Currently there are no published standards to estimate minimum and maximum bandwidth requirements. If you would like assistance with estimating your specific needs, please open a ticket with EMC customer support and provide the below details:
1. How many devices will be assigned to each DS (the estimate should be per Device Server).
2. How large are the configs (general estimate of total lines per config or average file size in MB)
3. Will the Device servers be local or remote in relation to the Application Server?
Support may need more information to clarify on a case by case basis.