sjsedwards

The router is a Draytek 2760. I'm not a router expert but we have Drayteks in other similar-sized schools and they don't seem to have an issue.

We're running OPNSense/Zenarmor. We wondered if that was a bottleneck so we've tested with the firewall removed and the issue remains.

Apologies if this information is available elsewhere. Can anyone point me to real-world information on the Internet bandwidth required for reasonable performance with Azure AD in a school environment? We recently replaced an old RM network with a fully cloud-based MS365/Azure AD/Sharepoint instance. All works well with 35-40 PCs online around the school but we find, when students log into the IT Suite computers the login process kills the broadband (speed drops to 1-2Mbps), and it can take 15-20 minutes to recover. During this time we can see a fair amount of traffic on the network, which is to be expected, but the effect on the broadband seems excessive. Our experience in other schools has been that a 100M Internet line handles this sort of thing with no noticeable impact on performance. This school has an 80/20 line so we know it's not quite as capable, but the drop in performance is completely unexpected. Before we shout at the ISP, I want to be sure we haven't underestimated the traffic, however I can't find any definitive information on what's required/recommended for an installation of this kind. Any advice would be most welcome. Thanks, Stuart