Hi, bandwidth and latency would be depends on your environment size, plugins, tasks, etc.
There are whitepapers that explains about this for your references:
You may want to tune the ESXi heartbeat on high latency links ESXi host disconnects intermittently from vCenter Server (1005757) | VMware KBBayu Wibowo | vExpert NSX, VCIX6-DCV/NV, Cisco Champion, AWS-SAA
Author of VMware NSX Cookbook http://bit.ly/NSXCookbook
https://nz.linkedin.com/in/bayupw | twitter @bayupw