Q159288

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page	Q159288: XADM: Exchange Setup Stops During Replication with a Server	/kb/159/Q159288/

Q159288: XADM: Exchange Setup Stops During Replication with a Server

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Article: Q159288
Product(s): Microsoft Exchange
Version(s): winnt:4.0
Operating System(s): 
Keyword(s): kbsetup
Last Modified: 10-APR-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 4.0 
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SYMPTOMS
========

With TCP\IP as the transport protocol, Microsoft Exchange Server Setup appears
to stop during the replication portion of setup that displays the progress bar
stating:

  Replicating local site with server <servername>.

If the <servername> and "percentage completed" referenced in the message
does not increase over a period of approximately 15 minutes, Setup may have
stopped.

CAUSE
=====

IP routers not conforming to RFC1191 may drop frames that:

- exceed the maximum MTU size for the "next hop."

- have the "don't fragment" flag set.

WORKAROUND
==========

Microsoft Windows NT TCP provides a number of configurable features designed to
work around this router configuration limitation.

For explanations and workarounds, please see the following articles in the
Microsoft Knowledge Base:

  Q159211 Diagnoses and Treatment of Black Hole Routers

  Q136970 PMTU Black Hole Detection Algorithm Change for Windows NT 3.51

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 4.0. We are researching this problem and will post new information here
in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

A network trace taken simultaneously on both the Setup server's segment and the
server listed as <servername> is the best way to determine that this is
indeed the issue.

Analysis of the trace may reveal that frames sent from the <servername>
computer do not arrive at the Setup server. Furthermore, no ICMP diagnostic
frames are returned to the <servername> computer from the router.


Additional query words:

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Keywords          : kbsetup 
Technology        : kbExchangeSearch kbExchange400 kbZNotKeyword2
Version           : winnt:4.0

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