RS: Added DB port access requirement for Replica Of between different RS clusters (#1650)

* DOC-3829 RS: Added DB port access requirement for Replica Of between different RS clusters

* Updated relrefs to correct versions

Author: rrelledge

content/operate/rs/7.4/databases/import-export/replica-of/create.md

@@ -72,6 +72,12 @@ To configure a Replica Of database in the same Redis Enterprise cluster as the s
 
 To configure a Replica Of database in a different Redis Enterprise cluster from the source database:
 
+1. Ensure the source database's port is allowed through firewalls between the clusters and can be accessed by the destination cluster's nodes.
+
+    {{<note>}}
+Ports 10000-19999 are reserved for database traffic. See [Network port configurations]({{<relref "/operate/rs/7.4/networking/port-configurations">}}) for more information about ports.
+    {{</note>}}
+
 1. Sign in to the Cluster Manager UI of the cluster hosting the source database.
 
     1. In **Databases**, select the source database and then select the **Configuration** tab.

content/operate/rs/7.8/databases/import-export/replica-of/create.md

@@ -72,6 +72,12 @@ To configure a Replica Of database in the same Redis Enterprise cluster as the s
 
 To configure a Replica Of database in a different Redis Enterprise cluster from the source database:
 
+1. Ensure the source database's port is allowed through firewalls between the clusters and can be accessed by the destination cluster's nodes.
+
+    {{<note>}}
+Ports 10000-19999 are reserved for database traffic. See [Network port configurations]({{<relref "/operate/rs/7.8/networking/port-configurations">}}) for more information about ports.
+    {{</note>}}
+
 1. Sign in to the Cluster Manager UI of the cluster hosting the source database.
 
     1. In **Databases**, select the source database and then select the **Configuration** tab.

content/operate/rs/databases/import-export/replica-of/create.md

@@ -71,6 +71,12 @@ To configure a Replica Of database in the same Redis Enterprise cluster as the s
 
 To configure a Replica Of database in a different Redis Enterprise cluster from the source database:
 
+1. Ensure the source database's port is allowed through firewalls between the clusters and can be accessed by the destination cluster's nodes.
+
+    {{<note>}}
+Ports 10000-19999 are reserved for database traffic. See [Network port configurations]({{<relref "/operate/rs/networking/port-configurations">}}) for more information about ports.
+    {{</note>}}
+
 1. Sign in to the Cluster Manager UI of the cluster hosting the source database.
 
     1. In **Databases**, select the source database and then select the **Configuration** tab.