nanog mailing list archives

Re: Common operational misconceptions


From: "Justin M. Streiner" <streiner () cluebyfour org>
Date: Thu, 16 Feb 2012 16:02:29 -0500 (EST)

On Thu, 16 Feb 2012, Wayne E Bouchard wrote:

Or more to the point, it is a misconception that traffic is
symetrical (the path out and the path back are the same) whereas in
the present network, symetrical paths are the exception rather than
the rule, especially as your radius increases.

To add to that, I feel pretty sure in stating that many of the people on this list, at one point or another, have either had people tell them that asymmetric routing is "bad", or have had to explain why asymmetric routing across 'the Internet' is not "bad", even if it can make troubleshooting a 'network problem' somewhat more involved. The path from A to B is not necessarily the same as the path from B to A.

jms


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