Installing Zerto Virtual Replication : Zerto Virtual Replication Architecture
  
Zerto Virtual Replication Architecture
The following diagram shows how the main components of Zerto Virtual Replication are deployed across sites to provide disaster recovery across these sites.1
The following diagram shows Zerto Virtual Replication components deployed on one site and the ports and communication protocols used between the components.
Zerto Virtual Replication can be installed at multiple sites and each of these sites can be paired to another site enabling protection across sites. Zerto Virtual Replication also supports protection and recovery on a site being managed by a single vCenter Server. The following scenarios are examples of protection and recovery with a single vCenter Server.
■ From one datacenter, a branch office, to another datacenter, the main office, both managed by the same vCenter Server.
Zerto recommends installing Zerto Virtual Replication in the main office site where protected machines will be recovered.
■ From one host to a second host, both managed by the same vCenter Server.
■ To the same host but using a different datastore for recovery.
When a single vCenter Server is used, port 9081 shown in the above diagram is not used.
The following table provides basic information, shown in the above diagram, about the ports used by Zerto Virtual Replication. For a more detailed description, refer to Firewall Considerations.
Ref. #
Port
Purpose
1, 13, 15, 20
90801
Communication between the Zerto Virtual Manager and Zerto internal APIs, Zerto cmdlets, Zerto VSS Agents and the Zerto Cloud Manager.
2
443
Required between the Zerto Virtual Manager and the vCenter Server.
3, 4, 5, 14
96691
Communication between a machine running the Zerto User Interface, vSphere Web Client or Client console and the Zerto Virtual Manager for the relevant vCenter Server and between the Zerto Virtual Manager and Zerto REST APIs.
6
443
Required between an ESXi 4.x host and the Zerto Virtual Manager during installation of a Virtual Replication Appliance (VRA).
7
90811
Communication between paired Zerto Virtual Managers2.
8
443
Required between an ESXi 5.x host and the Zerto Virtual Manager during installation of a VRA.
9
22
Required between an ESXi host and the Zerto Virtual Manager during installation of a VRA.
10
4005
Log collection between the Zerto Virtual Manager and site VRAs.
11, 18
4006
Communication between the Zerto Virtual Manager and site VRAs and the site Virtual Backup Appliance.
12
4009
Communication between the Zerto Virtual Manager and site VRAs to handle checkpoints.
16
4007
Control communication between protecting and recovering VRAs.
17
4008
Communication between VRAs to pass data from protected virtual machines to a VRA on a recovery site.
19
91801
Communication between the Virtual Backup Appliance and VRA.
21
9989
HTTPS communication between the browser and the Zerto Cloud Manager.
1 The default port provided during the Zerto Virtual Replication installation which can be changed during the installation.

2 When the same vCenter Server is used for both the protected and recovery sites, Zerto Virtual Replication is installed on one site only and this port can be ignored.

Note: For details of the architecture and ports used in a cloud-based architecture environment, see Zerto Cloud Manager Installation Guide.
1 For cloud-based architecture diagrams, see Zerto Cloud Manager Installation Guide.