[96387] in North American Network Operators' Group
Re: barak-online.net icmp performance vs. traceroute/tcptraceroute, ssh, ipsec
daemon@ATHENA.MIT.EDU (Jo Rhett)
Mon May 7 13:56:19 2007
In-Reply-To: <463E7BC5.2050107@ttec.com>
Cc: "Steven M. Bellovin" <smb@cs.columbia.edu>,
Lincoln Dale <ltd@interlink.com.au>, "'nanog'" <nanog@merit.edu>
From: Jo Rhett <jrhett@svcolo.com>
Date: Mon, 7 May 2007 10:55:06 -0700
To: Joe Maimon <jmaimon@ttec.com>
Errors-To: owner-nanog@merit.edu
On May 6, 2007, at 6:07 PM, Joe Maimon wrote:
> Of course, and thats why I have cut down ip mtu and tcp adjust mss
> and all the rest.
> Not making much of a difference.
Um.. sorry if you mean more than you said, but where did you cut down
the TCP MTU? If you did it on your routers, then you are creating
or at least complementing the problem.
The only way to make smaller MTUs work is to alter the MTU on both
the origin and destination systems. Altering the MTU anywhere along
the path only breaks things.
--
Jo Rhett
senior geek
Silicon Valley Colocation
Support Phone: 408-400-0550
