Network connectivity upgrade error
Learn how to work around network connectivity issues when upgrading the product.
For Red Hat®
OpenShift® Container Platform version
4.10 and earlier, the Container Network Interface (CNI) default was
However, from version 4.11 onwards, Red Hat
OpenShift Container Platform uses the
OVNKubernetes network plugin by default, for new installations. When you upgrade
Netcool® Operations Insight® on OpenShift, network
connectivity issues might occur. For example, some ITNM Observers might not be
able to connect.
The Red Hat OpenShift Networking network plugin is selected during installation
OVNKubernetes). This value cannot be changed
after cluster installation. From Red Hat
OpenShift Container Platform version 4.12 onwards, the
OVNKubernetes Container Network Interface (CNI) uses the
100.64.0.0/16 IPv4 subnet internally. For more information, see Cluster Network Operator and About the OVN-Kubernetes network plugin in the Red Hat
OpenShift Container Platform documentation.
Redeploy your cluster with
OpenShiftSDN or redeploy the cluster with
OVNKubernetes and customize the address range that it uses internally.
If your existing network infrastructure overlaps with the
subnet, you can specify a different IP address range for internal use by
OVNKubernetes. You must ensure that the IP address range does not overlap with any
other subnet used by your Red Hat
OpenShift Container Platform installation. The IP
address range must be larger than the maximum number of nodes that can be added to the