diff --git a/modules/installation-vsphere-installer-infra-requirements.adoc b/modules/installation-vsphere-installer-infra-requirements.adoc index f9adcfac7c67..9b52b86aad94 100644 --- a/modules/installation-vsphere-installer-infra-requirements.adoc +++ b/modules/installation-vsphere-installer-infra-requirements.adoc @@ -299,3 +299,24 @@ endif::[] ifeval::["{context}" == "installing-restricted-networks-vmc"] :!restricted: endif::[] + +[IMPORTANT] +==== +While provisioning more than one OCP cluster in same multicast domain with installer-provisioned vSphere installation, make sure that the VRRP router IDs should not be conflicting. + +---- +$ podman run quay.io/openshift/origin-baremetal-runtimecfg:TAG vr-ids cnf10 +APIVirtualRouterID: 147 +IngressVirtualRouterID: 2 +---- + +Where TAG is the release you are going to install, e.g., 4.8. Let's see another example: + +---- +$ podman run quay.io/openshift/origin-baremetal-runtimecfg:TAG vr-ids cnf11 +APIVirtualRouterID: 228 +IngressVirtualRouterID: 147 +---- + +In the example output above two clusters in the same multicast domain with names cnf10 and cnf11 would lead to a conflict. +====