Re: MCP vs NetApp

You may also want to take a trace from the network's point of view using
Wireshark (freeware at http://www.wireshark.org, used to be Ethereal) or
Netmon
(Microsoft). That will also show the flow of messages back and forth
between the
two machines/applications.

Mike Kain

"Paul Kimpel" <paul.kimpel@xxxxxxxx> wrote in message
news:BU5Bi.540$ZA5.118@xxxxxxxxxxxxxxxxxxxxxxx
On 8/27/2007 6:39 PM, Edward Reid wrote:
I'm trying to open files on a NetApp file server from an MCP program
using
REDIRECTOR. My attempts are getting the messages

REDIRECTOR:Device/File open failed. Known SMB protocols not supported.
OPEN ERROR: REDIRECTOR PROTOCOL NOT SUPPORTED BY SERVER

Supposedly the NetApp is set up to act exactly like a Windows server
(though it actually runs Linux). I can open files on a Windows 2003
Server
box in the same domain. The admin for the NetApp says if I can open files
on one I should be able to open files on the other. She is confused by
the
discrepancy and is looking into it, so far without sucess.

I don't find any related SUMLOG other than the ones listed above.

Has anyone read and written files on a NetApp from MCP programs? Any
advice?

Edward

I guess the first question I'd ask is, can you open files on the NetApp
server from a Windows 2000/XP system? If that doesn't work, then clearly
there's a problem on that server.

It appears that you are actually reaching the NetApp box from the MCP.
I've not seen that error message before, but it looks like the connection
is getting aborted fairly early in the session negotiation process. The
two most common problem areas with the Redirector that I've encountered
are basic connectivity (i.e., can the MCP get an IP address and can it
reach that IP address) and user authentication. This error appears to be
happening between those two areas.

If the NetApp server is running Linux, then check that the Samba service
is installed and running. On Fedora Core the service is named "smb". I
think this is fairly standard, but with Linux you never can tell.

There are two forms of "Windows" networking. The original one, based on
LanManager, uses NetBIOS over TCP ports 137/138/139 (I think Redirector
sessions primarily use 139). With Windows 2000, Microsoft reimplemented
the SMB protocol on TCP port 445, dropping the NetBIOS layer. The MCP's
SMB implementation (including the Redirector) does not support port 445 at
all. See if you can find out which flavor of SMB the NetApp server is
running.

Finally, the Redirector has a trace facility, which is enabled by an
option in the IOHSTRING attribute. It's documented in the I/O Subsystem
Guide in the Redirector section. That may give you or the NetApp admin
some clues as to what is going on.


.

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