A broker system dynamically adjusts data processing techniques used by a network gateway for forwarding data over a network from a client system to an exchange system based on a switch mode parameter. The broker system dynamically adjusts the network gateway from using an error-propagating data processing technique (e.g. cut-through switching) to a non-error-propagating data processing technique (e.g. store and forward switching) based on the switch mode parameter. In particular, the broker system may adjust the network gateway when a count of unsuccessfully validated protocol data units meets a threshold specified by the switch mode parameter. While using the error-propagating technique, the broker system may modify a portion of the data protocol unit corresponding to a transport layer of a network protocol used by the network when a protocol data unit is unsuccessfully validated.