[arin-ppml] Change of Use and ARIN (was: Re: AFRINIC And The Stability Of The Internet Number Registry System)

William Herrin bill at herrin.us
Mon Sep 13 16:06:51 EDT 2021


On Mon, Sep 13, 2021 at 12:57 PM Fernando Frediani <fhfrediani at gmail.com> wrote:
> How would it be possible that something marked as *Future* Use be
> blocked at the firmware level on any network equipment ?

Hi Fernando,

In network equipment the line between software and firmware is blurry
at best. A lot of network software blocks assignment of addresses in
240/4 to interfaces.

e.g. in Linux:

ifconfig lo:1 240.0.0.1 netmask 255.255.255.255
SIOCSIFADDR: Invalid argument
SIOCSIFFLAGS: Cannot assign requested address
SIOCSIFNETMASK: Cannot assign requested address

but
ip addr add 240.0.0.1/32 dev lo

works.

Regards,
Bill Herrin

-- 
William Herrin
bill at herrin.us
https://bill.herrin.us/


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