[96399] in North American Network Operators' Group
Re: barak-online.net icmp performance vs. traceroute/tcptraceroute, ssh, ipsec
daemon@ATHENA.MIT.EDU (Adrian Chadd)
Mon May 7 21:56:52 2007
Date: Tue, 8 May 2007 09:55:25 +0800
From: Adrian Chadd <adrian@creative.net.au>
To: Joe Maimon <jmaimon@ttec.com>
Cc: 'nanog' <nanog@merit.edu>
In-Reply-To: <463FD641.1060900@ttec.com>
Errors-To: owner-nanog@merit.edu
On Mon, May 07, 2007, Joe Maimon wrote:
>
>
>
> Joe Maimon wrote:
>
> >
> >
> >This is obviously not best effort. Best guess would be "managed
> >bandwidth" differentiated by ip ranges and that the "change" was a
> >different pool assignment.
> >
> >I suspect the stellar icmp echo performance is also intentional.
>
> Or it could just be some QOS policing/shaping.
How asymmetric is the link? I've noticed quite dramatic differences when
configuring even basic policy maps with WRED on DSL TX-side on CPE (ie,
the small sized pipe upstream from client to ISP.)
I can't (normally) control what the ISP is sending to me*, but I can
try to make the best of the situation. And it can allow pipes to be
almost fully utilised without massive performance drop-offs at the
top end.
Adrian
* except in instances where I also run the ISP network..
