[systemd-devel] systemd-network and loopback

[Greg Oliver]

On Fri, Sep 9, 2022 at 10:40 AM Andrea Pappacoda <andrea at pappacoda.it> wr

> Il giorno ven 9 set 2022 alle 17:37:14 +02:00:00, Lennart Poettering
> <lennart at poettering.net> ha scritto:
> > People sometimes route stuff onto the loopback device in addition to
> > the the usual 127.0.0.0/8 traffic so that it ends up on local sockets.
>
> Thanks for the reply, but I don't fully understand the implications of
> this, nor how sd-network is related - I'm quite ignorant when it comes
> to networking :/
>

Well, easiest to explain is user apps that use tcp or udp sockets to
communicate.  If they are on the same host, then huge gains can be achieved
by using the loopback adapter (especially TCP comms).

You should google search for loopback MTUs..
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