The information in this article applies to:
SYMPTOMSWhen implementing an ESCON channel link service (such as the Polaris ESCON channel link service), SNA Server was not providing the control unit (CU) image number to the link service, which significantly complicates ESCON channel link configuration. CAUSESNA Server was not originally designed to return the control unit image number to the channel link service. STATUS
Microsoft has confirmed this to be a problem in SNA Server 3.0 (including
SP1 and SP2). This feature has been added to SNA Server 3.0 (post SP2)
and allows the SNA Server to return the Control Unit image number in
dataru[s+24] of the Open(Link) response.
S E R V P A C KNote that the ESCON channel link service must be written to recognize the Control Unit image number. Contact your link service vendor to determine if this is the case. If so, to make use of this new feature, the updated SNACFG.DLL must be applied and the configuration file must be resaved using SNA Server Manager. MORE INFORMATION
The Polaris ESCON link service version 2.14 (with the v1.12 version of
the Polaris ESCON configuration DLL) supports the ability to use the
Control Unit image number. Here is some additional background describing
what the control unit image number is used for:
Channel addresses to input into SNA Server configuration:
This makes configuration more difficult. With this new feature, customers
still must configure the link service as before because the ESCON channel
adapter needs to know at initialization (ie. when SNA Server is started)
which devices it will be using. But in the connection properties the user
can put in address 20 CU image 0 instead of just address 00 and so on.
The link service configuration has a check box which allows the user to choose to use the new method. This is not done automatically. The link service has to be told which of the two methods is in use since the field that contains the CU image was 0 for old version of SNA Server, but 0 is a valid CU image. Regarding the use of the Polaris ESCON link service, this change will not affect users who don't want or need to change their link service configuration. They will still be able to update the link service and driver to newer version with having to redo any part of their configuration. Additional query words:
Keywords : prodsna snaadmin kbbug3.00 kbbug3.00.sp2 kbfix3.00.sp3 kbbug3.00.sp1 snachannel snawinnt |
Last Reviewed: November 30, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |