Knowledge Base

X.25 PU Passthrough Drops Transmission Header

Article ID: 189501

Article Last Modified on 2/23/2004

Microsoft SNA Server 4.0 Service Pack 1
Microsoft SNA Server 4.0

This article was previously published under Q189501

SYMPTOMS

Setting up PU Passthrough to IBMX25 link service fails to establish a session, because the Transmission Header is dropped from all SNA messages transmitted across the X.25 network.

CAUSE

This is a result of the IBMX25 link service, when it checks the wrong byte in the Open Station for FID-2 support. Because of other settings in the Open Station message, this situation is only seen when using PU Passthrough.

RESOLUTION

Microsoft has confirmed this to be a problem in Microsoft SNA Server version 4.0 and 4.0 SP1. This problem was corrected in the latest SNA Server version 4.0 U.S. Service Pack. For information on obtaining this Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Keywords: kbbug kbfix KB189501