The HOST definition statement in the NCP major node has
a MAXBFRU operand for defining the number of buffers that the host
can use for receiving data from the NCP.
If you do not define the channel in a channel-attachment
major node, the MAXBFRU value on the HOST definition statement is
used because the channel is implicitly defined and activated automatically
when the NCP is activated.
However, when you define the channel in a channel-attachment
major node,
- The MAXBFRU operand on the LINE definition statement for that
major node defines the number of buffers the host can use for receiving
data.
- VTAM® ignores the MAXBFRU
value on the HOST definition statement when the link station for the
channel is activated automatically. This is because the value is determined
by the RNAME operand when the NCP is activated.
Recommendation: The MAXBFRU
operand on the LINE definition statement of the CA definition should
contain the same value as the MAXBFRU operand specified on the HOST
definition statement in the NCP major node definition.
Table 1. Channel-attachment (NCP) major
node definition statements and operandsName |
Definition statement |
Operands |
Page |
Req |
Sift effect |
Default |
Restrictions,
dependencies
|
name |
VBUILD |
TYPE=CA |
TYPE |
R |
|
|
|
|
|
CONFGDS |
CONFGDS |
|
|
|
|
|
|
CONFGPW |
CONFGPW |
|
|
|
CONFGDS
|
|
name |
GROUP |
LNCTL=NCP |
LNCTL |
R |
|
|
|
|
|
SPAN |
SPAN |
|
|
|
NetView® |
|
name |
LINE |
ADDRESS |
ADDRESS |
|
|
|
|
|
|
ISTATUS |
ISTATUS |
|
G |
ACTIVE |
|
|
|
MAXBFRU |
MAXBFRU |
|
G |
3 |
|
|
|
SPAN |
SPAN |
|
|
|
NetView |
|
name |
PU |
CHANCON |
CHANCON |
|
G,L |
COND |
LNCTL=NCP |
|
|
DELAY |
DELAY |
|
G,L |
0 |
|
|
|
ISTATUS |
ISTATUS |
|
G |
ACTIVE |
|
|
|
MAXDATA |
MAXDATA |
|
G,L |
65535 |
LNCTL=NCP |
|
|
PUTYPE |
PUTYPE |
|
G,L |
4 |
|
|
|
SPAN |
SPAN |
|
|
|
NetView |
|
|
TGN |
TGN |
|
|
1 |
PUTYPE=4, 5 |
- Legend:
- R
- Required operand.
- G
- Code this operand on the higher-level GROUP definition statement
to take advantage of the sift effect, or code it on this definition
statement.
- L
- Code this operand on the higher-level LINE definition statement
to take advantage of the sift effect, or code it on this definition
statement.
|