Is it safe to use 240.0.0.0/4

Wed Jun 17 21:21:17 UTC 2015

Cisco IOS-XE Fails
ip add 241.1.1.1 255.255.255.0
Not a valid host address - 241.1.1.1
ip route 241.0.0.0 255.0.0.0 10.10.10.1
%Invalid destination prefix
XR-OS : fails
Can take the IP on a interface, but cant route it
IOS fails

we used up all the reserved ip blocks including the 169.254 and the
benchmark, and the 100.64/10 and ofcourse the RFC1918.
Lots of apps don't do ipv6 so we are finding interim solution...i guess
that's karma since doing so sort of anti-facilitating the use of ipv6 :)

On Wed, Jun 17, 2015 at 5:12 PM, Ca By <cb.list6 at gmail.com> wrote:

> 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.
>