To delete interfaces, stop the interfaces first. When the interfaces are stopped, they become inactive. If the TCP/IP stack is currently monitoring interfaces and detects that all monitored interfaces are inactive as a result of stopping devices, the TCP/IP stack might issue messages regarding the problem and might trigger a recovery action. You can disable monitoring these interfaces. Specify the NOMONSYSPLEX keyword on the INTERFACE statement using the VARY TCPIP,,OBEYFILE command before stopping the interfaces. For more information about sysplex autonomics, see sysplex problem detection and recovery in z/OS Communications Server: IP Configuration Guide.