From: David Miller <davem@davemloft.net>
To: fw@strlen.de
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH -next crap] net: icmp: work around bogus pmtu errors
Date: Tue, 14 Jul 2015 15:40:09 -0700 (PDT) [thread overview]
Message-ID: <20150714.154009.1071789496366560900.davem@davemloft.net> (raw)
In-Reply-To: <1436572609-2097-1-git-send-email-fw@strlen.de>
From: Florian Westphal <fw@strlen.de>
Date: Sat, 11 Jul 2015 01:56:49 +0200
> sometimes tcp connections seem to hang.
> tcpdump shows broken path mtu reports. This "fix" avoids hang and gives:
>
> [633.327834] icmp: 192.0.0.2 reports mtu 1474 for packet size 1474 to host 204.236.132.12
> [635.586945] icmp: 192.0.0.2 reports mtu 1474 for packet size 1474 to host 54.219.255.254
> [647.106708] icmp: 192.0.0.2 reports mtu 1474 for packet size 1466 to host 204.236.132.12
> [663.084586] icmp: 192.0.0.2 reports mtu 1474 for packet size 1466 to host 54.219.255.254
>
> sigh.
>
> Signed-off-by: Florian Westphal <fw@strlen.de>
> ---
> Might be caused by DS-LITE. I either need the turd below or iptables TCPMSS
> mangling rules to artificially lower received mss.
>
> I don't mind if this is rejected; I'm mostly wondering if anyone
> else came across suprise like this.
I think the culprit should be identified and fixed ASAP, the last thing we want
is for every system add a hack like this.
prev parent reply other threads:[~2015-07-14 22:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 23:56 [PATCH -next crap] net: icmp: work around bogus pmtu errors Florian Westphal
2015-07-14 22:40 ` David Miller [this message]
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=20150714.154009.1071789496366560900.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=fw@strlen.de \
--cc=netdev@vger.kernel.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).