[128744] in North American Network Operators' Group
Re: BCP38 exceptions for RFC1918 space
daemon@ATHENA.MIT.EDU (Florian Weimer)
Sun Aug 15 13:03:00 2010
From: Florian Weimer <fw@deneb.enyo.de>
To: Valdis.Kletnieks@vt.edu
Date: Sun, 15 Aug 2010 19:02:50 +0200
In-Reply-To: <69096.1281891438@localhost> (Valdis Kletnieks's message of "Sun,
15 Aug 2010 12:57:18 -0400")
Cc: nanog@merit.edu
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
* Valdis Kletnieks:
> On Sun, 15 Aug 2010 18:46:49 +0200, Florian Weimer said:
>
>> > And that connection that's trying to use PMTU got established across the
>> > commodity internet, how, exactly? ;)
>>
>> ICMP "fragmentation needed, but DF set" messages carry the a addresses
>> of intermediate routers which generate them (potentially in response
>> to MTU drops) as source addresses, not the IP addresses of the peers
>> in a connection.
>
> If any long-haul carriers are originating ICMP packets for other people's
> consumption from 1918 addresses rather than addresses in their address space,
> it's time to name-n-shame so the rest of us can vote with our feet and
> checkbooks. There's no excuse for that in this day and age.
What does "originating" mean? Creating the packets? Or forwarding
them?
