Common operational misconceptions

Jack Bates jbates at
Fri Feb 17 15:48:21 UTC 2012

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."


More information about the NANOG mailing list