
looking at mpls...
if the transpacific hop were on top of that you'd see at least another
100 ms added to the rtt between 9 and 11.
it's 9655 miles IAD - SIN over the pole, realistically an actually fiber
paths is likely more than 12000 so you'd expect to see ~more than 150ms
rtt under the best circumstances...
> Can someone please enlighten me as to if I am correct or not?
>=20
> Tracing route to 128.199.162.241 over a maximum of 30 hops
>=20
> 1 <1 ms <1 ms <1 ms 192.168.1.254
> 2 1 ms <1 ms <1 ms
> 23-25-112-190-static.hfc.comcastbusiness.net [23.25.xxx.xxx]
> 3 27 ms 22 ms 19 ms 96.178.10.1
> 4 10 ms 9 ms 10 ms
> te-1-3-ur01.shadygrove.va.richmond.comcast.net [68.86.124.241]
> 5 17 ms 17 ms 17 ms
> xe-12-0-1-0-ar02.charlvilleco.va.richmond.comcast.net [68.86.172.17]
> 6 24 ms 24 ms 25 ms
> pos-1-2-0-0-cr01.ashburn.va.ibone.comcast.net [68.86.91.53]
> 7 24 ms 23 ms 23 ms
> pos-0-3-0-0-pe01.ashburn.va.ibone.comcast.net [68.86.86.142]
> 8 20 ms 20 ms 20 ms 66.208.233.38
> 9 268 ms 264 ms 265 ms if-6-8.tcore2.lvw-los-angeles.as6453.net=
> [216.6.87.114]
> 10 * * * Request timed out.
> 11 270 ms 255 ms 256 ms if-2-2.tcore1.svw-singapore.as6453.net
> [180.87.12.1]
> 12 270 ms 271 ms 275 ms if-11-2.thar1.svq-singapore.as6453.net
> [180.87.98.37]
> 13 260 ms 258 ms 260 ms 180.87.98.6
> 14 256 ms 256 ms 258 ms 103.253.144.242
> 15 262 ms 258 ms 259 ms 128.199.162.241
>=20
> Trace complete.?
>=20
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