netdev - Re: ipv6 ::1 and lo dev

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Message-ID: <fb3e3ad3-7bc3-9420-d3f6-e9bae91f4cd@tarent.de>
Date:   Wed, 18 Aug 2021 19:47:37 +0200 (CEST)
From:   Thorsten Glaser <t.glaser@...ent.de>
To:     Oleg <lego12239@...dex.ru>
cc:     netdev@...r.kernel.org
Subject: Re: ipv6 ::1 and lo dev

On Wed, 18 Aug 2021, Oleg wrote:

> I try to replace ::1/128 ipv6 address on lo dev with ::1/112 to
> access more than 1 address(like with ipv4 127.0.0.1/8). But i get

AIUI this is not possible in IPv6, only :: and ::1 are reserved,
the rest of ::/96 is IPv4-compatible IPv6 addresses.

I never understood why you’d want more than one address for loopback
anyway (in my experience, the more addresses a host has, the more
confused it’ll get about which ones to use for what).

bye,
//mirabilos
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