SNA Distinction Between XID Format 0 and Format 3
ID: Q150821
|
The information in this article applies to:
-
Microsoft SNA Server, versions 2.0, 2.1, 2.11, 2.11 SP1
on the following platforms: NT
SUMMARY
SNA Server supports two types of XIDs: Format 0 and Format 3. XIDs are used
to uniquely identify a Physical Unit (PU) to the SNA Network. Depending on
the type of PU defined, a particular XID format may have to be used.
MORE INFORMATIONFormat 3
Format 3 is required to support independent LU6.2 sessions, and it is used
to uniquely identify a PU 2.1 node to the adjacent node in the SNA network.
A PU2.1 node can support independent LU6.2 as well as LU0, 1, 2, 3, and
dependent LU6.2 sessions. When SNA Server sends a format 3 XID, the
following information is sent:
- The Local Node ID configured in the connection dialog.
- The local SNA Server's fully qualified control point name (made up of
the network name and control point name specified in the Server
Properties dialog box), if configured.
NOTE: The local SNA Server network name and control point name does not
need to be configured to support independent LU6.2 sessions to a host.
However, this information is required when you connect to an APPN
network node, such as to an AS/400, a 3174 network node, or to VTAM if
the "CPNAME" parameter is coded in the PU definition and the IDBLK and
IDNUM parameters are not configured.
- Bytes 6-18, as defined in the IBM SNA [ASCII 147]Formats Guide[ASCII 148] Chapter 2 (IBM#
GA27-3136).
- Various control vector information, such as Product ID subvector (as
documented in Chapter 2 of the SNA Server 2.11 [ASCII 147]Reference Guide,[ASCII 148]
page 25).
Format 0
Format 0 is used to uniquely identify PU2.0 nodes that rely on the host
domain's System Service Control Point (SSCP). Examples of this
configuration are PUs that support Dependent LU6.2 and LU0, 1, 2, 3
sessions. Format 0 uses the bytes 2-5 of its XID command to send the Block
Number (idblk) and Node Number (idnum) for its unique identification. See
the IBM SNA [ASCII 147]Format Guide[ASCII 148] XID I-fields chapter for details. You can
configure this in the following location in SNA Server Admin:
- Select the Connection Properties (located in the Servers and Connections
window of SNA Admin).
- Select the Setup button and configure the Local Node ID from the Local
Node Name section.
If SNA Server is configured to support 3270/Dependent LUs only, then either
Format 0 or Format 3 will work. Contact the host administrator to determine
which one to use.
To toggle SNA Server between XID types, do the following:
- Select the Connection Properties (located in the Servers and Connections
window of SNA Admin).
- Select the Setup button, and then select the Advanced Button. You will
see the XID Type dialog box.
Additional query words:
2.00 2.10 2.11 exchange id
Keywords : prodsna
Version : WINDOWS:2.0,2.1,2.11,2.11 SP1
Platform : WINDOWS
Issue type :
|