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To: Andy Dills <andy@xecu.net>
Cc: freebsd-questions@freebsd.org
Subject: Re: NFS Question 
In-Reply-To: Your message of "Thu, 20 Dec 2001 13:41:35 EST."
             <Pine.GSO.4.32.0112201339510.22899-100000@shell.xecu.net> 
Date: Thu, 20 Dec 2001 18:57:23 +0000
From: Ian Dowse <iedowse@maths.tcd.ie>
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In message <Pine.GSO.4.32.0112201339510.22899-100000@shell.xecu.net>, Andy Dill
s writes:
>Doing that yields:
>
>13:37:24.143946 216.127.136.208.966 > server.ip.111:  udp 56
>13:37:24.144705 216.127.136.208.2224826569 > server.ip.2049: 40 null
>
>I've worked with tcpdump a fair amount, but I must admit that I'm not sure
>what this indicates. Any ideas or suggestions?

Hmm, the server responses should have appeared there - is the server
multi-homed or something - could it be sending the replies using the
wrong source address? Try 

	tcpdump -np -s 1600 udp port 2049

and see if you see anything that looks like it might be a response
to the

	216.127.136.208.xid > server.ip.2049: 40 null

packet. The "NFSPROC_NULL: RPC: Timed out." error means that mount_nfs
didn't get a response from the server nfsd, and the tcpdump trace
doesn't show any reply either. However, no reply is shown from the
server portmap (port 111) service yet it looks as if the client
received a reply because it immediately sent a request to nfsd.
This would tie in with a source-address problem, because in FreeBSD
the code for talking to nfsd is fussy about getting the right source
address in replies, but the code for talking to portmap isn't.

The FreeBSD nfsd has a '-h' option to force it to bind to multiple
addresses for multi-homed hosts. I'm not sure if Solaris has anything
similar.

Ian

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