Microsoft KB Archive/163266

= SNA Server Service Always Sends a Null XID on a Leased Line =

Article ID: 163266

Article Last Modified on 11/26/2003

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APPLIES TO


 * Microsoft SNA Server 2.0
 * Microsoft SNA Server 2.1
 * Microsoft SNA Server 3.0
 * Microsoft SNA Server 2.11 Service Pack 1
 * Microsoft SNA Server 3.0 Service Pack 4

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This article was previously published under Q163266





SYMPTOMS
Under certain circumstances it may be appropriate to configure SNA Server as the primary on a leased SDLC connection and have end to end LLC connectivity established without the prior exchange of XIDs during activation.

To enable this type of connection activation, the following change must be made to the "System Identification" parameters of the "Connection properties" for the SDLC connection in question. One set of these parameters, which together constitute the "Local Node Name", includes a parameter called the "Local Node ID". The "Local Node ID" is composed of two fields, the ID Block (first field of 3 digits) and the ID Number(second field of 5 digits), to prevent sending an XID you must delete the ID Block digits.

Note that it must be deleted (in other words, select all 3 chars and hit the DEL key) not filled with spaces. Addtionally, it is still a required to supply an ID number field (the second 5 characters) even though it will never be used.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
On leased SDLC links, SNA Server Service always sends a NULL XID and expects a response to indicate to the SNA Server Service to send the Open(Station) request to the Link Service causing the LLC mode setting command SNRM to flow to the secondary link station.

This configuration tells the SNA Server Service that there is no XID to send on the connection and as a result it will follow an Open(Link) Response OK with an Open(Station) request immediately causing the Link Service to send a SNRM.

Additional query words: null xid

Keywords: kbbug KB163266

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