To help ensure the switch is operating as smooth as it can, I would suggest running the newest firmware. 2.2.0.3 is pretty old version. www.dell.com/.../powerconnect-6224 Here is a really good white page on flow control,  www.dell.com/.../Flow-Control-and-Network-performance-with-PowerConnect.pdF With it enabled we may be seeing too many pause frames being sent, causing the degradation.  We can look at these counters by running show command. #show interfaces counters (specify the interface)
 Hi, We are using Dell powerconnect 6224 switch, sending data to its 10G port destined for 1G port (static mac binding) of around data rate of 700 - 800 Mbps but we packets drops continuously over both of the ports(got to know by snmp params of switch), and the 1G port is also connected to the receiver. Please suggest something.. Thanks,
Drops over 10G port and 1G Port