The following reply was made to PR kern/139204; it has been noted by GNATS.
From: Nikolai Saoukh <nikolai.sao...@gmail.com>
To: bug-follo...@freebsd.org
Cc:
Subject: Re: kern/139204: [arp] DHCP server replies rejected, ARP entry lost
before max_age
Date: Sat, 10 Oct 2009 13:25:46 +0400
> I'm going to make a guess that this is ARP-related, based on a comment
> in the PR.
After some inspection I think the problem is in /sbin/dhclient.
Patch in PR bin/96018 introduced unicast REQUESTs. That requests are
sent from random port (not from bootpc (68)), thus defeating bpf
filter in dhclient for replies. Moreover when there are two or more
interfaces on the same network, that requests can be transmitted from
another interface (with different ethernet address). IP packet with
the same IP number (but changed ethernet address) confuse ARP
machinery.
See also PR ports/139405.
IMHO, category, severity, ... of this PR should be edited.
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