[190554] in North American Network Operators' Group
Re: packet loss question
daemon@ATHENA.MIT.EDU (William Herrin)
Fri Jul 8 12:51:17 2016
X-Original-To: nanog@nanog.org
X-Really-To: <nanog@nanog.org>
In-Reply-To: <20160708130919.GI18345@sizone.org>
From: William Herrin <bill@herrin.us>
Date: Fri, 8 Jul 2016 12:50:47 -0400
To: Ken Chase <math@sizone.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Fri, Jul 8, 2016 at 9:09 AM, Ken Chase <math@sizone.org> wrote:
> And we know the whole internet observes handling
> mtu discovery properly
> and doesnt just firewall all ICMP because 'hackers'.
>
> (OP's issue may well be MTU discovery, esp if he's on
> broadband. Don't have
> enough details. I just solved this exact problem a couple
> weeks ago for a
> client with an UBNT ERX by turning on it's MTU hacking
> feature. Sites that
> engaged in ICMP mtu blocking included cnn.com.)
Heh. And because life isn't interesting enough, Amazon AWS has started
defaulting their larger VMs to a 9001 byte interface MTU.
> I meant routers are allowed to drop ICMP request
> packets to themselves, not
> the packets to be transitted. I wasnt clear.
I think you really meant echo-request packets to themselves, right? ;)
Regards,
Bill Herrin
--
William Herrin ................ herrin@dirtside.com bill@herrin.us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
