Resource redundancy Azure generally reserves double your constant bandwidth for you as a redundancy. For example, if your constant bandwidth is 100G, Azure CDN will reserve 200G for you.
Spikes While it is not necessary to inform the Azure CDN team of bandwidth increases up to double the constant amount, it is essential to notify the team at least 1 week in advance of any bandwidth fluctuations that will exceed double the constant amount, so that we can provide a stable and reliable service. You can notify the team by submitting a work order.