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08.24.2004 at 07:45AM PDT, ID: 21105307

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5.6

MrxSmb 3019 Redirector Failed to Determine Connection Type

Zone: Windows 2003 Server

Tags: mrxsmb, 3019, redirector, failed, connection

When copying a file or files to or from a shared folder on either one of my w2k3 servers I usually get this warning in the event log:

Event Type:      Warning
Event Source:      MRxSmb
Event Category:      None
Event ID:      3019
Description: The redirector failed to determine the connection type.

Data:
0000: 00 00 00 00 04 00 4e 00 ......N.
0008: 00 00 00 00 cb 0b 00 80 ....Ë..
0010: 00 00 00 00 84 01 00 c0 ......À
0018: 00 00 00 00 00 00 00 00 ........
0020: 00 00 00 00 00 00 00 00 ........

I've read almost everything there is to find on this error. The shared folders I am copying to and from aren't mapped, so it's not a problem with 'net use'. It's not a problem with a poor connection because there is not much traffic and the servers are plugged into the same switch. I don't think it's a driver issue because it's happening on two different servers with two completely different NIC cards (plus I've tried a second NIC card in one of the servers). I know one of Mircosoft's KB articles says that "They have confirmed it is a problem" and "This can be safely ignored", but it's happening almost every time, and it's cluttering my logs. If indeed these errors are only being caused by a flaw in the operating system, is there really no hotfix for this? Does anyone know of anything else I can try?

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Question Stats

Zone: OS

Question Asked By: Grime121

Solution Provided By: RWrigley

Participating Experts: 3

Solution Grade: B

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08.24.2004 at 08:01AM PDT, ID: 11882213

RWrigley:

Is your server multi-homed?

08.24.2004 at 08:16AM PDT, ID: 11882427

Grime121:

one of the servers has VPN enabled using Routing and Remote Access. It has one IP for the RRAS connections, and one for the LAN. I seem to remember these warnings beginning to show up when I installed RRAS too.... The other server is the file server though, and so these warnings appear on it a lot more often. It does not have RRAS enabled, and only has one IP.

08.24.2004 at 08:25AM PDT, ID: 11882556

RWrigley:

have you tried increasing the auto-disconnect setting:

HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters\autodisconnect

The value is in minutes, so put it something huge.

08.24.2004 at 08:40AM PDT, ID: 11882804

Grime121:

I just tried that, and it didn't seem to help. It happens especially when copying files from a folder share on one computer to a folder share on another. The error appears immediately after I start copying or moving the files from one share to another.

08.24.2004 at 08:46AM PDT, ID: 11882892

RWrigley:

Hmmm...what model of NIC, and what hubs/switches between the comptuers?

08.24.2004 at 08:49AM PDT, ID: 11882944

Grime121:

One of the servers has a Realtek integrated gigabit card, and the other has an integrated intel pro 1000 XT card. Latest drivers on both of them.

Also, I'm raising the point value to 200.

08.24.2004 at 08:56AM PDT, ID: 11883025

RWrigley:

What kind(s) of hub/switch(es) are between them?

08.24.2004 at 09:01AM PDT, ID: 11883117

Grime121:

Oh yeah, sorry. There are actually two switches between them. Both switches are linksys. One switch is a 5-port linksys that also has the main router, and several other switches plugged into it. One of the switches plugged into that one is a 16-port linksys switch that has the other server plugged in to it. The response time when I ping it is <1 and there is no packet loss.

08.24.2004 at 09:10AM PDT, ID: 11883212

RWrigley:

I'd be more concerned about sustained throughput then the ability to pass through a single packet. :-)

Can I assume that neither of the switches supports Gigabit? If so, you may be experiencing a reset cuased by you network cards trying to send data faster then the hardware can accept it. If so, you can try configuring the network cards to 100tx, instead of autosensing (which is the default).

08.24.2004 at 09:40AM PDT, ID: 11883668

Grime121:

Yeah, I've actually tried that as well. I also tried turning on the "Optimal Performance" setting on the Realtek card. None of that helped.

08.24.2004 at 09:49AM PDT, ID: 11883813

RWrigley:

Hmm...did some google'ing, and found some vauge references to large file transfers failing on gigabit cards, caused by bad drivers. You said that both cards have the latest drivers...are these drivers from the motherboard company or from the chipset company?

Also, this might seem a bit banal, but have you checked the network cables? Are they all Cat5e, and do any of them have kinks or bends in them? Mostly just covering off all possiblities here...

Accepted Solution

08.24.2004 at 10:06AM PDT, ID: 11884047

Grime121:

Well, one server is a PowerEdge 2600 that I got from Dell less than a month ago. I've checked their website since then and there have been no driver updates for it. The other is a server that was just sort of thrown together. It has a Giga-byte motherboard. The driver I have I got from their site http://www.giga-byte.com/Motherboard/Support/Driver/Driver_GA-7VAXP.htm . It doesn't say specificly that it works with w2k3. It works with all other versions of Windows though....

As for the network cables, the cable to the PE 2600 is new. The cable to the other server is not. I will replace it when I get back to the office and see if that helps.

07.20.2005 at 01:51AM PDT, ID: 14482457

mortenhem:

Hi Grime121...
Did you find a solution? I have the same problem...
Regards
Morten

07.20.2005 at 06:40AM PDT, ID: 14484429

Grime121:

Nope. It's been a year now and I still haven't found a solution. I pretty much gave up on this one.

07.20.2005 at 06:44AM PDT, ID: 14484478

mortenhem:

When you get this error are the performance slow as well? and where are you copying to (Windows XP, Windows terminal server or???)

07.20.2005 at 08:08AM PDT, ID: 14485427

Grime121:

Doesn't seem to matter whether I'm copying to another server (w2k3) or a workstation (winxp). It even happens when I download stuff from the ftp server sometimes if the server has to pull the data i'm downloading from another server. I think one thing in particular that causes the error is if you transfer a file from the server to a network share on the same server. For instance, if you have a file sitting on the desktop and instead of copying it to D:\FTP_FILES you copy it to \\SERVER\FTP_FILES. It has something to do with using the loopback address.

From the things that I've read about this it is a common problem that does not seem to have a solution. It does not do any damage as far as I'm aware though. I have not seen any noticable performance decreases.

07.20.2005 at 08:10AM PDT, ID: 14485442

Grime121:

I think I need to elaborate... The example that I gave is really what causes the error for me more than anything else. I have made it a point to stop transfering files in this manner, and I now receive far less of these errors.

pk9pk9

05.02.2008 at 11:07AM PDT, ID: 21488741

Note,
Even thought this is from Dec 2007 MS it may help :

SYMPTOMS
When you map a network drive to a local share, the following error message may be reported in the system event log:
Event ID: 3019
Source: MRxSmb
Description: The redirector failed to determine the connection type.

Back to the top
CAUSE
This behavior can occur when NetBIOS over TCP/IP (NetBT) attempts to query the destination device (in this case, the loopback adapter) for network speed. The loopback adapter does not handle speed negotiation and therefore cannot negotiate the speed.

This behavior is associated only with the TCP/IP protocol because TCP/IP is the only protocol that uses the Loopback adapter.

20080236-EE-VQP-29