[149999] in North American Network Operators' Group
Re: Common operational misconceptions
daemon@ATHENA.MIT.EDU (Jack Bates)
Fri Feb 17 10:49:35 2012
Date: Fri, 17 Feb 2012 09:48:21 -0600
From: Jack Bates <jbates@brightok.net>
To: Steve Clark <sclark@netwolves.com>
In-Reply-To: <4F3E6FE1.7030607@netwolves.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2/17/2012 9:18 AM, Steve Clark wrote:
> Having worked with many people over the last 40 years, the good trouble
> shooters understood how things
> were suppose to work. This helps immeasurably in determining where to
> start looking.
>
Ran into this not too long ago with a transport problem. The behavior I
was seeing was indicative of the transport not stripping their outer
tag. They put wireshark on a windows laptop and sent me the traffic
captures. While I didn't know that M$ decided to do something silly like
removing a single tag, all indicators were that the M$ stack "fixed"
whatever was broken prior to wireshark. We took a capture from another
device and proved the problem.
Which is a common transport problem I often see, "Our configuration
looks right, it must be on your end."
Jack
