Verifying a VTAM APPN network

Verify that your VTAM® APPN network functions properly.

Procedure

To verify that your VTAM APPN network functions properly, follow these steps:

Start VTAMs with appropriate APPN start options.
Activate NCP major node, XCA major node for 3172 connection, or an OSA connection.
Activate CP-CP session-capable APPN connections (for example, lines and PUs) to adjacent nodes and verify that CP-CP sessions are automatically started. The following message is issued:
```
IST1096I CP-CP SESSIONS WITH adjcpname ACTIVATED
```
Display adjacent control points. For example, if VTAM was started with DYNADJCP=YES, issue the following command:
```
D NET,ID=ISTADJCP,E.
```
From VTAM network nodes, display the topology of the APPN network. For example, issue the following command:
```
D NET,TOPO,ID=cp_name,LIST=ALL.
```
From VTAM end nodes, display the network node server list. For example, issue the following command:
```
D NET,NETSRVR,E.
```
Terminate one of the CP-CP sessions. For example, issue the following command:
```
V NET,TERM,LU1=cp_name,LU2=adjcp_name.
```
Reestablish the CP-CP session. For example, issue the following command:
```
V NET,ACT,ID=adjcp_name,IDTYPE=CP.
```
To verify end node registration, first activate a resource defined with REGISTER=NETSRVR on the end node (note that application program minor nodes default to REGISTER=NETSRVR). Then display the resource from the network node server directory database. For example, issue the following command:
```
D NET,DIRECTRY,ID=resource_name.
```
Verify network connectivity with any LU 6.2 resource (including control points). For example, issue the following command:
```
D NET,APING,ID=resource_name.
```
From VTAM network nodes, verify that an SSCP, CP, or LU in the network can be reached, by initiating a search. Also verify that a particular name is not duplicated in the network, which might result in session failures. For example, issue the following command:
```
D NET,DIRECTRY,ID=resource_name,SCOPE=NSEARCH.
```
Verify sessions by exchanging requests between APPN nodes.
Halt VTAM. Note that the HALT or HALT,QUICK commands checkpoint the topology and routing services database.