Explanation
VTAM® issues
this message in response to a DISPLAY COS command. It displays the
name of the class of service (CoS) table associated with a specific
network and PU type 4. To determine which COS table will be used
in subsequent session initiation requests involving this PU type 4,
see the z/OS Communications Server: SNA Network Implementation
Guide.
netid, obtained
from the NETID operand, is the name of the network whose Class of
Service information is being displayed.
- If NETID is omitted, netid is the host network
identifier.
- If NETID is not * (NETID=netid or NETID=*NETWORK),
message IST862I is displayed only if the COSTAB keyword is coded on
the BUILD or NETWORK definition statement. If COSTAB is not coded, VTAM issues message IST887I.
- If DISPLAY COS,NETID=* is entered, message IST862I is displayed
for each network identified in a BUILD or NETWORK definition statement,
and for any dynamic networks that have been created.
- If DISPLAY COS,NETID=*NETWORK is entered, message IST862I displays
information for a model network.
costable1 identifies which COS tables
might be used during Class of Service resolution.
costable1 will
be one of the following:
- name
- The name of the COS table identified using the COSTAB keyword
in the BUILD or NETWORK definition statement for network netid.
- ISTSDCOS
- The name of the default COS table. ISTSDCOS is displayed only
when it has been loaded and when no COS name was specified on a BUILD
or NETWORK definition statement.
- ALGORITHM
- The default routing algorithm used during COS resolution. ALGORITHM
is displayed when a COS name was not specified in a BUILD or NETWORK
definition statement, and the default COS table, ISTSDCOS, has not
been loaded.
costable2 is present only
when netid is the same as the host network and
the value of costable came from the BUILD or NETWORK
definition statements. Either costable1 or costable2 will
be used during session initiation involving the PU type 4, based on
the COS resolution algorithm explained in the z/OS Communications Server: SNA Network Implementation
Guide.
costable2 will
be one of the following:
- ISTSDCOS
- The name of the default COS table.
- ALGORITHM
- The default routing algorithm. Note that ISTSDCOS cannot be used
since it has not been loaded.
System action
Operator response
System programmer response
None. If there is a need to change
the COS table associated with a particular resource, the MODIFY TABLE
command should be used. MODIFY TABLE can also be used to load ISTSDCOS.
Routing code
Descriptor code