Having massive performance problems with Azure VPN.
I can do an IPerf3.exe session where it runs 80Mbs both ways, but when I try to copy a file it drops to 4Mbs. Did a capture and shows the following:
8688 0.0000008 10.0.0.10 192.168.50.20 1062438 - 1063766 5955 …A… 1025 1328 [ReTransmit #4851][Continuation to #8682] [Bad CheckSum]Flags=…A…, SrcPort=Microsoft-DS(445), DstPort=63496, PayloadLen=1328, Seq=1234546137 - 1234547465, Ack=2725474721, Win=1025
Lots of continuation issues and retransmit.
Has something to do with the MTU size I believe.
C:\Users\rtartar>ping -f -l 1370 -t 10.0.0.10
Pinging 10.0.0.10 with 1370 bytes of data:
Reply from 10.0.0.10: bytes=1370 time=61ms TTL=127
Reply from 10.0.0.10: bytes=1370 time=61ms TTL=127
Ping statistics for 10.0.0.10:
Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 61ms, Maximum = 61ms, Average = 61ms
Control-C
^C
C:\Users\rtartar>ping -f -l 1380 -t 10.0.0.10
Pinging 10.0.0.10 with 1380 bytes of data:
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Ping statistics for 10.0.0.10:
Packets: Sent = 2, Received = 0, Lost = 2 (100% loss),
Control-C
^C
Tried several things in the advance OVPN not sure any apply to the IPSEC settings.