When running runcluvfy.sh or cluvfy, the following messages appear:
Multicast or broadcast check - This task checks that network interfaces in subnet are able to communicate over multicast group or broadcast IP address Details:
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PRVG-11138 : Interface "ens8" on node "racnode1" is not able to communicate with interface "ens8" on node "racnode1" over multicast group "224.0.0.251" - Cause: The specified interfaces were not able to communicate using a multicast address. - Action: Ensure that multicast is enabled on the specified interfaces and that a network path exists between the interfaces.
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PRVG-11138 : Interface "ens8" on node "racnode1" is not able to communicate with interface "ens8" on node "racnode1" over multicast group "230.0.1.0" - Cause: The specified interfaces were not able to communicate using a multicast address. - Action: Ensure that multicast is enabled on the specified interfaces and that a network path exists between the interfaces.
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PRVG-11352 : Interface "192.168.112.11" on node "racnode1" is not able to communicate with interface "192.168.112.11" on node "racnode1" with broadcast address "255.255.255.255" - Cause: The specified interfaces were not able to communicate using the broadcast address. - Action: Ensure that broadcast is enabled on the specified interfaces and that the network path allows broadcast.
SOLUTION
Stop and disable firewalld.
# systemctl status firewalld
# systemctl stop firewalld
# systemctl disable firewalld
# systemctl status firewalld
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