[150281] in North American Network Operators' Group
Re: Common operational misconceptions
daemon@ATHENA.MIT.EDU (Masataka Ohta)
Mon Feb 20 17:55:41 2012
Date: Tue, 21 Feb 2012 07:53:24 +0900
From: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
To: George Bonser <gbonser@seven.com>
In-Reply-To: <596B74B410EE6B4CA8A30C3AF1A155EA09CD6CC2@RWC-MBX1.corp.seven.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
George Bonser wrote:
> Must be magic then, because it works for me.
Yes, but magicians always use tricks.
> I've got a few dozen servers with MTU 7500 that aren't
> having a bit of trouble talking to anyone.
Your trick is that your routers at the border between MTUs
7500 and 1500 (or maybe, 1400 or so) generate ICMP packet
too big packets to your servers and no intermediate
entities filter them, isn't it?
Masataka Ohta
