| Required/Optional Statement |
Optional |
| Statement Default |
None |
| Placement in Initialization Stream |
This statement must follow
the ENDJSAM statement. |
| Coding Considerations |
- You must code a NJERMT statement for the home node (your node)
and one for each remote node that will communicate with the home node.
- All DEVICE statements with the parameter DTYPE=SYSMAIN specified
must precede the NJERMT statement.
- The JNAME parameter on a DEVICE statement that also includes a
DTYPE=NJELINE parameter must match the LINE parameter on the NJERMT
statement.
- The name specified on the NJENAME parameter of the MVS/BDT SYSID
statement (for the BDT subsystem which processes SNA/NJE work) must
match the name specified on the BDTID parameter of the NJERMT statement.
- If you are using the NAME= parameter for an XCF groupname default,
(XCFGRPNM on the OPTIONS initialization statement), then the name
must be 1-8 alphanumeric characters including $, # and @.
|
| Security Usage |
- Use the expected password (EXPWD) parameter to specify a password
that the home node expects to receive from a directly connected BSC
node. The password allows a remote node to start a communication line
to the home node. You can define the password (PWD) parameter that
the home node must send to a directly connected BSC node. This password
allows the home node to start a communication line to the remote node.
In addition, the NJERMT statement contains the EXSIG and SIG passwords
for dial-up lines.
- Use the PWCNTL parameter to specify whether job passwords should
be sent encrypted, sent without encryption, or checked only at the
local node.
- Use the SECSIGNON parameter (valid for TYPE=TCPIP
only) to indicate that the signon procedure includes additional checking
using the encryption of a random string to confirm the identity of
the node.
- Use the TLS parameter (valid for TYPE=TCPIP only)
to indicate that the TCP/IP transmission uses the Transport Layer
Secure facility.
|
| Performance Considerations |
MAXLINE and STREAM affect NJE throughput.
Specify STREAM=2 if you prefer that small jobs streams not be held
up by larger SYSOUT streams. Use as many lines between two nodes as
possible to allow more work to be sent concurrently. NJEPR and
NJEPU act as a throttle on output service. The amount of work being
actively transmitted is limited by the number and speed of the transmission
lines to directly connected nodes. The amount of SYSOUT work queued
for transmission by output service is limited by the NJEPR and NJEPU
parameters. You should set these values high enough to keep the lines
busy on a moderately loaded system, but low enough to prevent too
much work from being queued, which can degrade performance on a heavily
loaded system.
The size of JSAM buffers (defined on the BUFSIZE
parameter of the BUFFER statement) affects performance. Use the largest
buffer size possible to maximize networking performance.
|
| Initialization Stream Overrides |
None |
| Restart or Command Modification |
Cold start, warm start, or hot start
with refresh for all parameters. Use the:- *MODIFY,NJE,ADD= command to add a directly or
indirectly connected node.
- *MODIFY,NJE,ADDAL= command to add an alias.
- *MODIFY,NJE,DEL= command to delete an indirectly
connected node or an alias.
- *MODIFY,NJE,NAME=node,NETHOLD= command to change
the NETHOLD parameter.
- *MODIFY,NJE,NAME=node,PATH= command to change
the PATH parameter.
- *MODIFY,NJE,NAME=node,PWCNTL= command to change
the PWCNTL parameter.
- *MODIFY,NJE,NAME=node,RETRYCT= command to change
the RETRYCT parameter.
- *MODIFY,NJE,NAME=node,TYPE= command to change
the TYPE parameter.
- *MODIFY,NJE,NAME=node,PRTDEF=p command to change
the default print class for the home node or an alias.
- *MODIFY,NJE,NAME=node,PUNDEF=n command to change
the default punch class for the home node or an alias.
- *MODIFY,NJE,NAME=node,PRTTSO=t command to change
the default TSO class for the home node or an alias.
- *MODIFY,NJE,NAME=node,PRTXWTR=x command to change
the default external writer class for the home node or an alias.
- *MODIFY,NJE,NAME=node,SP= command
to change the SPART parameter.
- *MODIFY,NJE,NAME=node,JT= command to change the number
of job transmitters (TCP/IP only).
- *MODIFY,NJE,NAME=node,OT= command to change the number
of output transmitters (TCP/IP only).
- *MODIFY,NJE,NAME=node,JR= command to change the number
of job receivers (TCP/IP only).
- *MODIFY,NJE,NAME=node,OR= command to change the number
of output receivers (TCP/IP only).
- *MODIFY,NJE,NAME=node,TLS= command to change the
Transport Layer Secure setting (TCP/IP only).
- *MODIFY,NJE,NAME=node,SS= command to change the secure
signon setting (TCP/IP only).
Note: The NAME parameter on the NJERMT statement that
defines HOME=YES is the default for the XCFGRPNM parameter on the
OPTIONS statement during a warm or cold start. If the home node is
changed during a hot start with refresh and the XCFGRPNM parameter
is not specified, the value of XCFGRPNM that was determined from
the home node definition during the last warm or cold start remains
in effect.
|
z/OS JES3 Initialization and Tuning Reference
Copyright IBM Corporation 1990, 2014