From: Fernando Gont <fgont@si6networks.com>
Subject: Re: Use IPv6 /128 instead of /64 for PPP interfaces
To: Denis Fondras <denis@openbsd.org>, tech@openbsd.org
Date: Sun, 17 Nov 2024 15:35:53 -0300



On 16/11/24 15:50, Denis Fondras wrote:
> While working on IPv6 for pppd(8), I tried to use the EUI64 address as the PPP
> local address and failed because the kernel does not allow to change the netmask
> from /64 to /128.

Note: EUI64 assumes you are using... a /64 subnet.

OTOH, RFC7217 (which can/should be used for link-locals, too) does not 
have this limitation.

Thanks,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: F242 FF0E A804 AF81 EB10 2F07 7CA1 321D 663B B494