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Date:      Fri, 04 Sep 1998 08:11:06 +0100 (BST)
From:      Duncan Barclay <dmlb@ragnet.demon.co.uk>
To:        "Matthew D. Fuller" <fullermd@futuresouth.com>
Cc:        current@FreeBSD.ORG, Greg Lehey <grog@lemis.com>
Subject:   Re: NFS stable before release?
Message-ID:  <XFMail.980904081106.dmlb@computer.my.domain>
In-Reply-To: <19980903192610.36464@futuresouth.com>

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On 04-Sep-98 Matthew D. Fuller wrote:
> (trim, CC's, trim!)
> 
> On Fri, Sep 04, 1998 at 09:39:49AM +0930, Greg Lehey woke me up to tell me:
>> 
>> I haven't been able to use NFS between two specific systems for about
>> two months now.  It seems to be related to mount: mounts will only
>> succeed about one time out of three.  If they don't succeed, a second
>> attempt will invariably hang the machine.  It's unrelated to the
>> system running on the client machine (2.2.[567] or -CURRENT), and
>> other machines can mount on the server machine with no problems.  I've
>> tried changing just about everything on the client machine, including
>> the Ethernet board, but the problem remains.  About the only thing I
>> could think of is the cable length between the machines, but that
>> hasn't changed.  I've done some tcpdump traces which show that the
>> server is returning a "port not reachable" error, but I haven't had
>> time to follow all the way through the stack.  If anybody has some
>> ideas on this one, I'd be really pleased to help fix it.
> 
> I had this problem a good bit a while back.
> Not quite sure how I solved it...  but it was one of these
> A) portmapper problem; kill and restart the nfsd's/nfsiod's
> B) DNS problem; specify export by IP address
> 

There also the fact the NFS library binds the rpc code to the 
the _first_ interface that
is marked as being up. This can be a problem if it is, for example, a point to
point interface port with nothing on the other end.

I posted some pr's and to -hackers about 1year ago on this.

Duncan

---
________________________________________________________________________
Duncan Barclay          | God smiles upon the little children,
dmlb@ragnet.demon.co.uk | the alcoholics, and the permanently stoned.
________________________________________________________________________

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