[arin-ppml] ARIN Draft Policy 2011-5: Shared Transition Space

[William Herrin]

On Tue, Jul 5, 2011 at 5:13 PM, Owen DeLong <owen at delong.com> wrote:
> On Jul 5, 2011, at 2:01 PM, William Herrin wrote:
>> 2. Router interface numbering is a potential use case. Filtering of
>> RFC1918 is too widespread to overcome, so using it outside the NAT
>> breaks path MTU detection. That's not inherently true of this new
>> space and nonfiltering could be encouraged in a way that renders it
>> usable in a few years.
>
> Not really... How would you know which ISP to route the packet
> back to?

Hi Owen,

You don't care. The packets you care about receiving from the router
are ICMP type 3 (destination unreachable) and ICMP type 11 (time
exceeded) . Those flow only one direction -- from the router back
towards you.

Regards,
Bill Herrin



-- 
William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
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