[191743] in North American Network Operators' Group
Re: Request for comment -- BCP38
daemon@ATHENA.MIT.EDU (John Levine)
Mon Sep 26 14:10:32 2016
X-Original-To: nanog@nanog.org
Date: 26 Sep 2016 18:03:55 -0000
From: "John Levine" <johnl@iecc.com>
To: nanog@nanog.org
In-Reply-To: <CAO1bj=bQE_4YvefVcPSio_TCezWMd8NwPSjdmsJT1spSHftwhQ@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org
>>>
>>> If you have links from both ISP A and ISP B and decide to send traffic
>>> out ISP A's link sourced from addresses ISP B allocated to you, ISP A
>>> *should* drop that traffic on the floor.
>
>> This is a legitimate and interesting use case that is broken by BCP38.
>
>I don't agree that this is legitimate.
>
>Also we're talking about typical mom & pop home users here.
There are SOHO modems that will fall back to a second connection if
the primary one fails, but that's not what we're talking about here.
The customers I'm talking about are businesses large enough to have
two dedicated upstreams, and a chunk of address spaced SWIP'ed from
each. Some run BGP but I get the impression as likely as not they
have static routes to the two upstreams.
For people who missed it the last time, I said $50K/mo, not $50/mo. Letters matter.
R's,
John
