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Net ID mapping z/OS Communications Server: SNA Network Implementation Guide SC27-3672-01 |
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When computing a route to a partner in an SNI-connected network, APPN TRS might not always be able to choose the optimal NCPs. This is because the APPN portion of the route might be calculated before the address assignment for the gateway NCP. You can use the SAMAP table to inform TRS that a particular gateway NCP should be assumed when computing routes to a given Net ID. To provide this information, use the Net ID form of the SAMAP entry:
This informs TRS that when computing routes to a partner in NETX,
the gateway NCP with subarea number 03 will be used. Then, TRS can
use that information during TG selection for the CNN.
Note: The SAMAP
table on a given host can contain both types of SAMAP entries, and
this is often appropriate for VTAMs that own SNI connections.
So, a SAMAP table can contain:
Consider the example shown in Figure 1.
Figure 1. SAMAP example
In this case, the SAMAP table should reflect the following conditions:
The corresponding SAMAP table would be as follows:
The preceding example shows the subarea-to-subarea mappings together in a group, preceding the Net ID mappings. However, this sequence is only illustrative, and it is not required. |
Copyright IBM Corporation 1990, 2014
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