Information About Flexible Tenant Placement on Multitenant Cisco SD-WAN Controllers
Automatic Tenant Placement by Cisco SD-WAN Manager
In Cisco vManage Release 20.8.x and earlier releases, when you onboard a tenant, Cisco SD-WAN Manager assigns a pair of multitenant Cisco SD-WAN Controllers to the tenant based on an internal algorithm that considers factors such as the following:
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number of tenant WAN edge devices that you forecast for the tenant
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number of tenants served by a pair of multitenant Cisco SD-WAN Controllers
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number of WAN edge devices connected to a pair of multitenant Cisco SD-WAN Controllers
After the tenant is onboarded, if the tenant needs to add more devices than you originally forecast, you can modify the forecast if the pair of multitenant Cisco SD-WAN Controllers serving the tenant can accommodate these additional WAN edge devices. If the Cisco SD-WAN Controllers cannot accommodate the additional WAN edge devices, you must delete the tenant and onboard the tenant again with the revised device forecast so that Cisco SD-WAN Manager assigns a suitable pair of Cisco SD-WAN Controllers. If none of the pairs of multitenant Cisco SD-WAN Controllers can accommodate the revised device forecast, add a new pair of Cisco SD-WAN Controllers and then onboard the tenant.
Flexible Tenant Placement by Provide Admin User
From Cisco vManage Release 20.9.1, while onboarding a tenant, you have the flexibility to choose the pair of multitenant Cisco SD-WAN Controllers that are assigned to the tenant. Automatic tenant placement by Cisco SD-WAN Manager continues to be the default behavior with flexible tenant placement as an optional configuration.
To help you with flexible tenant placement, Cisco SD-WAN Manager lists available multitenant Cisco SD-WAN Controllers and provides the following details, as a percentage, for each controller:
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number of tenants assigned
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number of tenant WAN edge devices connected
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memory utilized
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CPU utilized
A multitenant Cisco SD-WAN Controller can serve a maximum of 24 tenants and 1000 tenant WAN edge devices across all the tenants. While onboarding a tenant, choose a pair of controllers that can be assigned one more tenant and can also connect to the number of WAN edge devices forecast for the tenant.
After the tenant is onboarded, if the tenant needs to add more devices than you originally forecast and the assigned pair of multitenant Cisco SD-WAN Controllers cannot connect to these additional WAN edge devices, you can migrate the tenant to another pair of Cisco SD-WAN Controllers that can serve one more tenant and accommodate the revised WAN edge device forecast for the tenant. If none of the multitenant Cisco SD-WAN Controllers pairs can accommodate the revised device forecast, you can migrate other tenants to alternative Cisco SD-WAN Controllers so that the controller utilization is efficient and the tenant assignment is optimal. If the optimization doesn’t create the capacity required to accommodate the revised device forecast for the tenant, add a new pair of Cisco SD-WAN Controllers and then migrate the tenant.
Benefits of Flexible Tenant Placement on Multitenant Cisco SD-WAN Controllers
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Choose Cisco SD-WAN Controllers deployed in different failure zones to reduce the probability of both the controllers failing simultaneously. In a cloud environment, choose controllers deployed in different regions.
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Choose Cisco SD-WAN Controllers deployed in the same geographical region as the tenant WAN edge devices to reduce latency.
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Choose Cisco SD-WAN Controllers based on the CPU, DRAM, and hard disk resources allocated, and the utilization of these resources.
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Migrate a tenant to a different Cisco SD-WAN Controller to accommodate changes in the tenant device forecast.