On Wed, Jun 17, 2015 at 2:07 PM, Luan Nguyen <lnguyen at opsource.net> wrote: > Is that safe to use internally? Anyone using it? > Just for NATTING on Cisco gears... > most things, including most cisco gear, will not forward those Class E packets or accept Class E as a valid address If you have success, please report it to the list.