Slow speed when copying files on BOVPN

Hey there,

Due to issues with a datacenter, we had to moved some servers from the datacenter location to on-premise. Before this move, on-premise servers mainly only needed connectivity to azure, but now that we moved these servers, we need to move big files to azure.

I recently enabled MTU with a 1400 value to the Virtual BOVPN, this fixed our issue where the host randomly drops connectivity. However, the transfer speed went down from 45Mbps to 5-8Mbps.

I also enabled DF and set it to clear, but this didn't make much difference.

I also ran these command on both of my test hosts, with no luck. Get-SmbServerConfiguration | Select EnableSMB2Protocol Set-SmbServerConfiguration -EnableSMB2Protocol $true

do you guys have any suggestion about what to change in order to get faster transfer speeds between on-premise to azure?

Some sepcs:

Watchguard M390

ISP 1000Mbps

connecting to azure using Virtual BOVPN IKEv2