Qualifier 11 Using DFT Link Service (149453)
The information in this article applies to:
- Microsoft SNA Server 2.0, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.1, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.11, when used with:
- the operating system: Microsoft Windows NT
- Microsoft SNA Server 2.11 SP1, when used with:
- the operating system: Microsoft Windows NT
This article was previously published under Q149453 SYMPTOMS
The SNA Server may send a Request/Response Unit (RU) to the DFT adapter
that is larger than the total buffer size on the adapter, which causes the
DFT connection to disconnect. The SNA Server logs an Event ID 23 with a
Qualifier of 0x11 (DSR failure) when this problem occurs.
NOTE: 137804 details another cause of an Event ID 23 with a Qualifier of
0x11 when you use a DFT Link Service on SNA Server.
CAUSE
In order to prevent SNA Server from trying to send a message larger than
the DFT card can handle (about 970 bytes), the DFT link service needs to
modify the Maximum RU size field in a BIND received from the host to
reflect the actual RU size that it can receive before it passes the BIND
request up to the SNA Server.
RESOLUTION
The Ibmdft.dll driver has been updated to modify the Maximum RU Size field
of the BIND request before it passes it on to the SNA Server.
STATUS
Microsoft has confirmed this to be a problem in Microsoft SNA Server
versions 2.1, 2.11, and 2.11.sp1.
This problem was corrected in the latest Microsoft SNA Server 2.11 U.S.
Service Pack. For information on obtaining the service pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):
| Modification Type: | Major | Last Reviewed: | 11/26/2003 |
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| Keywords: | kbbug kbfix kbnetwork KB149453 |
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