PRB: Host Integration Server and SNA Server send incorrect Format 3 XID commands over a channel connection (309150)

The information in this article applies to:

Microsoft Host Integration Server 2004
Microsoft Host Integration Server 2000
Microsoft SNA Server 4.0
Microsoft SNA Server 3.0

This article was previously published under Q309150

SYMPTOMS

Microsoft Host Integration Server and Microsoft SNA Server use exchange identification (XID) commands to negotiate their link roles. Format 3 XID commands contain a setting for a data link control (DLC) type.

When you connect through a channel connection, Host Integration Server and SNA Server may incorrectly mark outgoing format 3 XID commands with a DLC type of SDLC (0x01) instead of System/370 channel to controller (0x02).

CAUSE

If you do not configure the Local Node ID setting on a channel connection, the SNA Server service incorrectly sends out the format 3 XID command with a DLC type of SDLC (0x01).

RESOLUTION

To resolve this problem, configure a Local Node ID on the System Identification tab of the channel connection. You must do this even if the remote host system does not require a Local Node ID. In most cases, you can use the default Local Node ID of 05D FFFFF.

MORE INFORMATION

Byte 17 of the format 3 XID command represents the DLC type. For more information on XID commands, refer to the IBM SNA Formats documentation (IBM Document GA27-3136-12).

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

Modification Type:	Major	Last Reviewed:	3/21/2005
Keywords:	kbprb KB309150