*BSD News Article 90490


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From: scottm@taliesin.cs.ucla.edu (Scott Michel)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: NFS struggles
Date: 6 Mar 1997 06:51:19 GMT
Organization: UCLA CS Dept
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Currently I'm stuck with 2.1.6 for a variety of reasons, principally
INRIA's IPv6 code (does not patch nicely with other kernel sources)
and MIT's severly retarded 2.2-BETA-sometime-last-october doesn't
support 3C959 cards (you criminals know who you are!)

So there's no talking me out of this release just yet.

In the meantime, I've set up an /etc/exports, turned the dials in
/etc/sysconfig, and the NFS server doesn't work.

-- But wait, there's more! --

If I hard mount the file system (called host:/misc) from an NFS client,
the mount completes. When I do a 'ls -l' of the mount point, the client
machine freezes, and a 'kill -9' won't get rid of the process:

	# mount host:/misc /mnt		# completes OK
	# ls -l /mnt			# Grip o' Death Command

-- It's not just a floor wax, it's a dessert topping too! --

I took the liberty of doing a tcpdump on that interface to figure out
what was going on. Apparently, there are a flood of ICMP messages in
response to a non-existent UDP port, generally in the 1035 - 1088
range (but this isn't constant.) The sequence of events looks something
like (names have been changed to protect the topology):

22:46:30.970045 client.bb > server.nfs: 120 getattr [|nfs]
22:46:30.970662 server-intf2.nfs > client.bb: reply ok 96
22:46:30.970718 client > server-intf2: icmp: client udp port 1039 unreachable

Any suggestions?


-scottm
--
Scott Michel
UCLA Computer Science			Engineer, Dessert Toppings/Floor Waxes
PhD Student                             Web MCache

"AND STOP CALLING ME Scooter!" :-)