In larger environments lots of connections are made by the Plug-In backups. It is recommended to tune the network settings of the involved Windows machines in the Veeam infrastructure (Windows VBR server and Windows repository servers) according to the Microsoft guide to improve network performance:
-
Increase the available dynamic port range. The default dynamic ports range in Windows is 49152-65535 which is 16384 ports. Use the following command to increase the amount of available dynamic ports for IPv4 to 55525 without affecting ports of Veeam services:
netsh int ipv4 set dynamicport tcp start=10010 num=55525 -
Add
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\TcpTimedWaitDelayand set it to30to reduce the time a port keeps being blocked for reuse (default is 240 seconds)
