BCP38 exceptions for RFC1918 space

William Herrin bill at herrin.us
Mon Aug 16 06:05:14 UTC 2010

On Mon, Aug 16, 2010 at 1:49 AM, Marco Hogewoning <marcoh at marcoh.net> wrote:
> On 15 aug 2010, at 20:05, Randy Bush wrote:
>> rfc1918 packets are not supposed to reach the public internet.  once you
>> start accommodating their doing so, the downward slope gets pretty steep
>> and does not end in a nice place.
> I cannot agree more with this. If you want PMTU use
>non-private space, there is enough really :) And saving
> a /24 by renumbering your core into RFC 1918 won't
> save you from the coming run out.

I once suggested something along the lines of:

interface Loopback0
  ip address
interface GigabitEthernet0/0
  ip address
  icmp errors-from Loopback0

But I was yelled at for trying to break traceroute.

Bill Herrin

William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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