You can stop Shared Memory Communications over RDMA (SMC-R)
at a stack-wide level.
Procedure
Perform the following steps to stop SMC-R:
- Modify the GLOBALCONFIG statement in the TCP/IP profile
data set to include the NOSMCR parameter.
- Issue the VARY TCPIP,,OBEYFILE,profile_data_set command.
Results
The TCP/IP stack does not immediately stop all existing SMC-R
processing after the VARY TCPIP,,OBEYFILE command is processed. Existing
TCP connections that are using existing SMC-R links are unaffected
and continue to use SMC-R communications until they end or are stopped.
However, no new SMC-R link groups or links are created, and no TCP
connections that are established after this point use the existing
SMC-R links.
What to do next
When you are restarting SMC-R after a stop, the previous
SMCR parameter settings are used when they are not explicitly configured
in the OBEYFILE data set. For more information about
dynamically updating the GLOBALCONFIG
SMCR parameter, see
z/OS Communications Server: IP Configuration
Reference.