Date: Fri, 13 Sep 2002 09:13:23 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: Gordon Tetlow <gordont@gnf.org>, net@FreeBSD.ORG Subject: Re: ARP move hangs NFS mount Message-ID: <200209131613.g8DGDNcb045281@apollo.backplane.com> References: <20020912181509.GY42734@roark.gnf.org> <15745.58702.945886.573972@grasshopper.cs.duke.edu>
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:...
: > a comparison, I tried this on a linux box and it continued along without a
: > hitch. Any ideas?
:
:I'll bet that when the second head takes over, it replies using its
:own IP address, rather the IP address of the head that it took over
:from.
:
:There's something about the FreeBSD NFS client implementation which
:requires that if you make an NFS request to a certain IP address, the
:reply MUST return from that same IP address. Otherwise, the reply
:will be ignored.
:
:Matt -- Do you know off the top of your head what makes this happen?
:While I realize that its a security feature, its caused me no end of
:suffering at two different sites, and I'd really like to know how to
:disable it! ;)
:
:Thanks,
:
:Drew
It's probably because the NFS client does a connect() equivalent
for UDP mounts as well as TCP mounts. That's my guess anyway.
I'm not home at the moment so I can't investigate fully.
Try mounting the filesystem with the 'conn' option (or -c option to
mount_nfs). Alternatively, try using a TCP mount.
-Matt
Matthew Dillon
<dillon@backplane.com>
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