strange behavior with gigE switch and 2.4.22 kernel

[Goutham Kurra <kurrag1@yahoo.com>]

I have the following configuration:

1. linux nfs client kernel 2.4.22 with nfs (client,
sunrpc, lockd) patches applied from trond's 2.4.22
patches. (have run connectathon on this with linux nfs
server backend successfully)

2. netapp nfs server (F760).

There's a gigE switch inbetween the client and server.

With a gigE switch in between, the 2.4.22 client
mounts the filesystem, but hangs indefinitely on a
'ls' on the mount. tcpdump shows that the readdir
request is being retransmitted over and over again.

When I replace the gigE switch with a 100/FE switch,
everything works great.

When I keep the gigE switch and use a stock redhat 9
(kernel 2.4.20-6) linux client, everything seems to
work well too.

So here's the problematic combination: linux 2.4.22
(with or without trond's patches), gigE switch in
between, and netapp nfs filer.

Any ideas on what's going on, or how I should begin to
troubleshoot/debug it?

thanks,
goutham



		
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