From: Jamie Lokier <jamie@shareable.org>
To: bert hubert <ahu@ds9a.nl>, "David S. Miller" <davem@redhat.com>,
Stephen Hemminger <shemminger@osdl.org>,
netdev@oss.sgi.com, linux-net@vger.kernel.org,
linux-kernel@vger.kernel.org, ALESSANDRO.SUARDI@ORACLE.COM
Subject: Re: preliminary conclusions regarding window size issues
Date: Thu, 8 Jul 2004 02:44:43 +0100 [thread overview]
Message-ID: <20040708014443.GE17266@mail.shareable.org> (raw)
In-Reply-To: <20040707232757.GA14471@outpost.ds9a.nl>
bert hubert wrote:
> Alessandro never sees these packets!
...
> My current feeling is that some kind of QoS device is interfering,
> and that the 'wscale gets stuffed' theory is wrong in this case.
>
> I recall that 'Packeteer' QoS devices try to mess with windows.
It's a bit fiddly to arrange, but can you repeat the test and
artificially lower the TTL for these packets which disappear?
An iptable mangle rule would do the trick -- mangle the TTL only on
packets which match this point in the trace.
The idea is to reduce the TTL like traceroute does, so you can see
which hop is causing these packets to disappear -- perhaps it'll stand
out proudly as a QoS device which can be named, blamed and shamed.
-- Jamie
next prev parent reply other threads:[~2004-07-08 1:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-07 23:27 preliminary conclusions regarding window size issues bert hubert
2004-07-08 1:44 ` Jamie Lokier [this message]
2004-07-08 6:03 ` bert hubert
2004-07-08 6:37 ` window tracking firewall involved, was: " bert hubert
2004-07-08 15:37 ` David S. Miller
2004-07-08 16:34 ` Martin Josefsson
2004-07-08 21:57 ` Redeeman
2004-07-09 20:24 ` bert hubert
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040708014443.GE17266@mail.shareable.org \
--to=jamie@shareable.org \
--cc=ALESSANDRO.SUARDI@ORACLE.COM \
--cc=ahu@ds9a.nl \
--cc=davem@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-net@vger.kernel.org \
--cc=netdev@oss.sgi.com \
--cc=shemminger@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).