ISE node registering after change domain-name

Question

At Customer Site I changed the domain name of our 4 ISE server before they were registered to any deployment. I regenerated a self signed certificate and started to register the other nodes to the deployment. This went well for the 2 PSN nodes which have a ip address in a different subnet. I tried to register the presumed secondarry PAN/MnT node and got the following error message "
Node beiing registerd has FQDN 'ISE-PAN-AP02.office.intern' which cannot be resolved. Please check your DNS configuration."
My DNS config is in order.
Can anyone please tell me want possible can be the cause of this?

Answer 1

Please check these Prerequisites:
The fully qualified domain name (FQDN) of the standalone node that you are going to register, for example, ise1.cisco.com must be DNS-resolvable from the primary Administration ISE node.  Otherwise, node registration will fail. You must enter the IP addresses  and FQDNs of the ISE nodes that are part of your distributed deployment  in the DNS server.
•The  primary Administration ISE node and the standalone node that you are  about to register as a secondary node should be running the same version  of Cisco ISE.
•Node  registration fails if you provide the default credentials (username:  admin, password: cisco) while registering a secondary node. Before you  register a standalone node, you must log into its administrative user  interface and change the default password (cisco).
•You  can alternatively create an administrator account on the node that is  to be registered and use those credentials for registering that node.  Every ISE administrator account is assigned one or more administrative  roles. To register and configure a secondary node, you must have one of  the following roles assigned: Super Admin, System Admin, or RBAC Admin.  See Cisco ISE Admin Group Roles and Responsibilities for more information on the various administrative roles and the privileges associated with each of them.
•If  you plan to register a secondary Administration ISE node for high  availability, we recommend that you register the secondary  Administration ISE node with the primary first before you register other  Cisco ISE nodes. If Cisco ISE nodes are registered in this sequence,  you do not have to restart the secondary ISE nodes after you promote the  secondary Administration ISE node as your primary.
•If  you plan to register multiple Policy Service ISE nodes running Session  services and you require mutual failover among those nodes, you must  place the Policy Service ISE nodes in a node group. You must create the  node group first before you register the nodes because you need to  select the node group to be used on the registration page. See "Creating, Editing, and Deleting Node Groups" section for more information.
•Ensure  that the Certificate Trust List (CTL) of the primary node is populated  with the appropriate Certificate Authority (CA) certificates that can be  used to validate the HTTPS certificate of the standalone node (that you  are going to register as the secondary node). See the "Creating Certificate Trust Lists in the Primary Cisco ISE Node" section on page 12-24 for more information.
•After  registering your secondary node to the primary node, if you change the  HTTPS certificate on the registered secondary node, you must obtain  appropriate CA certificates that can be used to validate the secondary  node's HTTPS certificate and import it to the CTL of the primary node.  See "Creating Certificate Trust Lists in the Primary Cisco ISE Node" section on page 12-24 for more information.