[77657] in North American Network Operators' Group
Re: Rapidly-variable routing on the time scale of seconds to minutes?
daemon@ATHENA.MIT.EDU (John Fraizer)
Mon Jan 31 08:22:11 2005
Date: Mon, 31 Jan 2005 08:21:25 -0500
From: John Fraizer <nanog@enterzone.net>
To: Charles Shen <charles@cs.columbia.edu>, nanog@merit.edu
In-Reply-To: <021701c50776$1c7da9a0$37413b80@ccs>
Errors-To: owner-nanog-outgoing@merit.edu
Charles Shen wrote:
> An example traceroute record containing the fluttering is shown below (see
> the 5th hop)
>
> Fri Apr 09 09:35:35 2004
>
> 1 cisfhfb.fh-friedberg.de (212.201.24.1) 1.095 ms 0.402 ms 0.321 ms
> 2 ar-frankfurt2.g-win.dfn.de (188.1.42.9) 120.105 ms 198.766 ms 200.040
> ms
> 3 cr-frankfurt1-ge5-0.g-win.dfn.de (188.1.80.1) 2.093 ms 2.142 ms 2.087
> ms
> 4 so-6-0-0.ar2.FRA2.gblx.net (208.48.23.141) 2.461 ms 2.349 ms 2.333 ms
> 5 pos5-0-2488M.cr2.FRA2.gblx.net (67.17.65.53) 2.448 ms
> pos6-0-2488M.cr1.FRA2.gblx.net (67.17.65.77) 2.368 ms 2.281 ms
That sure looks like ECM to me. Equal Cost Multi-Path. This is NOT
anything new. What's the big deal?
> 6 so3-0-0-2488M.ar2.FRA3.gblx.net (67.17.65.82) 2.676 ms 2.750 ms
> so2-0-0-2488M.ar2.FRA3.gblx.net (67.17.65.58) 2.569 ms
Same here.
--
John Fraizer
