16 Aug
2010
16 Aug
'10
1:49 a.m.
On 15 aug 2010, at 20:05, Randy Bush wrote:
What's the current consensus on exempting private network space from source address validation? Is it recommended? Discouraged?
(One argument in favor of exceptions is that it makes PMTUD work if transfer networks use private address space.)
and this is a good thing?
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. MarcoH