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Date:      Wed, 6 Feb 2008 18:21:42 +0300
From:      Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To:        Josef Pojsl <jp@tns.cz>
Cc:        freebsd-net@freebsd.org
Subject:   Re: ospf cost and route selection (openospfd)
Message-ID:  <jV/l2UkZT%2BCCNuE6npJv1SBs5CE@UCvaDHSF%2BGDEPQ7TSpdR%2BlgUSQM>
In-Reply-To: <20080206144104.GL1122@bonifac.tns.cz>
References:  <20080206144104.GL1122@bonifac.tns.cz>

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Josef, good day.

Currently I can not answer your question, sorry.  I just have the
remark.

Wed, Feb 06, 2008 at 03:41:04PM +0100, Josef Pojsl wrote:
> ospfctl show rib:
> Router 1:
> Destination          Nexthop           Path Type    Type      Cost    Uptime  
> 0.0.0.2              10.31.2.2         Intra-Area   Router    20      00:03:51
> 10.30.1.2/32         10.31.2.2         Intra-Area   Network   40      00:03:41
> 10.31.1.2/32         10.31.2.2         Intra-Area   Network   70      00:03:51

'Cost' column looks perfectly correct: in order to reach the other
router, the path with cost 20 is selected (presumably, WAN X); path
to 10.30.1.2/32 costs 20+20: 20 from WAN X interface and 20 from
the gre30 on the other end; and path to 10.31 costs 70=20+50,
WAN X + gre31 on the other end.

The only weird thing is the nexthop value.  Your 'netstat -rn' shows
routes via gre31 too?  If yes, maybe the verbose mode of the openospfd
(-v) will show something interesting?
-- 
Eygene



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