[Bug 256393] Issue with recreation of ppp/tun interfaces

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 06 Jun 2021 14:36:21 UTC

--- Comment #28 from Rodney W. Grimes <rgrimes@FreeBSD.org> ---
(In reply to Eugene Grosbein from comment #27)
> No, no, I was thinking about incoming ICMP echo replies delivery. Some external resource is checked by its IP address, of course. Not even remote IP of PPP interface if we need to check global connectivity - we ping some global resource with source IP of distinct link.

How would that in any way involve any loopback route????  You seem to be
confused on exactly when these loopback routes come into play.  An incoming
ICMP echo reply is going to be picked off as "to this host" at ip_input
processing and the route table wont even be looked at.

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