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Date:      Tue, 5 Apr 2011 17:31:45 +0200 (CEST)
From:      Ingo Flaschberger <if@freebsd.org>
Cc:        Nikolay Denev <ndenev@gmail.com>, freebsd-net@freebsd.org
Subject:   Re: Routing enhancement - reduce routing table locking
Message-ID:  <alpine.LRH.2.00.1104051731080.2152@filebunker.xip.at>
In-Reply-To: <alpine.LRH.2.00.1104051615160.2152@filebunker.xip.at>
References:  <alpine.LRH.2.00.1104050303140.2152@filebunker.xip.at> <E0E87D94-3DE3-4884-8FBB-CC778486C364@gmail.com> <alpine.LRH.2.00.1104051615160.2152@filebunker.xip.at>

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>> Can you say something more about :
>>    "implement some multipath changes to use a direct attached
>>      interface route and a real route, used some OpenBSD code"
>> 
>> I've looked at the patch but it's not obvious to me.
>> 
>> P.S.: I've just saw your reply to kern/155772 and was wondering if this 
>> patch can help.
>
> regarding kern/155772:
> at stock 8.2 FreeBSD the system panics after ifconfig down / ifconfig up / 
> ifconfig down with 1 route and 1 interface route (multipath).
>
> Also there are problems with arp, due wrong multipath route selection
> (if the decision is already made that the route should go the direct way, the 
> route and not the interface route is choosen, depends on which route was 
> first in the tree).

see "in_lltable_rtcheck"

> And finally, there are problems when adding / deleteing routes.
>
> example that does not work:
> ifconfig em0 192.168.0.1/24
> ifconfig em1 10.0.0.1/24
> route add 10.0.0.0/24 192.168.0.2
>
> example that currently works with 8.2:
> ifconfig em0 192.168.0.1/24
> ifconfig em1 10.0.0.1/24
> route add 172.16.0.0/24 192.168.0.2
> route add 172.16.0.0/24 10.0.0.2
>
> Kind regards,
> 	Ingo Flaschberger
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