updated the suse and rhel docs for sap ascs/ers cluster with note for 3 node cluster

Author: Anjan Banerjee

articles/sap/workloads/high-availability-guide-rhel-multi-sid.md

@@ -541,6 +541,12 @@ This article assumes that:
    sudo firewall-cmd --zone=public --add-port={62122,3222,3322,52213,52214,52216}/tcp
    ```
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
+
 ### Proceed with the SAP installation
 
 Complete your SAP installation by:

articles/sap/workloads/high-availability-guide-rhel-netapp-files.md

@@ -729,6 +729,12 @@ The following items are prefixed with either:
     sudo firewall-cmd --zone=public --add-port={62101,3201,3301,50113,50114,50116}/tcp
     ```
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
+
 ## SAP NetWeaver application server preparation
 
 Some databases require that the database instance installation runs on an application server. Prepare the application server VMs to be able to use them in these cases.

articles/sap/workloads/high-availability-guide-rhel-nfs-azure-files.md

@@ -648,6 +648,12 @@ The following items are prefixed with:
     sudo firewall-cmd --zone=public --add-port={62101,3201,3301,50113,50114,50116}/tcp
     ```
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
+
 ## SAP NetWeaver application server preparation
 
 Some databases require that the database instance installation runs on an application server. Prepare the application server VMs to be able to use them in these cases.  

articles/sap/workloads/high-availability-guide-suse-multi-sid.md

@@ -531,6 +531,12 @@ The following picture shows how the resources would look like in the High Availa
 
 [![A screenshot of the SUSE HAWK SAP NetWeaver cluster status screen.](./media/high-availability-guide-suse/ha-suse-multi-sid-hawk.png)](./media/high-availability-guide-suse/ha-suse-multi-sid-hawk-detail.png#lightbox)
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
+
 ### Proceed with the SAP installation
 
 Complete your SAP installation by:

articles/sap/workloads/high-availability-guide-suse-netapp-files.md

@@ -754,6 +754,11 @@ sudo crm_mon -r
 #      rsc_sap_QAS_ERS01  (ocf::heartbeat:SAPInstance):   Started anftstsapcl2
 ```
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
 ## SAP NetWeaver application server preparation
 
 Some databases require that the database instance installation is executed on an application server. Prepare the application server virtual machines to be able to use them in these cases.

articles/sap/workloads/high-availability-guide-suse-nfs-azure-files.md

@@ -645,6 +645,12 @@ sudo crm_mon -r
 #      rsc_sap_NW1_ERS01  (ocf::heartbeat:SAPInstance):   Started sap-cl1
 ```
 
+> [!Note]
+> SAP ASCS/ERS cluster can be extended from 2-node to 3-node cluster with 3rd node as a spare node for failover of ASCS or ERS services.
+> - 3-node setup can only be used for SAP systems using SAP Enqueue Replication Server 2 (ENSA2).
+> - The cluster property ‘priority-fencing-delay’ should not be used in a 3-node cluster.
+
+
 ## SAP NetWeaver application server preparation
 
 Some databases require that the database instance installation is executed on an application server. Prepare the application server virtual machines to be able to use them in these cases.