Boot Up Baud Rate Procedure/Initilization

Currently have come to the conclusion that on bootup we get CAN error frames on chassis with 500k baud rate that are currently connected via CAN C, D of the MD4-7.  How is the boot up and initialization take place for the baud rate?  I have come to believe that the initialization isn't taking place correctly and is knocking out the 500k intermittently on startup.