Information About Cluster Management
A Cisco SD-WAN Manager cluster consists of at least three Cisco SD-WAN Manager servers. These servers manage the Cisco Catalyst SD-WAN edge devices in a network. Cisco SD-WAN Manager servers in a cluster perform specific functions based on the services that are running on them. In this way, a cluster distributes the workload among Cisco SD-WAN Manager servers while sharing information between these servers. For scaling recommendations, see Server Recommendations for your release in Cisco Catalyst SD-WAN Controller Compatibility Matrix and Server Recommendations.
Use the Cisco SD-WAN Manager cluster and perform related tasks.
window to create aFrom Cisco vManage Release 20.6.1, each Cisco SD-WAN Manager server has a persona. The persona is determined when the Cisco SD-WAN Manager server first boots up after Cisco SD-WAN Manager is installed and defines which services run on the server. The persona of a server lasts for the lifetime of the server and cannot be changed. A server must have a persona before it can be added to a cluster. For more information on personas, see Cisco Catalyst SD-WAN Manager Persona and Storage Device.
The role that a server has in a cluster depends on its persona. A Cisco SD-WAN Manager server can have any of the following personas:
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Compute+Data: Includes all services that are required for Cisco SD-WAN Manager, including services that are used for the application, statistics, configuration, messaging, and coordination
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Compute: Includes services that are used for the application, configuration, messaging, and coordination
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Data: Includes services that are used for the application and statistics
Encryption
From Cisco IOS XE Catalyst SD-WAN Release 17.14.1a, cluster traffic for all services is encrypted.
Reserved IP Addresses
From Cisco IOS XE Catalyst SD-WAN Release 17.14.1a, a WAN edge device or Cisco SD-WAN Control Components in a Cisco SD-WAN Manager cluster reserve IP addresses with the 172.30.0.0/16 prefix. These reserved IP addresses cannot be used as a system IP address by a WAN edge device or Cisco SD-WAN Control Components. If the reserved IP address is already in use by a WAN edge device or Cisco SD-WAN Control Components, open a TAC case to replace the IP addresses.