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Date:      Tue, 15 Oct 1996 13:33:23 -0700
From:      David Greenman <dg@root.com>
To:        Julian Elischer <julian@whistle.com>
Cc:        Brian Candler <B.Candler@pobox.com>, bugs@FreeBSD.org, nato-ws@ripe.net, t12@psg.com
Subject:   Re: IP bugs in FreeBSD 2.1.5 
Message-ID:  <199610152033.NAA03243@root.com>
In-Reply-To: Your message of "Tue, 15 Oct 1996 12:54:36 PDT." <3263EBFC.1CFBAE39@whistle.com> 

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>> 1. On several occasions we found that although a default route appeared to
>> be in the kernel forwarding table (as shown by netstat -nr), it did
>> not work. However simply by deleting and reinserting the exact same
>> default route, it then worked fine. I'm afraid I can't give you
>> a set of circumstances which can cause this problem to be
>> reproduced.
>> 
>possibly another route preceeded it in some way 
>I can imagine such a case but can't quite put my finger on  a
>mechanism.

   He likely had a clone route. This would only show up with netstat -rna. It
would also be deleted automatically if he deleted the default route. This
isn't a bug, but it is useful to understand how this all works so that you
can be prepared for the behavior.

>> 5. On one occasion the kernel forwarding table had a bad entry (I
>> think a "link #1" type entry) which could not be removed, apart from
>> by rebooting the machine.
>> 
>
>sorry, no idea

   That would be an arp entry. He probably had an outstanding arp request that
wasn't satisfied.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project



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