This Knowledge Document discusses the IPv4/IPv6 related definitions in member MSMCPARM.
The default setting in MSMCPARM is for IPv6
<TCPIP ipaddr="::" port/>
In case your system is not configured with an AF_INET6 domain in BPXPRMxx member, this setting will result in following message during start of MSMCPROC:
MSMC0616E The SCS address space was unable to open an INET/INET6
socket with an errno of 1114 with a message of EDC8114I Address
family not supported.
If the environment does not support IPv6, then you must change in MSMCPARM the TCPIP ipaddr to
"0.0.0.0" since the default "::" is unspecified address for IPv6.
Change in MSMCPARM <TCPIP ipaddr="::" port/> to <TCPIP ipaddr="0.0.0.0" port/>
The IPv4 unspecified address (i.e., "0.0.0.0") may be specified to indicate that the SCS address space should accept TCP connection requests through all IPv4 interfaces.
The IPv6 unspecified address (i.e., "::") may be specified to indicate that the SCS address space should accept TCP connection requests through all interfaces, both IPv4 and IPv6.
As an alternative you can do as follows:
If you add to your BPXPRMxx member, the appropriate Address Family for IPV6 support to your existing IP Address Family support, you can use "::" and be prepared to use IPV6 in the future. Below highlighted in yellow is a snippet of adding the Address Family for IPV6 to INET. You should refer to IBM manuals for complete choices and syntax.
NETWORK DOMAINNAME(AF_INET) DOMAINNUMBER(2) MAXSOCKETS(30000) TYPE(INET) INADDRANYPORT(5555) INADDRANYCOUNT(1000) NETWORK DOMAINNAME(AF_UNIX) DOMAINNUMBER(1) MAXSOCKETS(2000) TYPE(UDS) NETWORK DOMAINNAME(AF_INET6) DOMAINNUMBER(19) MAXSOCKETS(30000) TYPE(INET)
IBM Manuals for syntax and detail information on IP configuration: